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

Name: LLM Configurator — GPU VRAM Checker
Author: LLM Configurator

Autor: Jakub Rusinowski · Ostatnia aktualizacja: 11 września 2026

Yes, but it's tight — Granite 4.2 30B at Q4_K_M needs 18.1125 GB of the AMD Radeon RX 7900 XT's 20 GB, leaving only ~1.9 GB, ~25 tok/s (est.) with room for up to 4K context.

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AMD Radeon RX 7900 XT 20GB

20 GB VRAM · 315 W board power

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AMD Radeon RX 7900 XT Specs

VRAM	20 GB
Memory Bandwidth	800 GB/s

Granite 4.2 30B on the AMD Radeon RX 7900 XT: VRAM by quantization

Quant	VRAM needed	Fits 20 GB?	Max context
F16	61.7 GB	✗ No	—
Q8_0	33.6 GB	✗ No	—
Q6_K	26.3 GB	✗ No	—
Q5_K_M	23 GB	✗ No	—
Q4_K_M	19.8 GB	✓ Yes	4K
Q3_K_M	14.5 GB	✓ Yes	16K
Q2_K	11.6 GB	✓ Yes	32K

VRAM needed assumes a 4K-token context with an f16 KV cache; “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.

IBM Granite 4.2 Sizes That Fit the AMD Radeon RX 7900 XT

Granite 4.2 30B	Q4_K_M · 18.1125 GB · ~25 tok/s (est.)
Granite 4.2 8B	Q4_K_M · 4.83 GB · ~72 tok/s (est.)
Granite 4.2 3B	Q4_K_M · 1.81125 GB · ~128 tok/s (est.)

Buy vs. rent IBM Granite 4.2

Buy the GPU

~$899

AMD Radeon RX 7900 XT · MSRP

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RTX 4090 (24 GB) class

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.

FAQ

Will IBM Granite 4.2 run on the AMD Radeon RX 7900 XT?

Yes, but it's tight — Granite 4.2 30B at Q4_K_M needs 18.1125 GB of the AMD Radeon RX 7900 XT's 20 GB, leaving only ~1.9 GB, ~25 tok/s (est.) with room for up to 4K context.

Which IBM Granite 4.2 variant fits best on the AMD Radeon RX 7900 XT?

Granite 4.2 30B at Q4_K_M quantization (18.1125 GB), estimated ~25 tokens/sec, up to 4K context.

Every IBM Granite 4.2 size on the AMD Radeon RX 7900 XT

Size	VRAM	Verdict	Speed
Granite 4.2 30B	18.1 GB	Runs	~25 tok/s
Granite 4.2 8B	4.8 GB	Runs	~72 tok/s
Granite 4.2 3B	1.8 GB	Runs	~128 tok/s

IBM Granite 4.2 on Other GPUs

IBM Granite 4.2 on NVIDIA GeForce RTX 4090

Popular Models on the AMD Radeon RX 7900 XT

VRAM Tier

Best LLMs for 20 GB VRAM

Troubleshooting

Buying Guide

Best GPU Buyer Guide 2026

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