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AMD Radeon RX 7900 XT vs AMD Radeon RX 7900 XTX

For running models locally, priced in the US. At 128k context the first runs 6 models fully in memory, the second 8.

In short

The AMD Radeon RX 7900 XTX has more memory for models: 24 GB against 20 GB. At 128k context the AMD Radeon RX 7900 XTX runs 8 of the models we track fully in memory and the AMD Radeon RX 7900 XT 6; only the AMD Radeon RX 7900 XTX holds Gemma 4 26B-A4B. On the models both run fully in memory, the AMD Radeon RX 7900 XTX is about 1.2× as fast as the AMD Radeon RX 7900 XT (estimated, median across models). In the US the AMD Radeon RX 7900 XT costs $800 at Amazon and the AMD Radeon RX 7900 XTX $1,533 at Amazon: the AMD Radeon RX 7900 XT is $733 cheaper.

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

AMD Radeon RX 7900 XT

$800

Amazon

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AMD Radeon RX 7900 XTX

$1,533

Amazon

Add to build

Specifications

SpecAMD Radeon RX 7900 XTAMD Radeon RX 7900 XTX
GPURadeon RX 7900 XTRadeon RX 7900 XTX
Memory20 GB GDDR624 GB GDDR6
Memory bus320-bit384-bit
Memory bandwidth800 GB/s960 GB/s
FP16 compute103 TFLOPS123 TFLOPS
SoftwareROCmROCm
Board power315 W355 W
PCIe generationGen 4Gen 4
PCIe lanesx16x16

What each runs

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

ModelAMD Radeon RX 7900 XTAMD Radeon RX 7900 XTX
Gemma 4 26B-A4Boffload57tok/sUD-Q4_K_M
gpt-oss 20B47tok/sMXFP456tok/sMXFP4
Gemma 4 12B29tok/sQ8_035tok/sQ8_0
Qwen 3.5 9B32tok/sQ8_038tok/sQ8_0
Qwen 3.5 4B50tok/sQ8_060tok/sQ8_0
Gemma 4 E4B37tok/sQ8_044tok/sQ8_0
LFM2.5 8B-A1B35tok/sQ8_042tok/sQ8_0
Llama 3.1 8Boffload23tok/sQ5_K_M
Qwen 3.8 27Boffloadoffload
Qwen 3.5 122B-A10Boffloadoffload
Qwen 3.6 27Boffloadoffload
Gemma 4 31Boffloadoffload
Mistral Small 4 119Boffloadoffload
Qwen 3.6 35B-A3Boffloadoffload
Qwen 3.5 27Boffloadoffload
Qwen 3.5 35B-A3Boffloadoffload
GLM 4.7 Flashoffloadoffload
Devstral Small 2 24Boffloadoffload
Nemotron 3.5 Lightning 30B-A3Boffloadoffload
Kimi Linear 48B-A3Boffloadoffload
Qwen3 Coder 30B-A3Boffloadoffload
Gemma 3 27Boffloadoffload
Mistral Small 3.2 24Boffloadoffload
Ministral 3 14Boffloadoffload
Qwen3 14Boffloadoffload
DeepSeek R1 0528 Qwen3 8Boffloadoffload
Qwen3 8Boffloadoffload
Phi-4 14Boffloadoffload
Ministral 3 8Boffloadoffload
Granite 4.2 8Boffloadoffload
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
Qwen3 Coder Nextwon't runwon't run
gpt-oss 120Bwon't runwon't run
GLM 4.5 Airwon't runwon't run
Qwen3 Next 80B-A3Bwon't runwon't run
Qwen3 32Bwon't runwon't run
DeepSeek R1 Distill Qwen 32Bwon't runwon't run
Llama 3.3 70Bwon't runwon't run

Questions

Which is better for local AI, the AMD Radeon RX 7900 XT or the AMD Radeon RX 7900 XTX?
Choose the AMD Radeon RX 7900 XTX to run bigger models. Choose the AMD Radeon RX 7900 XTX for speed. Choose the AMD Radeon RX 7900 XT to spend less.
Which can run bigger models, the AMD Radeon RX 7900 XT or the AMD Radeon RX 7900 XTX?
At 128k context the AMD Radeon RX 7900 XTX runs 8 of the models we track fully in memory and the AMD Radeon RX 7900 XT 6; only the AMD Radeon RX 7900 XTX holds Gemma 4 26B-A4B.
Which is faster for local AI, the AMD Radeon RX 7900 XT or the AMD Radeon RX 7900 XTX?
On the models both run fully in memory, the AMD Radeon RX 7900 XTX is about 1.2× as fast as the AMD Radeon RX 7900 XT (estimated, median across models).
What is the price difference between the AMD Radeon RX 7900 XT and the AMD Radeon RX 7900 XTX?
In the US the AMD Radeon RX 7900 XT costs $800 at Amazon and the AMD Radeon RX 7900 XTX $1,533 at Amazon: the AMD Radeon RX 7900 XT is $733 cheaper.

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