Can I Run Granite 4.2 8B on AMD Radeon RX 7900 XT?

Written by Jakub Rusinowski · Last updated September 11, 2026

Yes. Granite 4.2 8B needs 6.8 GB at 8K context (4.8 GB weights + 2 GB KV cache/overhead) at Q4_K_M and the AMD Radeon RX 7900 XT has 20 GB, leaving about 13.2 GB of headroom, at roughly 72 tok/s (estimated) with room for up to 64K of context.

See what else this hardware can run →

The numbers

Granite 4.2 8B on the AMD Radeon RX 7900 XT: VRAM by quantization

Assumes an 8K-token context with an f16 KV cache, on an estimated architecture — this model publishes no config we can read. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 20 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 7900 XT: 8K 6.8 GB · 32K 10.2 GB · 128K 23.9 GB ✗. Past 128K it no longer fits 20 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.

What to do next

Nothing to change — run it at Q4_K_M. If you want more capability, check whether the next size up also fits.

No compatible GPU? Granite 4.2 8B on 16 GB of system RAM, CPU only: runs.

Running Granite 4.2 8B on this card:

Other IBM Granite 4.2 sizes on the AMD Radeon RX 7900 XT

• Granite 4.2 30B — runs at a lower quant (20.7 GB)
• Granite 4.2 3B — runs (3.5 GB)

Granite 4.2 8B on nearby hardware

• Intel Arc B580 (12 GB) — runs
• NVIDIA GeForce RTX 4090 (24 GB) — runs

All IBM Granite 4.2 sizes on the AMD Radeon RX 7900 XT | Granite 4.2 8B model page | AMD Radeon RX 7900 XT GPU page | VRAM calculator | Check your hardware