AMD RX 7900 XT - 20GB usable
Specifications
| Brand | AMD |
|---|---|
| Model | RX 7900 XT |
| Usable VRAM | 20GB |
| Architecture | RDNA3 |
| CUDA / Stream Processors | 5,376 |
| Memory Bandwidth | 800 GB/s |
| TDP | 315W |
| FP32 TFLOPS | 52 |
Current Offers
Used from £588
Prices last updated:
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Price History
- eBay£588at high
For AI / LLM Use
Good for 14B models. 30B requires aggressive quantization. Verify ROCm support for the exact framework and operating system you plan to use.
What Models Can It Run?
- 14B Q6_K, 30B Q3_K (tight)
- 14B Q4_K_M, 7B full precision
- 7B Q6_K, 14B Q3_K (tight)
- 7B Q4_K_M only
Estimated Performance
Generation: ~60 tokens/sec
Prefill: ~929 tokens/sec
Recommended Quantisations
- Q4_K_M for 14B models
- Q6_K for 7B-8B models
- Q8 for 7B if VRAM allows
Pros & Cons
Pros
- High memory bandwidth for fast generation
- RDNA3 architecture: supported by current ROCm stacks
- Consumer card: easy to install, display output
Cons
- 20GB usable VRAM: may need quantization for 30B+ models
- 315W TDP: high power draw
- ROCm and CUDA-first framework compatibility should be checked before purchase
Community Verdict
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