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AMD Radeon RX 7800 XT vs AMD Radeon RX 9070 XT

For running models locally, priced in India. At 128k context the first runs 5 models fully in memory, the second 5.

In short

Both have 16 GB of memory for models; the AMD Radeon RX 7800 XT has 624 GB/s of bandwidth and the AMD Radeon RX 9070 XT 640 GB/s. At 128k context both run the same 5 models we track fully in memory. On the models both run fully in memory, the AMD Radeon RX 7800 XT and the AMD Radeon RX 9070 XT are about as fast as each other (estimated).

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

AMD Radeon RX 7800 XT

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AMD Radeon RX 9070 XT

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Specifications

SpecAMD Radeon RX 7800 XTAMD Radeon RX 9070 XT
GPURadeon RX 7800 XTRadeon RX 9070 XT
Memory16 GB GDDR616 GB GDDR6
Memory bus256-bit256-bit
Memory bandwidth624 GB/s640 GB/s
FP16 compute74 TFLOPS195 TFLOPS
SoftwareROCmROCm
Board power263 W304 W
PCIe generationGen 4Gen 5
PCIe lanesx16x16

What each runs

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

ModelAMD Radeon RX 7800 XTAMD Radeon RX 9070 XT
Gemma 4 12B28tok/sQ6_K29tok/sQ6_K
Qwen 3.5 9B25tok/sQ8_025tok/sQ8_0
Qwen 3.5 4B39tok/sQ8_040tok/sQ8_0
Gemma 4 E4B29tok/sQ8_029tok/sQ8_0
LFM2.5 8B-A1B28tok/sUD-Q6_K29tok/sUD-Q6_K
Qwen 3.8 27Boffloadoffload
Qwen 3.6 27Boffloadoffload
Gemma 4 31Boffloadoffload
Qwen 3.6 35B-A3Boffloadoffload
Qwen 3.5 27Boffloadoffload
Gemma 4 26B-A4Boffloadoffload
Qwen 3.5 35B-A3Boffloadoffload
GLM 4.7 Flashoffloadoffload
Devstral Small 2 24Boffloadoffload
Nemotron 3.5 Lightning 30B-A3Boffloadoffload
gpt-oss 20Boffloadoffload
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
Llama 3.1 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
Qwen 3.5 122B-A10Bwon'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
Mistral Small 4 119Bwon'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 can run bigger models, the AMD Radeon RX 7800 XT or the AMD Radeon RX 9070 XT?
At 128k context both run the same 5 models we track fully in memory.
Which is faster for local AI, the AMD Radeon RX 7800 XT or the AMD Radeon RX 9070 XT?
On the models both run fully in memory, the AMD Radeon RX 7800 XT and the AMD Radeon RX 9070 XT are about as fast as each other (estimated).

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