Written by Jakub Rusinowski · Last updated September 11, 2026
Yes. Granite 4.2 3B needs 1.8 GB at Q4_K_M and the AMD Radeon RX 7900 XT has 20 GB, leaving about 18.2 GB of headroom, at roughly 128 tok/s (estimated) with room for up to 128K of context.
| Model | Granite 4.2 3B |
| Parameters | 3B |
| Quantization | Q4_K_M |
| VRAM needed | 1.8 GB |
| AMD Radeon RX 7900 XT VRAM | 20 GB |
| Verdict | Runs |
| Max context | 128K |
| Estimated speed | ~128 tok/s |
Nothing to change — run it at Q4_K_M. If you want more capability, check whether the next size up also fits.
Running Granite 4.2 3B on this card:
At 2 hrs/day, buying (~$899) beats renting at $0.34/hr after about 3.7 years.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
All IBM Granite 4.2 sizes on the AMD Radeon RX 7900 XT | VRAM calculator for Granite 4.2 3B | AMD Radeon RX 7900 XT GPU page | Check your hardware