PersonalComputer
Local AI · PC building · Mini PCs

The right Personal Computer for running AI at home

Check whether a model fits your hardware, find the cheapest machine that runs it, and read guides where every spec and price is cited.

Can My PC Run It?

Pick a model, quantization and context length. See the memory it needs, whether it fits your GPU or unified memory, and a speed ceiling.

Llama 3.1 8B · Q4_K_M · 8k ctxFits
≈7.0 GB of 32 GB on an RTX 5090
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AI PC Builder

Set a budget and target model. Get every GPU, dual-GPU or compact system that fits, sorted by cited price, with a parts outline.

Qwen3 32B · Q4 · $2,000 budget7 options
2× RTX 5060 Ti 16GB$858 MSRP
RTX 3090 (used)$1,499 launch
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19Models tracked
9GPUs
9Systems
38Primary sources
01 / Guides

Guides

Memory, quantization and the hardware basics behind local AI. View all →

Guides

What Is VRAM and How Much Do You Need? (AI and Gaming)

VRAM explained: what video memory does, why it limits AI models and games, and how much you need for local LLMs…

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Guides

What Is VRAM and How Much Do You Need for Local LLMs?

VRAM needed to run LLMs locally by model size and quantization, from 4B to 671B, with the cheapest GPU or system…

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Guides

VRAM vs RAM

VRAM vs RAM explained: where each sits, how fast each is, and why VRAM matters more for local AI and gaming.…

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Guides

How Much RAM Do I Need for a PC in 2026?

How much RAM for a PC: practical guidance for everyday use, gaming, creative work and running AI models…

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Guides

How Much RAM for Local AI and LLMs (Is 128GB RAM Worth It?)

How much system RAM you need to run LLMs locally, and when 128GB RAM makes sense: with a GPU, on CPU only, or on…

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Guides

LLM Quantization Explained

What LLM quantization is, how Q4, Q5, Q8 and FP16 change VRAM use, and how to pick a level for your…

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Guides

Unified Memory vs VRAM for LLMs

How unified memory compares to discrete GPU VRAM for running LLMs: capacity, bandwidth and what fits on Apple…

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Guides

What Is an AI PC? NPUs Explained (Neutral Guide)

What an AI PC is, what an NPU does, how Copilot+ PCs fit in, and what matters if you want to run AI models…

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Guides

What Is a Copilot+ PC? (Neutral Explainer)

What Microsoft means by a Copilot+ PC, the hardware requirements, and how it relates to running AI models…

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Guides

OCuLink and eGPUs

OCuLink explained, OCuLink vs Thunderbolt for an external GPU for a laptop or mini PC, and what to check in an…

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Guides

Mini PC and SFF Cases

How to choose a mini PC or small form factor (SFF) case: motherboard size, GPU clearance, cooling and power supply…

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Guides

How Much Does a Personal Computer Cost in 2026?

Personal computer prices in 2026 by use: everyday PCs, gaming PCs, and AI-capable desktops and mini PCs, with…

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Guides

RAM Prices 2026

RAM price tracker: why DDR5 RAM prices rose in 2026, what memory makers and analysts forecast, and whether RAM…

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02 / Can I run it?

Can I run it?

Memory needed by model family, with the cheapest hardware that fits. View all →

03 / GPUs

GPUs

Graphics cards for local LLMs, new and used. View all →

04 / Builds

Builds

Desktop builds by budget, with cited GPU prices. View all →

05 / Compare

Compare

Head-to-head comparisons of the main options. View all →

06 / Mini PCs

Mini PCs

Compact systems with large unified memory. View all →

07 / Benchmarks

Benchmarks

Methodology and theoretical ceilings until we test. View all →

Data

Popular models at a glance

Estimated memory at 8k context and the cheapest single device in our data that fits.

ModelParams (total / active)Est. memory, Q4 @ 8k ctxEst. memory, Q8 @ 8k ctxCheapest fit in our data (Q4)
Llama 3.1 8B8.03B / 8.03B7.0 GB10.6 GBGeForce RTX 5060 ($299, GPU launch MSRP)
Qwen3 30B-A3B (MoE)30.5B / 3.3B21.1 GB34.9 GBGeForce RTX 3090 ($1,499, GPU launch MSRP)
gpt-oss-20b (MoE)21B / 3.6B13.7 GB24.8 GBGeForce RTX 5060 Ti 16GB ($429, GPU launch MSRP)
Gemma 3 27B27.4B / 27.4B19.2 GB31.6 GBGeForce RTX 3090 ($1,499, GPU launch MSRP)
Llama 3.3 70B70.6B / 70.6B46.8 GB78.7 GBGMKtec EVO-X2 (128GB / 1TB) ($3,499.99, system, listed price)
gpt-oss-120b (MoE)117B / 5.1B64.7 GB126.8 GBGMKtec EVO-X2 (128GB / 1TB) ($3,499.99, system, listed price)

Parameter counts: Google: Gemma 3 model card; Hugging Face: openai/gpt-oss-120b model card; Hugging Face: meta-llama/Llama-3.1-8B; Hugging Face: meta-llama/Llama-3.3-70B-Instruct; Hugging Face: Qwen3 model cards (e.g. Qwen/Qwen3-30B-A3B). Memory figures are our estimates (see methodology), not measurements.