কোন AI মডেলের জন্য কত GB Storage, RAM ও VRAM প্রয়োজন?
লোকাল LLM, image, video, vision, coding, RAG ও voice AI-এর জন্য গবেষণাধর্মী কিন্তু ব্যবহারিক বাংলা নির্দেশিকা
এক পাতায় মূল সিদ্ধান্ত
ChatGPT, Claude, Gemini, Midjourney, Runway প্রভৃতি server-এ চলে; শক্তিশালী GPU বাধ্যতামূলক নয়।
8-16GB RAM ও 4GB VRAM/CPU দিয়েও ছোট quantized LLM চালানো যায়।
16-32GB RAM এবং 8-16GB VRAM সবচেয়ে ব্যবহারিক।
64-128GB+ RAM, 48-80GB+ VRAM বা multi-GPU প্রয়োজন হতে পারে।
এই গাইডের সিদ্ধান্ত
| ব্যবহারকারী | Recommended model range | Recommended hardware | মূল ব্যবহার |
|---|---|---|---|
| শুরু করছেন | 0.6B-3B Q4 | 8-16GB RAM, 50GB free SSD | চ্যাট, লেখা, summarization, transcription |
| Balanced local AI | 4B-8B Q4 | 24-32GB RAM, 8-12GB VRAM | বাংলা/ইংরেজি, coding, RAG, SDXL |
| Creator / developer | 14B-32B Q4 | 64GB RAM, 16-32GB VRAM | strong reasoning, code agent, FLUX, local video |
| Research / enterprise | 70B-671B | 128GB-1TB RAM, 48GB+ multi-GPU | large-scale inference, serving, research |
রিপোর্টের কাঠামো
Research style
সংজ্ঞা, অনুমান, সীমাবদ্ধতা এবং official sources যুক্ত।
Presentation style
প্রতি বিভাগে visual hierarchy, charts এবং decision tables।
Practical style
আপনার hardware অনুযায়ী সরাসরি model ও setting recommendation।
Cloud AI বনাম Local AI
Cloud / Online AI
Model কোম্পানির server-এ চলে। আপনার device মূলত prompt পাঠায় এবং result দেখায়।
- Dedicated GPU প্রয়োজন নেই
- Model download করতে হয় না
- Internet ও account/subscription প্রয়োজন হতে পারে
- Mobile, tablet, low-end laptop থেকেও ব্যবহারযোগ্য
Local / Offline AI
Model weights আপনার SSD-তে থাকে এবং CPU/GPU/RAM ব্যবহার করে inference হয়।
- Privacy ও offline সুবিধা
- একবার download করলে recurrent cloud cost কমতে পারে
- Hardware, cooling ও storage গুরুত্বপূর্ণ
- Model size ও context অনুযায়ী speed বদলায়
Online AI-এর সাধারণ minimum PC
| কাজ | ন্যূনতম | ভালো অভিজ্ঞতা | Dedicated GPU |
|---|---|---|---|
| Chat / text AI | Dual-core CPU, 4GB RAM | Core i3/Ryzen 3, 8GB RAM | প্রয়োজন নেই |
| Online image AI | 4GB RAM, modern browser | 8GB RAM, stable internet | প্রয়োজন নেই |
| Online video AI | 4-8GB RAM | 8-16GB RAM | প্রয়োজন নেই |
| Local storage | 1-3GB browser/app free | 10GB free | - |
| Internet | 5 Mbps | 20 Mbps+ | - |
উদাহরণ: ChatGPT, Claude, Gemini, Microsoft Copilot, Perplexity, Midjourney, Runway, Pika ও Canva AI। Cloud platform-এর features ও limits সময়ের সঙ্গে পরিবর্তিত হতে পারে।
Storage, RAM, VRAM—এক জিনিস নয়
Storage / SSD
Model file, app, cache, LoRA, output ও temporary data রাখে। Download size এখানে গণনা হয়।
System RAM
CPU inference, offloading, OS ও model runtime-এর working memory। LM Studio loading-এর সময় weights RAM-এ allocate করে।S7
VRAM
GPU-এর high-speed memory। Model যত বেশি VRAM-এ থাকে, সাধারণত inference তত দ্রুত।
Context / KV cache
Prompt, chat history ও generated tokens-এর working memory। Context বাড়লে memory requirement বাড়ে।S9
প্রায়োগিক হিসাব
যেমন 5.2GB
app + tensors
context length
4-8GB+
| Model file | Minimum total RAM | Comfortable RAM | Recommended context |
|---|---|---|---|
| 1-2GB | 6-8GB | 12-16GB | 2K-8K |
| 3-5GB | 8-12GB | 16-24GB | 4K-16K |
| 8-10GB | 16-24GB | 32GB | 4K-32K |
| 14-20GB | 24-32GB | 48-64GB | 8K-64K |
| 40-70GB | 64-96GB | 128GB+ | hardware-dependent |
Q4, Q8, FP16 কী?
Quantization model weights-এর precision কমিয়ে file size ও memory requirement কমায়। 8-bit inference প্রায় অর্ধেক memory ব্যবহার করতে পারে; 4-bit আরও কমায়।S10
Q4 / 4-bit
সর্বাধিক জনপ্রিয় consumer option। ছোট file, কম RAM/VRAM, সাধারণত সামান্য quality loss। Q4_K_M ভালো balance।
Q8 / 8-bit
Q4-এর চেয়ে বড় ও ধীর load, কিন্তু output quality FP16-এর কাছাকাছি হতে পারে। Memory প্রায় দ্বিগুণ ধরুন।
FP16 / BF16
উচ্চ precision; file ও memory বিশাল। Research, fine-tuning বা পর্যাপ্ত GPU থাকলে ব্যবহারযোগ্য।
একই model-এর size কীভাবে বদলায়: DeepSeek-R1 উদাহরণ
| Model | Q4 | Q8 | FP16 | ব্যবহারিক সিদ্ধান্ত |
|---|---|---|---|---|
| 1.5B | 1.1GB | 1.9GB | 3.6GB | Low-end PC-তে Q4 |
| 7B | 4.7GB | 8.1GB | 15GB | 16-24GB RAM-এ Q4 |
| 14B | 9GB | 16GB | 30GB | 32GB RAM / 12GB+ VRAM |
| 32B | 20GB | 35GB | 66GB | 64GB RAM / 24GB VRAM |
| 70B | 43GB | 75GB | 141GB | Workstation |
| 671B | 404GB | 713GB | 1.3TB | Multi-GPU server/cluster |
উপরের official Ollama tag sizes দেখায় যে “parameter count” এক হলেও quantization নির্বাচন storage ও memory requirement নাটকীয়ভাবে বদলে দেয়।S4
কোনটা থেকে কোনটা বেশি powerful?
শুধু parameter count দিয়ে absolute quality মাপা যায় না—training data, architecture, reasoning tuning, multimodal capability ও task specialization গুরুত্বপূর্ণ। নিচের ladder হলো প্রায়োগিক hardware ও capability tier, benchmark ranking নয়।
basic text
daily assistant
strong local
reasoning
creator/dev
high quality
server/cluster
| Tier | সাধারণ শক্তি | Best use | প্রধান সীমাবদ্ধতা |
|---|---|---|---|
| 0.27B-1B | Basic | classification, simple Q&A, autocomplete | reasoning ও factual depth সীমিত |
| 1.5B-4B | Good lightweight | writing, summary, Bengali/English chat | complex coding ও long reasoning দুর্বল |
| 7B-8B | Strong consumer | general assistant, RAG, coding support | high-end cloud model-এর সমান নয় |
| 12B-20B | Advanced | math, reasoning, code, agents | 16-32GB memory class |
| 27B-32B | Professional | repository-level code, analysis, quality writing | 24GB VRAM / 64GB RAM desirable |
| 70B-120B | Workstation | higher accuracy, enterprise serving | cost, heat, power, multi-GPU |
| 235B-671B | Enterprise | research, large-scale agents, data center | hundreds of GB memory |
0.27B থেকে 8B: Low-end ও consumer models
| Model | Q4 download | Minimum RAM | Good RAM | Useful VRAM | Power | Best for |
|---|---|---|---|---|---|---|
| Gemma 3 270M | 292MB | 4GB | 8GB | GPU optional | ●●●●● | simple classification, tiny assistant |
| Qwen 3 0.6B | 523MB | 4GB | 8GB | GPU optional | ●●●●● | very light multilingual text |
| Gemma 3 1B | 815MB | 6GB | 8GB | 2GB | ●●●●● | summary, short Q&A |
| DeepSeek-R1 1.5B | 1.1GB | 6GB | 8GB | 2GB | ●●●●● | basic reasoning, math practice |
| Llama 3.2 1B | 1.3GB | 6GB | 8GB | 2GB | ●●●●● | rewrite, summary, simple tool use |
| Qwen 3 1.7B | 1.4GB | 6GB | 8-12GB | 2-4GB | ●●●●● | বাংলা/English daily assistant |
| Llama 3.2 3B | 2.0GB | 8GB | 12-16GB | 4GB | ●●●●● | instruction following, summarization |
| Qwen 3 4B | 2.5GB | 8GB | 16GB | 4-6GB | ●●●●● | best low-cost multilingual balance |
| Gemma 3 4B Vision | 3.3GB | 8-12GB | 16GB | 6GB | ●●●●● | text + image understanding |
| DeepSeek-R1 7B | 4.7GB | 12GB | 16-24GB | 6-8GB | ●●●●● | reasoning; slower on CPU |
| Qwen 3 8B | 5.2GB | 12-16GB | 24GB | 8GB | ●●●●● | strong general local assistant |
| DeepSeek-R1 8B | 5.2GB | 12-16GB | 24GB | 8GB | ●●●●● | reasoning + math + analysis |
Ollama official listings: Gemma 3 292MB-17GB, Qwen 3 523MB-142GB, Llama 3.2 1.3GB/2.0GB এবং DeepSeek-R1 1.1GB-404GB Q4 variants।S1S2S3S4
Qwen 3 0.6B/1.7B, DeepSeek-R1 1.5B, Llama 3.2 1B
Qwen 3 4B, Gemma 3 4B, Llama 3.2 3B
Qwen 3 8B বা DeepSeek-R1 7B/8B Q4
12B থেকে 32B: Advanced consumer ও creator models
| Model | Download | Minimum RAM | Good RAM | Recommended VRAM | Power | Best for |
|---|---|---|---|---|---|---|
| Gemma 3 12B | 8.1GB | 16GB | 24-32GB | 12GB | ●●●●● | vision, multilingual analysis, document Q&A |
| DeepSeek-R1 14B | 9.0GB | 16-24GB | 32GB | 12-16GB | ●●●●● | reasoning, math, structured analysis |
| Phi-4 14B | 9.1GB | 16-24GB | 32GB | 12-16GB | ●●●●● | math, coding, logical tasks |
| Qwen 3 14B | 9.3GB | 16-24GB | 32GB | 12-16GB | ●●●●● | multilingual general assistant |
| GPT-OSS 20B | 14GB | 16GB | 32GB | 16GB | ●●●●● | reasoning, tools, agent workflows |
| Gemma 3 27B | 17GB | 32GB | 48GB | 20-24GB | ●●●●● | high-quality vision + text |
| Qwen 3 30B | 19GB | 32GB | 48-64GB | 24GB | ●●●●● | advanced multilingual, long context |
| Qwen 3 32B | 20GB | 32GB | 48-64GB | 24GB | ●●●●● | analysis, code, knowledge work |
12-16GB VRAM sweet spot
14B class model-এর অধিকাংশ layer GPU-তে offload করা যায়। 32GB system RAM রাখলে stability ভালো হয়।
24GB VRAM sweet spot
27B-32B Q4 class local model-এর জন্য RTX 4090/সমমান 24GB GPU বেশি ব্যবহারিক।
70B থেকে 671B: Workstation ও datacenter
| Model | Q4 download | Minimum total memory | Comfortable setup | Power tier | ব্যবহার |
|---|---|---|---|---|---|
| DeepSeek-R1 70B | 43GB | 64GB | 96-128GB RAM / 48GB VRAM | Workstation | high-quality reasoning, enterprise assistant |
| GPT-OSS 120B | 65GB | 80GB GPU target | 128GB RAM / 80GB GPU | Workstation+ | agentic tasks, powerful reasoning |
| Llama 4 Scout | 67GB | 96GB | 128GB RAM / 80GB or multi-GPU | Enterprise | multimodal, very long context |
| Qwen 3 235B | 142GB | 192GB+ | 256GB+ RAM / multi-GPU | Enterprise | advanced general and multilingual work |
| Llama 4 Maverick | 245GB | 320GB+ | 512GB RAM / multi-GPU | Enterprise+ | multimodal research, large serving |
| DeepSeek-R1 671B | 404GB | 512GB+ | 768GB-1TB+ / GPU cluster | Datacenter | frontier-scale open reasoning deployment |
Official sizes: Llama 4 Scout 67GB এবং Maverick 245GB Q4; DeepSeek-R1 671B Q4 404GB; Qwen 3 235B 142GB।S4S5S2
Heat & power
Multi-GPU system-এ PSU, cooling, case airflow ও circuit load গুরুত্বপূর্ণ।
CPU offload
RAM-এ model রেখে কিছু layer GPU-তে দিলে run করা যায়, কিন্তু speed উল্লেখযোগ্যভাবে কমতে পারে।
Serving
একাধিক concurrent user, long context ও parallel requests memory requirement বহুগুণ বাড়ায়।S16
কোন কাজের জন্য কোন model best?
| Model family | বাংলা | Writing | Reasoning | Coding | Vision | Low hardware |
|---|---|---|---|---|---|---|
| Qwen 3 1.7B/4B/8B | ★★★★★ | ★★★★☆ | ★★★☆☆ | ★★★☆☆ | - | ★★★★★ |
| Gemma 3 4B/12B/27B | ★★★★☆ | ★★★★☆ | ★★★★☆ | ★★★☆☆ | ★★★★★ | ★★★★☆ |
| Llama 3.2 1B/3B | ★★☆☆☆ | ★★★★☆ | ★★☆☆☆ | ★★☆☆☆ | - | ★★★★★ |
| DeepSeek-R1 1.5B-70B | ★★★☆☆ | ★★★☆☆ | ★★★★★ | ★★★★☆ | - | ★★★☆☆ |
| Phi-4 14B | ★★★☆☆ | ★★★☆☆ | ★★★★★ | ★★★★☆ | - | ★★☆☆☆ |
| GPT-OSS 20B/120B | ★★★☆☆ | ★★★★☆ | ★★★★★ | ★★★★★ | - | ★★☆☆☆ |
| Qwen3-VL | ★★★★☆ | ★★★★☆ | ★★★★☆ | ★★★☆☆ | ★★★★★ | ★★★☆☆ |
| Qwen3-Coder 30B | ★★★☆☆ | ★★★☆☆ | ★★★★☆ | ★★★★★ | - | ★☆☆☆☆ |
বাংলা + English
Best value: Qwen 3 4B
Stronger: Qwen 3 8B/14B
Vision:
Qwen3-VL 4B বা Gemma 3 4B
Math + reasoning
Low-end: DeepSeek-R1 1.5B
Balanced: DeepSeek-R1
7B/8B
Advanced: Phi-4 বা DeepSeek 14B
Coding
Low-end: Qwen 3 4B/8B
Advanced: Qwen3-Coder
30B
Agentic: GPT-OSS 20B বা Qwen3-Coder
প্রধান recommendation
Star ratings হলো practical qualitative assessment; official benchmark ranking নয়। Language ও task অনুযায়ী ফল বদলাতে পারে।
ছবি, chart, document ও screen বুঝতে AI
| Model | Q4 size | Good RAM | Good VRAM | Best use |
|---|---|---|---|---|
| Gemma 3 4B | 3.3GB | 16GB | 6GB | image caption, screenshot Q&A, simple document |
| Gemma 3 12B | 8.1GB | 32GB | 12GB | stronger chart/document reasoning |
| Gemma 3 27B | 17GB | 48-64GB | 24GB | professional multimodal work |
| Qwen3-VL 2B | 1.9GB | 12GB | 4GB | low-hardware image understanding |
| Qwen3-VL 4B | 3.3GB | 16GB | 6-8GB | screenshots, OCR-like tasks, GUI understanding |
| Qwen3-VL 8B | 6.1GB | 24GB | 10-12GB | strong visual reasoning |
| Qwen3-VL 30B | 20GB | 64GB | 24GB+ | advanced visual agents, long context |
| Llama 4 Scout/Maverick | 67/245GB | 128/512GB | multi-GPU | enterprise multimodal research |
Qwen3-VL official family includes 2B, 4B, 8B, 30B, 32B ও 235B variants; 4B Q4 3.3GB এবং 8B Q4 6.1GB।S11 Gemma 3 4B/12B/27B text+image input support করে।S1
Document AI
PDF page screenshot, receipt, form, chart ও table বুঝতে vision model ব্যবহার করুন। Sensitive document local model-এ রাখা যায়।
GUI understanding
Qwen3-VL screen element ও spatial relationship বুঝতে পারে; automation-এর জন্য শক্তিশালী hardware দরকার হতে পারে।
OCR বনাম Vision
শুধু text extraction হলে OCR দ্রুত; layout ও meaning বুঝতে multimodal LLM বেশি কার্যকর।
Coding, RAG, embedding ও document search
Coding models
Qwen3-Coder 30B-এর Q4 file প্রায় 19GB এবং 256K context; total 30B parameters হলেও 3.3B active MoE design ব্যবহার করে।S12
Recommended hardware: 64GB RAM, 24GB VRAM। Low-end PC-তে Qwen 3 4B/8B general model ব্যবহার করুন।
RAG / document chat
Document chunks-কে embedding-এ রূপান্তর করে relevant অংশ LLM context-এ পাঠানো হয়। এতে পুরো library model-এ training করতে হয় না।
Best low-end: EmbeddingGemma 300M, 622MB।S13
Embedding models
| Model | Size | RAM | Best for |
|---|---|---|---|
| EmbeddingGemma 300M | 622MB | 4-8GB | small personal document library, semantic search |
| Qwen3-Embedding 0.6B | 639MB | 8GB | multilingual search, code/text retrieval |
| Qwen3-Embedding 4B | 2.5GB | 16GB | better multilingual RAG and clustering |
| Qwen3-Embedding 8B | 4.7GB | 24GB | high-quality enterprise retrieval |
Qwen3-Embedding supports 100+ languages and text/code retrieval use cases.S14
Stable Diffusion, SDXL ও FLUX hardware guide
| Model | Storage | Minimum RAM | Minimum VRAM | Recommended | Best use |
|---|---|---|---|---|---|
| Stable Diffusion 1.5 | 2-4GB | 8GB | 4GB | 16GB RAM, 6-8GB VRAM | 512px images, LoRA, low-end GPU |
| Stable Diffusion 2.1 | ~5GB | 8-16GB | 6GB | 16GB RAM, 8GB VRAM | general image generation |
| SDXL Base | ~7GB | 16GB | 6-8GB optimized | 32GB RAM, 12GB VRAM | 1024px, better composition |
| SDXL + Refiner | 12-15GB | 24GB | 10-12GB | 32GB RAM, 16GB VRAM | higher-quality final detail |
| FLUX.1 Schnell quantized | 10-15GB | 24GB | 8-12GB | 32GB RAM, 16GB VRAM | prompt adherence, modern quality |
| FLUX.1 full | 24GB+ | 32GB | 16-24GB | 64GB RAM, 24GB VRAM | high-end image workflow |
| Checkpoint + LoRA library | 50-200GB+ | model-dependent | model-dependent | 1-2TB SSD | creator asset library |
SDXL ও FLUX official model cards CUDA/MPS device mapping support করে; actual VRAM software optimization, resolution, batch ও precision-এর ওপর নির্ভর করে।S17S18 ComfyUI NVIDIA, AMD, Intel ও Apple Silicon support করে।S8
SD 1.5, 512×512, batch 1, low-VRAM. ControlNet/hi-res সীমিত।
SDXL optimized, multiple LoRA, larger resolutions; FLUX quantized ধীরে।
SDXL fast workflow, FLUX, multiple ControlNet, creator-grade batch.
Local video generation কেন সবচেয়ে heavy?
Video model-কে প্রতি frame-এর spatial detail এবং frame-to-frame temporal consistency ধরে রাখতে হয়। Resolution, duration ও frame count বাড়লে memory ও generation time দ্রুত বাড়ে।
| Model / class | Storage | Minimum RAM | VRAM | ব্যবহারিক মন্তব্য |
|---|---|---|---|---|
| Stable Video Diffusion | 15-25GB | 32GB | 12GB | short image-to-video clip |
| LTX Video quantized | 15-30GB | 32GB | 8-12GB | optimized workflow প্রয়োজন |
| Wan 2.1 T2V 1.3B | 15-25GB | 32GB | 8.19GB | 480p; official claim অনুযায়ী 5s clip RTX 4090-তে ~4 min |
| Wan 2.1 14B | 40-70GB | 64GB | 24GB+ | high-end GPU; offload/quantization possible |
| Hunyuan Video class | 50-100GB | 64-128GB | 24GB+ | workstation |
| High-quality 720p/1080p | 100GB+ free | 64GB+ | 24-48GB | long generation time, large output files |
Wan 2.1 official repository states T2V-1.3B requires about 8.19GB VRAM and can produce a 5-second 480p video on RTX 4090 in roughly four minutes without optimization.S19
Not practical
Experimental
Entry
Usable
Creator
High-end
Whisper speech-to-text ও local voice tools
OpenAI Whisper model requirements
| Model | Approx. download | Required VRAM | Relative speed | Recommended use |
|---|---|---|---|---|
| Tiny | ~75MB | ~1GB | ~10x | very fast rough transcription |
| Base | ~142MB | ~1GB | ~7x | lightweight transcription |
| Small | ~466MB | ~2GB | ~4x | best balance for your laptop |
| Medium | ~1.5GB | ~5GB | ~2x | better accuracy; 4GB GPU insufficient |
| Turbo | ~1.6GB | ~6GB | fast large-family variant | modern mid-range GPU |
| Large | ~2.9GB | ~10GB | 1x | accuracy-focused transcription |
Whisper official README lists tiny/base ~1GB, small ~2GB, medium ~5GB and large ~10GB VRAM.S15
Speech-to-text
Audio/video transcription, subtitle, meeting note, language detection। GTX 1050 Ti-তে Tiny/Base/Small ভালো।
Text-to-speech
Piper-এর মতো lightweight local TTS CPU-তেও চলে; neural voice cloning/expressive TTS বেশি GPU memory নেয়।
Audio cleanup
Noise removal ও source separation model অনুযায়ী 4-8GB VRAM থেকে শুরু; long audio-তে RAM ও storage বাড়ে।
VRAM অনুযায়ী GPU power map
Local AI-তে gaming benchmark-এর চেয়ে VRAM capacity অনেক সময় বেশি গুরুত্বপূর্ণ। নিচের উদাহরণগুলো capability class বোঝানোর জন্য।
GTX 1050 Ti
1-4B + SD1.5
RTX 4060
7B + SDXL opt.
RTX 3060
7-14B + SDXL
RTX 4060 Ti
14-20B + FLUX Q
RTX 4090
27-32B + video
RTX 5090
large creator AI
Official NVIDIA specifications: RTX 3060 variant 12GB, RTX 4060 Ti 16GB option, RTX 4090 24GB এবং RTX 5090 32GB।S20S21S22S23
| VRAM class | LLM | Image AI | Video AI | Verdict |
|---|---|---|---|---|
| 2-4GB | 1B-4B partial offload | SD1.5 | No | Entry / legacy |
| 6-8GB | 4B-8B | SDXL optimized | experimental | Budget |
| 10-12GB | 7B-14B | SDXL comfortable | entry short clips | Best value |
| 16GB | 14B-20B | FLUX quantized | usable optimized | Balanced creator |
| 24GB | 27B-32B | FLUX full / batch | creator-grade | High-end sweet spot |
| 32-48GB | 32B-70B partial/full | heavy workflows | high-quality local | Prosumer/workstation |
| 80GB+ | 70B-120B+ | research | research/serving | Enterprise |
Basic / Existing PC AI setup
Target
Learning, daily chat, Bangla writing, transcription, basic Stable Diffusion, personal RAG.
Model range
0.6B-4B Q4 LLM, Whisper Small, EmbeddingGemma, SD1.5.
| Component | Minimum | Recommended | কেন |
|---|---|---|---|
| CPU | 4-core AVX2 capable | 6-core modern CPU | CPU inference ও offload |
| RAM | 8GB | 16-24GB | 4B model + OS headroom |
| GPU | Integrated / 4GB | 6-8GB NVIDIA | partial offload, SD1.5 |
| Storage | 256GB SSD | 512GB NVMe, 100GB free | models + cache + outputs |
| OS | Windows 10/11, Linux, macOS | updated 64-bit OS | driver ও software support |
Recommended models
বাংলা/English
best overall
reasoning
transcription
Balanced local AI PC
LLM
7B-14B Q4, 20B optimized
Image
SDXL, ControlNet, LoRA
RAG
larger personal knowledge base
| Component | Recommended class | Alternative | Notes |
|---|---|---|---|
| CPU | Ryzen 5 / Core i5 6-10 cores | Ryzen 7 / Core i7 | GPU inference হলেও CPU গুরুত্বপূর্ণ |
| RAM | 32GB DDR4/DDR5 | 48GB | 14B, RAG, image apps |
| GPU | RTX 3060 12GB | RTX 4060 Ti 16GB | VRAM capacity first |
| Storage | 1TB NVMe | 2TB NVMe | 100-300GB model library |
| PSU | 650W quality PSU | 750W | GPU model অনুযায়ী |
Best model targets
| Task | Model | Expected result |
|---|---|---|
| বাংলা/English | Qwen 3 8B/14B | strong daily assistant |
| Reasoning | DeepSeek-R1 7B/8B/14B | good math and analysis |
| Vision | Gemma 3 12B / Qwen3-VL 8B | document and image Q&A |
| Image | SDXL Base | 1024px workflows |
| Speech | Whisper Medium/Turbo | higher transcription accuracy |
Creator / Developer AI workstation
Target workloads
27B-32B LLM, code agents, FLUX, heavy SDXL, short local video, multiple AI apps.
Ideal user
Professional content creator, developer, researcher, local AI service builder.
| Component | Recommended | Reason |
|---|---|---|
| CPU | Ryzen 9 / Core i9 class | preprocessing, offload, multitasking |
| RAM | 64GB | 30B Q4, video apps, large RAG |
| GPU | 24GB VRAM class (RTX 4090) | 27B-32B LLM + FLUX + video |
| Storage | 2TB NVMe + optional 4TB data SSD | model library ও generated media |
| PSU / cooling | 850-1000W, strong airflow | high sustained GPU load |
Qwen 3 30B/32B, DeepSeek 32B, Qwen3-Coder 30B
FLUX full/quantized, SDXL + multiple ControlNet
Wan/LTX optimized short clips, 480p/720p
Expected capability
Local chat & coding - excellent
Image generation - excellent
Video generation - usable but slow
70B model - partial offload / not ideal
Research workstation / multi-GPU server
| Target | RAM | GPU memory | Storage | Models |
|---|---|---|---|---|
| 70B local inference | 128GB | 48-80GB | 2TB+ | DeepSeek-R1 70B |
| 120B inference | 128-256GB | 80GB+ | 4TB | GPT-OSS 120B |
| 235B Q4 | 256-384GB | multi-GPU 160GB+ | 4-8TB | Qwen 3 235B |
| 400B-671B | 512GB-1TB+ | multi-GPU cluster | 8TB+ | Llama 4 Maverick, DeepSeek 671B |
Power
Dedicated high-amperage power, UPS, server-grade PSU.
Cooling
Sustained inference-এ GPU ও VRAM temperature management জরুরি।
Networking
Multi-node cluster-এ high-bandwidth interconnect latency কমায়।
Serving memory কেন বাড়ে?
Ollama FAQ অনুযায়ী parallel requests-এর memory context length ও parallel count-এর সঙ্গে scale করে।S16
কত GB বা TB storage রাখবেন?
| Category | Small setup | Balanced setup | Creator setup |
|---|---|---|---|
| OS + apps | 60-100GB | 100-150GB | 150-250GB |
| LLM library | 20-60GB | 100-250GB | 300GB-1TB |
| Image checkpoints/LoRA | 20-50GB | 100-300GB | 500GB-2TB |
| Video models | - | 50-150GB | 200GB-1TB |
| Generated outputs | 20GB | 100GB | 500GB+ |
| Free-space headroom | 50GB | 150GB | 300GB+ |
| Total recommendation | 512GB SSD | 1-2TB NVMe | 2-4TB+ |
কয়েকটি LLM + SD1.5 + Whisper
Multiple 7B-14B models + SDXL
30B models, FLUX, video, outputs
Storage management rules
Inference, fine-tuning ও training-এর পার্থক্য
Inference
Prepared model দিয়ে answer/image/video তৈরি। সবচেয়ে কম hardware। এই guide-এর model tables মূলত inference-কেন্দ্রিক।
LoRA / QLoRA
Model-এর ছোট adapter train করে style বা domain শেখানো। Quantization ও low-rank adapters memory কমায়।S10
Full training
সব weights update; optimizer states, gradients ও dataset pipeline-এর জন্য inference-এর বহু গুণ memory।
| Model class | Inference Q4 | QLoRA practical VRAM | Full fine-tune |
|---|---|---|---|
| 1B-4B | 4-8GB RAM/VRAM | 8-16GB VRAM | 16-32GB+ |
| 7B-8B | 8-16GB VRAM | 16-24GB VRAM | 48-80GB+ |
| 13B-14B | 12-16GB VRAM | 24-48GB VRAM | 80GB+ / multi-GPU |
| 30B-32B | 24GB VRAM | 48-80GB VRAM | multi-GPU |
| 70B+ | 48-80GB+ | multi-GPU | cluster |
Training estimates software, sequence length, batch size, optimizer এবং gradient checkpointing-এর ওপর ব্যাপকভাবে বদলায়; এগুলো conservative practical ranges।
Image LoRA training
SD1.5 LoRA সাধারণত 6-8GB VRAM class-এ optimized settings-এ সম্ভব; SDXL LoRA-এর জন্য 12-16GB+ বেশি ব্যবহারিক। Dataset quality, consent ও copyright rules মানতে হবে।
আপনার Acer Nitro AN515-52-এর বিশ্লেষণ
6 cores / 12 threads class
4GB VRAM
planned 24GB
~290GB free estimate
বর্তমান 8GB RAM অবস্থায়
| ভালো চলবে | সীমিত | চলবে না / practical নয় |
|---|---|---|
|
Gemma 3 270M/1B Qwen 3 0.6B/1.7B DeepSeek-R1 1.5B Llama 3.2 1B Whisper Tiny/Base/Small SD1.5 low-VRAM |
Llama 3.2 3B Qwen 3 4B Gemma 3 4B |
7B+ comfortable use SDXL heavy FLUX modern local video |
24GB RAM upgrade-এর পর
| Best choices | Possible but slow | Not recommended |
|---|---|---|
|
Qwen 3 4B Gemma 3 4B Vision Llama 3.2 3B Whisper Small SD1.5 |
DeepSeek-R1 7B/8B Qwen 3 8B Qwen3-VL 4B CPU offload workflows |
12B-14B daily use GPT-OSS 20B FLUX full Wan video |
24GB RAM-এর পর good entry local AI
SD1.5 yes, SDXL limited
cloud recommended
আপনার জন্য exact upgrade ও software plan
Hardware actions
- 8GB + 16GB = 24GB RAM
- SSD-তে 100-150GB free রাখুন
- Windows page file 16-32GB
- NVIDIA driver update
- Fan/vent পরিষ্কার ও cooling pad
- AI চালানোর সময় high-performance power mode
Software stack
- Ollama: সহজ CLI ও API
- LM Studio: graphical model manager
- ComfyUI/Forge: image generation
- Whisper: transcription
- Open WebUI: local browser chat interface
- EmbeddingGemma: document search
Recommended Ollama commands
2K-4K দিয়ে শুরু; প্রয়োজন ছাড়া 128K নয়।
Auto setting রাখুন; OOM হলে GPU layers কমান।
512×512, batch 1, low-VRAM mode।
Ollama Windows app NVIDIA ও AMD GPU support করে; official hardware page NVIDIA compute capability 5.0+ এবং compatible driver requirement উল্লেখ করে।S24S25
আপনি কী করতে চান?
Qwen 3 4B
16GB+
Qwen 3 8B
DeepSeek-R1
1.5B
7B/8B
Vision LLM
Qwen3-VL 2B
Gemma/Qwen 4B
ComfyUI
SD1.5
SDXL
Wan/LTX
Cloud use
Local creator
Whisper
Small
Large
Model download করার আগে ৫টি প্রশ্ন
Performance, privacy ও maintenance checklist
Privacy
- Local AI-তে data device-এ রাখা যায়
- তবু plugin, web search বা cloud endpoint enable থাকলে data বাইরে যেতে পারে
- Sensitive file-এর backup ও access control রাখুন
Thermal care
- Laptop vent বন্ধ করবেন না
- Long generation-এ temperature monitor করুন
- Overheating হলে model size/context কমান
- Battery-এর বদলে charger ব্যবহার করুন
Storage care
- Unused model delete
- Duplicate quantization এড়ান
- Cache ও temp review
- SSD free space বজায় রাখুন
Quality control
- AI answer যাচাই করুন
- Model card ও license পড়ুন
- Medical/legal/financial সিদ্ধান্তে expert source ব্যবহার করুন
- Private data দিয়ে public model fine-tune করবেন না
Troubleshooting map
| Problem | Likely cause | Fix |
|---|---|---|
| Out of memory | Model/context বড় | Q4, context কমান, GPU layers কমান |
| খুব ধীর | CPU offload বেশি | ছোট model, বেশি VRAM, background apps বন্ধ |
| Laptop গরম | sustained load | cooling, power limit, shorter jobs |
| Output দুর্বল | model too small / prompt unclear | larger model বা structured prompt |
| Disk দ্রুত ভরে | duplicate models / outputs | model library audit, archive drive |
প্রয়োজনীয় AI hardware শব্দকোষ
| Term | সহজ ব্যাখ্যা |
|---|---|
| Parameter (B) | Model-এর learned numerical weights-এর সংখ্যা; B = billion। বড় হলেই সব task-এ ভালো—এমন নয়। |
| Weights | Model-এর শেখা values, যা file হিসেবে download করা হয়। |
| Inference | Prepared model দিয়ে নতুন output তৈরি করা। |
| Quantization | Weight precision কমিয়ে model ছোট ও memory-efficient করা। |
| Q4_K_M | Popular 4-bit GGUF quantization; size ও quality-এর balance। |
| FP16/BF16 | 16-bit high-precision formats; বেশি memory লাগে। |
| Context length | Model একবারে কত token “মনে” রাখতে পারে। |
| KV cache | Context processing-এর memory cache; context বাড়লে এটি বাড়ে। |
| GPU offload | Model-এর কিছু/সব layer GPU-তে পাঠানো। |
| MoE | Mixture-of-Experts; total parameters বেশি হলেও প্রতি token-এ কিছু experts active হয়। |
| LoRA / QLoRA | কম memory-তে model adaptation/fine-tuning পদ্ধতি। |
| RAG | External document থেকে relevant text এনে LLM-কে answer করানো। |
| Embedding | Text-কে numerical vector-এ রূপান্তর, যাতে semantic similarity search করা যায়। |
| Checkpoint | Image/LLM model weight file-এর saved version। |
| ControlNet | Pose, depth, edge ইত্যাদি দিয়ে image generation নিয়ন্ত্রণের model। |
| Token | Text-এর ছোট unit; word-এর অংশও হতে পারে। |
তথ্যসূত্র ও সীমাবদ্ধতা
- S1. Ollama, “Gemma 3” model library: model sizes 270M-27B, text/image support, context information. https://ollama.com/library/gemma3
- S2. Ollama, “Qwen 3” model library: 0.6B-235B model sizes. https://ollama.com/library/qwen3
- S3. Ollama, “Llama 3.2” model library: 1B and 3B model sizes. https://ollama.com/library/llama3.2
- S4. Ollama, “DeepSeek-R1 Tags”: Q4/Q8/FP16 file sizes from 1.5B to 671B. https://ollama.com/library/deepseek-r1/tags
- S5. Ollama, “Llama 4 Tags”: Scout and Maverick model sizes and context. https://ollama.com/library/llama4/tags
- S6. Ollama, “GPT-OSS”: 20B/120B sizes and MXFP4 memory targets. https://ollama.com/library/gpt-oss
- S7. LM Studio Docs, System Requirements: AVX2, 16GB RAM and 4GB VRAM recommendations. https://lmstudio.ai/docs/app/system-requirements
- S8. ComfyUI official GitHub: supported operating systems and GPU families. https://github.com/Comfy-Org/ComfyUI
- S9. Ollama Docs, Context Length: context defaults and memory impact. https://docs.ollama.com/context-length
- S10. Hugging Face bitsandbytes documentation: 8-bit and 4-bit quantization memory reduction. https://huggingface.co/docs/bitsandbytes/main/en/index
- S11. Ollama, Qwen3-VL tags: 2B-235B multimodal model sizes. https://ollama.com/library/qwen3-vl/tags
- S12. Ollama, Qwen3-Coder: 30B MoE coding model and 19GB Q4 variant. https://ollama.com/library/qwen3-coder
- S13. Ollama, EmbeddingGemma: 300M, 622MB embedding model. https://ollama.com/library/embeddinggemma
- S14. Ollama, Qwen3-Embedding: 0.6B/4B/8B sizes and multilingual retrieval uses. https://ollama.com/library/qwen3-embedding
- S15. OpenAI Whisper official GitHub README: model sizes, VRAM and relative speed. https://github.com/openai/whisper/blob/main/README.md
- S16. Ollama FAQ: parallel requests, context length and memory scaling. https://docs.ollama.com/faq
- S17. Stability AI, SDXL Base model card. https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0
- S18. Black Forest Labs, FLUX.1-schnell model card. https://huggingface.co/black-forest-labs/FLUX.1-schnell
- S19. Wan-Video/Wan2.1 official repository: T2V-1.3B VRAM and generation example. https://github.com/Wan-Video/Wan2.1
- S20. NVIDIA, GeForce RTX 3060 specifications: 12GB option. https://www.nvidia.com/en-us/geforce/graphics-cards/30-series/rtx-3060-3060ti/
- S21. NVIDIA, GeForce RTX 4060 Ti specifications: 16GB option. https://www.nvidia.com/en-us/geforce/graphics-cards/40-series/rtx-4060-4060ti/
- S22. NVIDIA, GeForce RTX 4090 specifications: 24GB memory. https://www.nvidia.com/geforce/graphics-cards/40-series/rtx-4090/
- S23. NVIDIA, GeForce RTX 5090 specifications: 32GB GDDR7 memory. https://www.nvidia.com/en-us/geforce/graphics-cards/50-series/rtx-5090/
- S24. Ollama Docs, Hardware Support. https://docs.ollama.com/gpu
- S25. Ollama Docs, Windows application and GPU support. https://docs.ollama.com/windows
Access date: 29 July 2026. Model tags, software requirements ও hardware support ভবিষ্যতে পরিবর্তিত হতে পারে। কেনার আগে current official documentation যাচাই করুন।