Can I Run Nex-N2.5 Pro on NVIDIA GeForce RTX 4090?

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

Written by Jakub Rusinowski · Last updated September 8, 2026

No. Nex-N2.5 Pro needs 239.7 GB at Q4_K_M and the NVIDIA GeForce RTX 4090 has only 24 GB. No quantization we publish closes a gap that size.

The numbers

Model	Nex-N2.5 Pro
Parameters	397B (17B active)
Quantization	Q4_K_M
VRAM needed	239.7 GB
NVIDIA GeForce RTX 4090 VRAM	24 GB
Verdict	Does not fit

What to do next

Either step down to a smaller size in this family, or move to a Apple M3 Ultra (512 GB), the cheapest card we track with enough VRAM.

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Cheapest card we track with enough VRAM for Nex-N2.5 Pro:

Apple Mac Studio M3 Ultra

512 GB VRAM · 60 W board power

2026 prices are volatile — check the current listing.

Check price on Amazon

Won't fit — rent Nex-N2.5 Pro instead

Nex-N2.5 Pro needs ~240 GB but this GPU has 24 GB. Rent a 8× H100 (640 GB)-class GPU by the hour instead of buying one:

Affiliate links — we may earn a commission if you sign up, at no extra cost to you.

RunPod $23.12/hr

Rent on RunPod →

Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.

Other Nex-N2.5 sizes on the NVIDIA GeForce RTX 4090

Nex-N2.5 Max — does not fit (966.0 GB)
Nex-N2.5 mini — runs (21.1 GB)

Nex-N2.5 Pro on nearby hardware

AMD Radeon RX 7900 XT (20 GB) — does not fit
NVIDIA GeForce RTX 5090 (32 GB) — does not fit

All Nex-N2.5 sizes on the NVIDIA GeForce RTX 4090 | VRAM calculator for Nex-N2.5 Pro | NVIDIA GeForce RTX 4090 GPU page | Check your hardware