Can I Run IBM Granite 4.1 on NVIDIA GeForce RTX 4090?

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

Written by Jakub Rusinowski · Last updated April 29, 2026

Yes, comfortably — you'll have ~6 GB of headroom running Granite 4.1 30B at FP8 (Q4 est. ~12-15GB, unconfirmed) (18 GB, ~56 tok/s (est.)).

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Check price on Amazon — NVIDIA GeForce RTX 4090 24GB

NVIDIA GeForce RTX 4090 Specs

VRAM	24 GB
Memory Bandwidth	1008 GB/s

Granite 4.1 30B on the NVIDIA GeForce RTX 4090: VRAM by quantization

Quant	VRAM needed	Fits 24 GB?	Max context
F16	70.4 GB	✗ No	—
Q8_0	42.3 GB	✗ No	—
Q6_K	35 GB	✗ No	—
Q5_K_M	31.7 GB	✗ No	—
Q4_K_M	28.5 GB	✗ No	—
Q3_K_M	23.2 GB	✓ Yes	4K
Q2_K	20.3 GB	✓ Yes	4K

VRAM needed assumes a 4K-token context with an f16 KV cache; “Max context” is the largest window that still fits in 24 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.

IBM Granite 4.1 Sizes That Fit the NVIDIA GeForce RTX 4090

Granite 4.1 30B	FP8 (Q4 est. ~12-15GB, unconfirmed) · 18 GB · ~56 tok/s (est.)
Granite 4.1 8B	Q4_K_M · 5 GB · ~202 tok/s (est.)
Granite 4.1 3B	Q4_K_M · 2 GB · ~400 tok/s (est.)

Buy vs. rent IBM Granite 4.1

Buy the GPU

~$1,599

NVIDIA GeForce RTX 4090 · MSRP

Rent by the hour

from $0.34/hr

RTX 4090 (24 GB) class

At 2 hrs/day, buying (~$1,599) beats renting at $0.34/hr after about 6.5 years.

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