Can I Run Cogito v1 32B on AMD Radeon RX 7800 XT?
作者： Jakub Rusinowski · 最后更新： 2026年9月29日
Not at Q4_K_M — that needs 22.3 GB at 8K context and the AMD Radeon RX 7800 XT has 16 GB. Drop to Q2_K and it fits in 13.5 GB, with up to 16K of context.
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The numbers
| Model | Cogito v1 32B |
| Parameters | 32B |
| Quantization | Q4_K_M |
| VRAM needed (8K context) | 22.3 GB |
| AMD Radeon RX 7800 XT VRAM | 16 GB |
| Verdict | Runs at a lower quant |
| Fits at | Q2_K (13.5 GB) |
| Max context | 16K |
Cogito v1 32B on the AMD Radeon RX 7800 XT: VRAM by quantization
| Quant | VRAM needed | Fits 16 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 66.9 GB | ✗ No | — | — |
| Q8_0 | 36.9 GB | ✗ No | — | — |
| Q6_K | 29.2 GB | ✗ No | — | — |
| Q5_K_M | 25.6 GB | ✗ No | — | — |
| Q4_K_M | 22.3 GB | ✗ No | — | — |
| Q3_K_M | 16.6 GB | ✗ No | — | — |
| Q2_K | 13.5 GB | ✓ Yes | 16K | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 16 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the AMD Radeon RX 7800 XT: 8K 22.3 GB ✗ · 32K 28.7 GB ✗ · 128K 54.5 GB ✗. Past 8K it no longer fits 16 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Quantize to Q2_K. That is the cheapest fix — it costs some quality but no money.
No compatible GPU? Cogito v1 32B on 32 GB of system RAM, CPU only: runs comfortably.
Running Cogito v1 32B on this card:
Cogito v1 32B needs ~22 GB but this GPU has 16 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
Other Cogito v1 sizes on the AMD Radeon RX 7800 XT
- Cogito v1 70B — does not fit (45.7 GB)
- Cogito v1 14B — runs (10.9 GB)
- Cogito v1 8B — runs (6.7 GB)
- Cogito v1 3B — runs (3.6 GB)
Cogito v1 32B on nearby hardware
- Intel Arc B580 (12 GB) — does not fit
- AMD Radeon RX 7900 XT (20 GB) — runs at a lower quant
All Cogito v1 sizes on the AMD Radeon RX 7800 XT | Cogito v1 32B model page | AMD Radeon RX 7800 XT GPU page | VRAM calculator | Check your hardware