readygpu

NVIDIA GeForce RTX 5080 vs AMD Radeon RX 7900 XTX

For running models locally, priced in the UK. At 8k context the first runs 16 models fully in memory, the second 28.

In short

The AMD Radeon RX 7900 XTX has more memory for models: 24 GB against 16 GB. At 8k context the AMD Radeon RX 7900 XTX runs 28 of the models we track fully in memory and the NVIDIA GeForce RTX 5080 16; only the AMD Radeon RX 7900 XTX holds Qwen 3.8 27B. On the models both run fully in memory, the NVIDIA GeForce RTX 5080 is about 1.1× as fast as the AMD Radeon RX 7900 XTX (estimated, median across models). In the UK the NVIDIA GeForce RTX 5080 costs £1,199 at eBay and the AMD Radeon RX 7900 XTX £999 at Amazon: the AMD Radeon RX 7900 XTX is £200 cheaper.

Updated . Speeds are estimates; how they are worked out.

NVIDIA GeForce RTX 5080

£1,199

eBay

Add to build
AMD Radeon RX 7900 XTX

£999

Amazon

Add to build

Specifications

SpecNVIDIA GeForce RTX 5080AMD Radeon RX 7900 XTX
GPUGeForce RTX 5080Radeon RX 7900 XTX
Memory16 GB GDDR724 GB GDDR6
Memory bus256-bit384-bit
Memory bandwidth960 GB/s960 GB/s
FP16 compute113 TFLOPS123 TFLOPS
SoftwareCUDAROCm
Board power360 W355 W
PCIe generationGen 5Gen 4
PCIe lanesx16x16

What each runs

Estimated decode speed with the most precise quant that fits each one est.

ModelNVIDIA GeForce RTX 5080AMD Radeon RX 7900 XTX
Qwen 3.8 27Boffload23tok/sUD-Q6_K
Qwen 3.6 27Boffload23tok/sQ6_K
Gemma 4 31Boffload23tok/sQ5_K_M
Qwen 3.6 35B-A3Boffload153tok/sUD-Q4_K_M
Qwen 3.5 27Boffload23tok/sQ6_K
Gemma 4 26B-A4Boffload80tok/sUD-Q6_K
Devstral Small 2 24B38tok/sQ4_K_M26tok/sQ6_K
Qwen 3.5 35B-A3Boffload153tok/sQ4_K_M
GLM 4.7 Flashoffload79tok/sQ5_K_M
gpt-oss 20B136tok/sMXFP4120tok/sMXFP4
Qwen3 Coder 30B-A3Boffload108tok/sQ5_K_M
Qwen3 32Boffload24tok/sQ4_K_M
Gemma 4 12B45tok/sQ8_040tok/sQ8_0
Qwen 3.5 9B60tok/sQ8_054tok/sQ8_0
Mistral Small 3.2 24B38tok/sQ4_K_M26tok/sQ6_K
Gemma 3 27Boffload23tok/sQ6_K
DeepSeek R1 Distill Qwen 32Boffload24tok/sQ4_K_M
Qwen3 14B44tok/sQ6_K31tok/sQ8_0
Ministral 3 14B38tok/sQ8_034tok/sQ8_0
DeepSeek R1 0528 Qwen3 8B60tok/sQ8_053tok/sQ8_0
Qwen3 8B60tok/sQ8_053tok/sQ8_0
Phi-4 14B43tok/sQ6_K31tok/sQ8_0
Qwen 3.5 4B124tok/sQ8_0110tok/sQ8_0
Ministral 3 8B59tok/sQ8_052tok/sQ8_0
Granite 4.2 8B56tok/sQ8_049tok/sQ8_0
Gemma 4 E4B70tok/sQ8_062tok/sQ8_0
LFM2.5 8B-A1B244tok/sQ8_0216tok/sQ8_0
Llama 3.1 8B78tok/sQ6_K69tok/sQ6_K
Qwen 3.5 122B-A10Boffloadoffload
Qwen3 Coder Nextwon't runoffload
Mistral Small 4 119Boffloadoffload
GLM 4.5 Airwon't runoffload
Qwen3 Next 80B-A3Bwon't runoffload
Nemotron 3.5 Lightning 30B-A3Boffloadoffload
Kimi Linear 48B-A3Boffloadoffload
Llama 3.3 70Bwon't runoffload
DeepSeek V4 Flashwon't runwon't run
GLM 5.3 Flashwon't runwon't run
Qwen 3.8 Flash Nextwon't runwon't run
MiniMax M2.7won't runwon't run
Nemotron 3 Super 120B-A12Bwon't runwon't run
gpt-oss 120Bwon't runwon't run

Questions

Which is better for local AI, the NVIDIA GeForce RTX 5080 or the AMD Radeon RX 7900 XTX?
Choose the AMD Radeon RX 7900 XTX to run bigger models. Choose the NVIDIA GeForce RTX 5080 for speed. Choose the AMD Radeon RX 7900 XTX to spend less.
Which can run bigger models, the NVIDIA GeForce RTX 5080 or the AMD Radeon RX 7900 XTX?
At 8k context the AMD Radeon RX 7900 XTX runs 28 of the models we track fully in memory and the NVIDIA GeForce RTX 5080 16; only the AMD Radeon RX 7900 XTX holds Qwen 3.8 27B.
Which is faster for local AI, the NVIDIA GeForce RTX 5080 or the AMD Radeon RX 7900 XTX?
On the models both run fully in memory, the NVIDIA GeForce RTX 5080 is about 1.1× as fast as the AMD Radeon RX 7900 XTX (estimated, median across models).
What is the price difference between the NVIDIA GeForce RTX 5080 and the AMD Radeon RX 7900 XTX?
In the UK the NVIDIA GeForce RTX 5080 costs £1,199 at eBay and the AMD Radeon RX 7900 XTX £999 at Amazon: the AMD Radeon RX 7900 XTX is £200 cheaper.

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