RX 7900 XTX vs RTX 5080
How this works
RX 7900 XTX vs RTX 5080: £969.77 vs £1,128.95 in the UK (2026-10-22), £/GB of VRAM, which AI models each runs, and a verdict.
| RX 7900 XTX | RTX 5080 | |
|---|---|---|
 |  | |
| Brand | AMD | NVIDIA |
| VRAM | 24 GB GDDR6 | 16 GB GDDR7 |
| Memory bus | 384-bit | 256-bit |
| Cheapest new UK price | £969.77 at PcNova | £1,128.95 at PCHUB.UK also Scan £1,399.99, Novatech £1,499.99, AWD-IT £1,589.99, Box £1,599.99 |
| Price history | Tracking since 20 Oct 2026🔔 Alert me | Low £1,128.95 (now)▼ 13% below 30-day avg🔔 Alert me |
| £ per GB VRAM | £40.41 | £70.56 |
| Biggest model at Q4 (est.) | Qwen2.5-Coder 32B | Phi-4 14B |
| Biggest model at Q8 (est.) | Qwen3 14B | Gemma 3 12B |
| Models that fit at Q4 | 16 of 21 | 10 of 21 |
| Software | ROCm / Vulkan (works in llama.cpp, Ollama, LM Studio; fewer tools than CUDA) | CUDA (widest support in llama.cpp, Ollama, vLLM, PyTorch) |
| Specs | TechPowerUp · our page | TechPowerUp · our page |
Verdict
- RX 7900 XTX is cheaper per GB of VRAM (£40.41 vs £70.56), and cheaper outright by £159.18.
- RX 7900 XTX has more VRAM (24 GB vs 16 GB), so it fits bigger models: up to Qwen2.5-Coder 32B at Q4 vs Phi-4 14B.
- If you want the easiest setup and the widest tool support, NVIDIA's CUDA is still the safer pick; AMD works well in llama.cpp-based apps.
This is a value-for-memory verdict for local AI, not a gaming benchmark. We haven't measured tokens/sec.
FAQ
Is the RX 7900 XTX or RTX 5080 better for local LLMs?
RX 7900 XTX is cheaper per GB of VRAM (£40.41 vs £70.56), and cheaper outright by £159.18. RX 7900 XTX has more VRAM (24 GB vs 16 GB), so it fits bigger models: up to Qwen2.5-Coder 32B at Q4 vs Phi-4 14B. If you want the easiest setup and the widest tool support, NVIDIA's CUDA is still the safer pick; AMD works well in llama.cpp-based apps.
Which is cheaper in the UK, RX 7900 XTX or RTX 5080?
On 2026-10-22: RX 7900 XTX from £969.77 (PcNova), RTX 5080 from £1,128.95 (PCHUB.UK).
Can the RX 7900 XTX and RTX 5080 run a 14B model?
RX 7900 XTX: yes at Q4; RTX 5080: yes at Q4 (our estimate, ~4k context).
More details
Prices: lowest listed new price at UK shops (AWD-IT, Box, GamingKit, Laptops Direct, Novatech, PCHUB.UK, PcNova, Scan) (GPUs and laptops). Stock not verified. Model fit: GGUF size ×1.1 + 1 GB (estimate). Other comparisons: RX 9060 XT 16GB vs RTX 5060 Ti 16GB · RTX 3060 12GB vs RX 9060 XT 16GB · RTX 5070 vs RX 9070 · RX 9070 vs RX 9070 XT · RX 9070 XT vs RTX 5070 Ti · RTX 5060 Ti 16GB vs RTX 5070 · Radeon AI PRO R9700 vs RTX 5090 · RTX 5070 vs RTX 5070 Ti laptop · RTX 5060 vs RTX 5070 laptop · RTX 3060 12GB vs Arc B580 · Arc B580 vs RX 9060 XT 16GB · RX 9060 XT 16GB vs RTX 5070 · RX 9070 vs RTX 5060 Ti 16GB · RTX 5060 Ti 16GB vs RX 9070 XT · RX 9070 XT vs RX 7900 XTX