AI hardware hub
Compare performance in our RTX 4070 vs 4090 comparison.
On a budget? Check our budget AI GPU guide.
For image generation, read our Stable Diffusion GPU guide.
For large models, see our best GPU for LLMs guide.
AI Hardware Guide: GPUs, VRAM, and System Requirements for Local AI
Use this hub to choose by workload, not by hype. Start with the route that matches your main bottleneck, then move into the deeper guide that answers it.
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TOP PICKS
Fastest hardware buying routes
Use these shortcuts when you already know the bottleneck you are buying around.
Best value tier
GPU ranking sweet spot
Start with the 4070/4080-class route if you want the strongest blend of cost and real AI usefulness.
Local image generation
Stable Diffusion route
Use this route when VRAM is your main constraint and you want practical guidance instead of theory.
Top-end headroom
Premium local AI route
Go here if you know you want the highest practical consumer-tier performance and more runway.
What are you trying to do?
Compare GPU tiers
Start here if you are choosing between RTX 4060, 4070, 4080, and 4090 classes.
Plan VRAM requirements
Use this when your main question is model size, image resolution, or memory headroom.
Run local LLMs
Jump here if you want practical hardware guidance for inference on consumer laptops and GPUs.
Build for Stable Diffusion
Choose this if your focus is ComfyUI, SDXL, or image-generation throughput.
Quick comparison: what matters most?
| Question | Primary factor | Start with |
|---|---|---|
| Can I run this model at all? | VRAM | VRAM guide |
| How fast will it run? | GPU tier | GPU ranking |
| Which laptop should I buy? | Thermals + workload fit | Best AI laptops |
| Should I optimize for local LLMs or image generation? | Workflow type | Local LLM guide / Stable Diffusion guide |
Quick AI hardware decision table
This block is designed for readers who want a quick recommendation without reading every section first.
| Option | Best for | Tier | Action |
|---|---|---|---|
| RTX 4090 | Heavy local LLMs + serious image generation • Premium | 24GB | See the top pick |
| RTX 4070 Ti Super | Best value starting point • Mid-range | 16GB | Check value picks |
| VRAM comparison | You are still choosing memory tiers • Guide | 8GB-24GB | Compare VRAM tiers |
Recommended starting guides
How this hub fits the rest of the site
The AI Hardware section is built for readers who want to decide whether GPU tier, VRAM, or a complete system change is the real bottleneck. Use this hub to move from general hardware questions into the exact guide that matches your workload.
If you are still choosing between laptop-first and GPU-first buying, compare this section with the Guides hub and the AI laptop roundup. That path gives you one hub for framework, one for rankings, and one for final buying decisions.
Best starting buys by goal
Use these shortcuts if you already know your workload and want the fastest route to current options.
Best overall GPU route
RTX 4090
For serious local LLMs, Stable Diffusion, and headroom.
Who this is for: buyers who want a faster decision and a narrower shortlist.
See today’s dealPrices change frequently — check the latest deal before you buy.Best value route
RTX 3090
Still compelling for VRAM-heavy local work at used-market pricing.
Who this is for: buyers who want a faster decision and a narrower shortlist.
See today’s dealPrices change frequently — check the latest deal before you buy.Best budget-aware route
RTX 4070 Ti Super
A strong current-gen entry point before you overspend.
Who this is for: buyers who want a faster decision and a narrower shortlist.
See today’s dealPrices change frequently — check the latest deal before you buy.Still deciding between GPU tiers?
Use the VRAM comparison first, then jump into the LLM or Stable Diffusion buying pages once you know your memory target.
Compare VRAM tiers nowUse the guide to tighten the shortlist before comparing prices.Fresh comparison pages
Use these side-by-side comparisons if you are narrowing a shortlist and want the fastest decision path.
Quick Reference
Consumer GPU Tiers at a Glance — May 2026
| GPU | VRAM | Best For | Street Price |
|---|---|---|---|
| RTX 5090 | 32 GB GDDR7 | Max headroom — 70B+ models, full FLUX.1, serious fine-tuning | ~$3,400–$3,900 ($1,999 MSRP) |
| RTX 5080 | 16 GB GDDR7 | Blackwell image gen leader — FLUX.1, SDXL, fast LLM inference | ~$1,250–$1,450 ($999 MSRP) |
| RTX 4090 | 24 GB GDDR6X | Heavy local LLMs + top-tier image gen — the previous VRAM king | ~$1,799–$2,099 |
| RTX 4070 Ti Super | 16 GB | Best value — 34B quantized, SDXL, solid LLM throughput | ~$579–$649 |
| RTX 4060 Ti 16 GB | 16 GB | Budget VRAM pick — 13B–20B models at slower speeds | ~$349–$399 |
| RTX 4070 | 12 GB | 13B models + SDXL without compromise | ~$449–$549 |
| RTX 4060 | 8 GB | 7B–8B models, SDXL at 1024px — know the ceiling | ~$269–$329 |
Best next comparison pages
These direct head-to-head guides are the fastest way to narrow your shortlist.