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GPU comparison
Compared on the specs that decide a purchase: memory, bandwidth, power, and which workloads each card actually fits — gaming, creative, or local models when that is the job.
Specifications verified August 10, 2026.
AMD
Radeon RX 7900 XTX
24GB VRAM · 960 GB/s
AMD
Radeon RX 9070 XT
16GB VRAM · 640 GB/s
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| Specification | Radeon RX 7900 XTX | Radeon RX 9070 XT |
|---|---|---|
| Vendor | AMD | AMD |
| Memory | Winner: 24GB | 16GB |
| Usable for a model | Winner: 24GB | 16GB |
| Bandwidth | Winner: 960 GB/s | 640 GB/s |
| Segment | consumer | consumer |
| Released | December 13, 2022 | March 6, 2025 |
| Launch MSRP | ~$999~£787 | ~$599~£472 |
| UK street price | Search Amazon UK(paid link) (opens in new tab) | Search Amazon UK(paid link) (opens in new tab) |
Local models
Computed from published VRAM and the memory each model needs at Q4, including runtime overhead.
| Model | Radeon RX 7900 XTX | Radeon RX 9070 XT |
|---|---|---|
| Qwen 3 4B4B parameters | Fits | Fits |
| Llama 3.1 8B Instruct8B parameters | Fits | Fits |
| Qwen 3 14B14B parameters | Fits | Fits |
| Gemma 3 27B27B parameters | Fits | Does not fit |
| Qwen 3 30B-A3B30B parameters | Fits | Does not fit |
| Qwen 3 32B32B parameters | Fits | Does not fit |
| Llama 3.3 70B70B parameters | Does not fit | Does not fit |
| Muse Glimmer 30B30B parameters | Fits | Does not fit |
| Mixtral 8x22B141B parameters | Does not fit | Does not fit |
| Qwen 3 235B-A22B235B parameters | Does not fit | Does not fit |
| Qwen 3 Coder 480B-A35B480B parameters | Does not fit | Does not fit |
| DeepSeek V3.2671B parameters | Does not fit | Does not fit |
Common questions
Answered from the verified figures on this page rather than general guidance.
Radeon RX 9070 XT launched lower at ~$599 against ~$999 for Radeon RX 7900 XTX. Launch MSRP is an anchor, not a live price.
Radeon RX 7900 XTX has more memory bandwidth — 960 GB/s against 640 GB/s. That usually helps high-refresh 1440p and 4K once VRAM is sufficient for your settings. Still verify with dated independent tests for the games you play.
Radeon RX 7900 XTX — 24GB usable against 16GB on Radeon RX 9070 XT. Extra memory helps texture mods, video timelines, and 3D scenes before it helps esports frame rates.
Radeon RX 7900 XTX. With 24GB usable against 16GB it additionally holds Gemma 3 27B, Qwen 3 30B-A3B, Qwen 3 32B, Muse Glimmer 30B at Q4.
Radeon RX 7900 XTX, at 960 GB/s against 640 GB/s — roughly 1.5× the memory bandwidth. Bandwidth is the practical ceiling on token throughput once a model fits, but it only matters if the model fits in the first place.
Neither. A 70B model needs about 42GB at Q4 including overhead, above both cards. The largest that fits is Qwen 3 32B on Radeon RX 7900 XTX and Qwen 3 14B on Radeon RX 9070 XT.
If one card holds a model the other cannot, that capacity difference usually outweighs a bandwidth advantage. A model that spills to system memory can be substantially slower, but the actual impact depends on the backend, transfer path, context, and workload.