AMD GPUs for Local AI: Prices, VRAM & the ROCm Reality

Live used prices and $/GB for AMD's best LLM cards | Updated June 2026

NVIDIA dominates the local-AI conversation, but AMD quietly offers some of the best $/GB VRAM on the market. A RX 7900 XTX gives you 24GB at $620, undercutting a used RTX 3090, and the workstation Radeon Pro W7900 packs 48GB on a single card. The question every buyer asks first: does AMD actually work for AI?

Short version: yes, but with an asterisk. AMD runs LLMs through ROCm instead of CUDA, and that's a real difference. Here's the honest picture, plus live prices for the cards people search for.

The ROCm vs CUDA Reality

This is the thing to understand before you buy AMD for AI. NVIDIA's CUDA is the default everything is built against. AMD's equivalent is ROCm, and the gap has narrowed a lot, but it hasn't closed:

• Inference is fine: llama.cpp (Vulkan/ROCm), Ollama, and LM Studio all run well on modern Radeon cards. For just running LLMs locally, AMD is a non-issue today.
• Training is where it bites: many fine-tuning repos assume CUDA. You'll hit more friction, fewer prebuilt wheels, and the occasional unsupported op.
• Setup is fiddlier: ROCm support varies by card and OS. Linux is the happy path; Windows support is improving but still trails.
• RDNA2 (RX 6000) is older: ROCm support exists but is rougher than on RDNA3 (RX 7000). For a 6700 XT, Vulkan-backed llama.cpp is often the smoother route.

Rule of thumb: buy AMD if you mainly want inference and value VRAM per dollar. Stick with NVIDIA if you plan to fine-tune or want zero setup friction.

AMD Cards for AI: Used Price & $/GB

GPU	VRAM	Used Price	$/GB	Best For
RX 6700 XT	12GB	$300	$25.00/GB	Cheapest entry. 7-8B models, gaming double-duty.
RX 7900 XT	20GB	$535	$26.75/GB	20GB sweet spot for 14-30B models.
RX 7900 XTX	24GB	$620	$25.83/GB	Best consumer value. 24GB + display out + fast.
Radeon Pro W7800	32GB	$1,900	$59.38/GB	32GB workstation card. Quiet blower, ECC.
Radeon Pro W7900	48GB	$3,550	$73.96/GB	48GB single card. AMD's answer to the A6000.

The RX 7900 XTX is the standout: 24GB of fast GDDR6 (960 GB/s) at $620, with display output and a normal cooler, typically cheaper than a used RTX 3090 with the same VRAM. For inference, it's one of the best value 24GB cards you can buy. The cheapest 24GB GPU comparison puts it in context against the NVIDIA options.

Which AMD Card Should You Buy?

• Tightest budget, also game: RX 6700 XT at $300. 12GB runs 7-8B models; use Vulkan llama.cpp for the smoothest path.
• Best all-round value: RX 7900 XTX at $620. 24GB, fast, display output, runs 30B-class models at Q4.
• Step between: RX 7900 XT at $535 if 20GB is enough and you want to save a little.
• Need 32-48GB on one card: W7800 (32GB) or W7900 (48GB). Compare against the RTX A6000 before committing, CUDA may be worth the premium at this tier.

Verdict