# Radeon RX 7900 XT

> OnPrem World · https://onpremworld.com/en/hardware/amd-rx-7900-xt · Last updated: 2026-10-14 · CC BY 4.0

20 GB of VRAM for $899 at launch: enough for 27B-class models and 30B MoE models at 4-bit, using ROCm or Vulkan instead of CUDA.

## Specifications

|  |  |
|---|---|
| Memory | 20 GB GDDR6 |
| Memory bandwidth | 800 GB/s |
| Power | 315 W |
| Launch | 2022-12 |
| Launch price | US$899 |
| Architecture | RDNA 3 |
| Software | ROCm / Vulkan |

## What it can run (20 GB, 8K)

Estimates, not benchmarks. See the methodology.

| Model | Parameters | Best quant | Total | tok/s (est.) |
|---|---|---|---|---|
| Gemma 4 31B IT | 30.7B | Q4_K_M | 19.8 GiB | 30 |
| Qwen3-30B-A3B (2507) | 30.5B | Q4_K_M | 19.3 GiB | 280 |
| Qwen3-Coder-30B-A3B-Instruct | 30.5B | Q4_K_M | 19.3 GiB | 280 |
| GLM-4.7-Flash (30B-A3B) | 30B | Q4_K_M | 18.7 GiB | 308 |
| Qwen3.5-27B | 27B | Q5_K_M | 19.8 GiB | 29 |
| Qwen3.6-27B | 27B | Q5_K_M | 19.8 GiB | 29 |
| Qwen3.8-27B | 27B | Q5_K_M | 19.8 GiB | 29 |
| Gemma 3 27B IT | 27B | Q4_K_M | 17.5 GiB | 34 |
| Gemma 4 26B A4B IT | 25.2B | Q5_K_M | 18.3 GiB | 207 |
| Mistral Small 3.2 24B Instruct (2506) | 24B | Q5_K_M | 18.4 GiB | 33 |
| Magistral Small 1.2 (2509) | 24B | Q5_K_M | 18.4 GiB | 33 |
| Devstral Small 2 24B Instruct (2512) | 24B | Q5_K_M | 18.4 GiB | 33 |
| gpt-oss-20b | 21B | Q6_K | 17.6 GiB | 189 |
| Phi-4 (14B) | 14B | Q8_0 | 16.6 GiB | 38 |
| Gemma 3 12B IT | 12B | Q8_0 | 13.8 GiB | 44 |
| Gemma 4 12B Unified IT | 11.95B | Q8_0 | 13.3 GiB | 44 |
| Qwen3.5-9B | 9B | FP16 | 18.4 GiB | 31 |
| Qwen3-8B | 8.2B | FP16 | 17.7 GiB | 34 |
| DeepSeek-R1-0528-Qwen3-8B | 8.19B | FP16 | 17.6 GiB | 34 |
| Llama 3.1 8B Instruct | 8B | FP16 | 17.1 GiB | 35 |
| Gemma 4 E4B IT | 8B | FP16 | 16.4 GiB | 35 |
| Llama 3.2 3B Instruct | 3.21B | FP16 | 7.7 GiB | 87 |
| Kimi K2.6 | 1000B | Doesn't fit | – | – |
| DeepSeek-R1-0528 (671B) | 671B | Doesn't fit | – | – |
| DeepSeek-V4-Flash | 284B | Doesn't fit | – | – |
| Qwen3.8-Flash-Next | 180B | Doesn't fit | – | – |
| Qwen3.5-122B-A10B | 122B | Doesn't fit | – | – |
| Mistral Small 4 119B (2603) | 119B | Doesn't fit | – | – |
| gpt-oss-120b | 117B | Doesn't fit | – | – |
| Llama 4 Scout 17B-16E Instruct | 109B | Doesn't fit | – | – |
| GLM-4.5-Air | 106B | Doesn't fit | – | – |
| Qwen3-Coder-Next (80B-A3B) | 80B | Doesn't fit | – | – |
| Llama 3.3 70B Instruct | 70B | Doesn't fit | – | – |
| Qwen3.5-35B-A3B | 35B | Doesn't fit | – | – |
| Qwen3.6-35B-A3B | 35B | Doesn't fit | – | – |
| Qwen3-32B | 32.8B | Doesn't fit | – | – |
| DeepSeek-R1-Distill-Qwen-32B | 32.76B | Doesn't fit | – | – |

## Prices

No prices recorded for this device yet.

## Frequently asked questions

### Which LLMs can the Radeon RX 7900 XT run?

With 20 GB and an 8K context, the largest models that fit include: Gemma 4 31B IT, Qwen3-30B-A3B (2507), Qwen3-Coder-30B-A3B-Instruct, GLM-4.7-Flash (30B-A3B), Qwen3.5-27B. See the full table below.

### How fast is the Radeon RX 7900 XT for local LLMs?

Generation speed is mostly set by memory bandwidth (800 GB/s). For Llama 3.1 8B Instruct at FP16, expect roughly 35 tokens/s; bigger models are slower.

### Can the Radeon RX 7900 XT run 70B models?

Llama 3.3 70B Instruct does not fit on the Radeon RX 7900 XT (20 GB), even at Q4_K_M with an 8K context.

## Sources

- https://www.amd.com/en/products/graphics/desktops/radeon/7000-series/amd-radeon-rx-7900xt.html
- https://www.amd.com/en/newsroom/press-releases/2022-11-3-amd-unveils-world-s-most-advanced-gaming-graphics-.html
- https://www.custompc.com/amd-radeon-rx-7900-xt-review
- https://rocm.docs.amd.com/en/latest/compatibility/compatibility-matrix.html