Radeon RX 7800 XT: 16GB VRAM — What Local LLMs Can It Run?
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The Radeon RX 7800 XT has 16GB of GDDR6 memory with 624 GB/s of bandwidth. No used-price data yet. At Q4 quantization it runs models up to 14B parameters at roughly 35 tokens/s.
Full Radeon RX 7800 XT specifications
What LLMs can the Radeon RX 7800 XT run?
One reference model per family (its main version)| Model | Q4_K_M | Q8_0 | FP16 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Fits | Speed t/s | Context | Fits | Speed t/s | Context | Fits | Speed t/s | Context | |
| DeepSeekDeepSeek R1 Qwen3 8B | ✓ | 56.9 | 32K | ✓ | 32.9 | 32K | ✗ | — | — |
| GemmaGemma 4 31B | ✗ | — | — | ✗ | — | — | ✗ | — | — |
| GLMGLM 4.7 Flash | Offload | 36 | — | Offload | 21 | — | Offload | 11.7 | — |
| gpt-ossgpt-oss 20B | ✓ | 89.5 | 32K | Offload | 16.1 | — | Offload | 8.9 | — |
| KimiKimi Linear 48B A3B | Offload | 41.4 | — | Offload | 24.1 | — | Offload | 13.4 | — |
| LlamaLlama 3.1 8B | ✓ | 58.6 | 32K | ✓ | 33.7 | 32K | ✗ | — | — |
| MistralMistral 7B v0.3 | ✓ | 63.9 | 32K | ✓ | 37 | 32K | ✗ | — | — |
| QwenQwen3 8B | ✓ | 56.9 | 32K | ✓ | 32.9 | 32K | ✗ | — | — |
Fits when weights + KV cache + runtime overhead is at or below usable memory, single card. "Offload" on MoE models means it runs with expert weights in system RAM (only attention layers and KV cache stay in VRAM); that speed assumes 70 GB/s RAM bandwidth. The context column is the largest tier that fits.
Radeon RX 7800 XT used price history
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FAQ
How much VRAM does the Radeon RX 7800 XT have?
The Radeon RX 7800 XT has 16GB of GDDR6 memory with 624 GB/s of bandwidth.
Can the Radeon RX 7800 XT run a 70B model?
Not on a single card. At Q4_K_M with an 8K context a 70B dense model needs about 43GB, more than the Radeon RX 7800 XT's 16GB.
How much does a used Radeon RX 7800 XT cost?
No used-price data yet; it will appear here once the feed is live.