Can I Run InternLM 3 on AMD Radeon RX 7900 XT?

Written by Jakub Rusinowski · Last updated July 12, 2026

Yes, comfortably — InternLM 3 20B Instruct at Q4_K_M needs 14.5 GB at 8K context (12.1 GB weights + 2.4 GB KV cache/overhead), leaving ~5.5 GB of the AMD Radeon RX 7900 XT's 20 GB, at ~35 tok/s (est.), with room for up to 32K context.

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Buy this hardware AMD Radeon RX 7900 XT 20GB — 20 GB VRAM · 315 W board powerDeploy in the cloud now RTX 4090 on RunPod — from $0.34/hr · rate checked 2026-07

or compare on Vast.ai from $0.35/hr (typical low · varies)

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AMD Radeon RX 7900 XT 20GB
20 GB VRAM · 315 W board power
2026 prices are volatile — check the current listing.
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AMD Radeon RX 7900 XT Specs

VRAM20 GB
Memory Bandwidth800 GB/s

InternLM 3 20B Instruct on the AMD Radeon RX 7900 XT: VRAM by quantization

QuantVRAM neededFits 20 GB?Max contextWhole PC
F1642.4 GB✗ No——
Q8_023.6 GB✗ No—Build for this
Q6_K18.8 GB✓ Yes8K—
Q5_K_M16.6 GB✓ Yes16K—
Q4_K_M14.5 GB✓ Yes32KBuild for this
Q3_K_M10.9 GB✓ Yes32K—
Q2_K9 GB✓ Yes32K—

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 14.5 GB · 32K 19.2 GB. Every window this model publishes still fits 20 GB.

No compatible GPU? InternLM 3 20B Instruct on 24 GB of system RAM, CPU only: runs.

InternLM 3 Sizes That Fit the AMD Radeon RX 7900 XT (at 8K context)

InternLM 3 20B InstructQ4_K_M · 14.5 GB at 8K context · ~35 tok/s (est.)
InternLM 3 8B InstructQ4_K_M · 6.5 GB at 8K context · ~71 tok/s (est.)
Buy vs. rent InternLM 3
Buy the GPU
~$899
AMD Radeon RX 7900 XT · MSRP
Rent by the hour
from $0.34/hr
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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RunPod $0.34/hr
Rent on RunPod →
Vast.ai $0.35/hr · typical low · varies
Rent on Vast.ai →

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

FAQ

Will InternLM 3 run on the AMD Radeon RX 7900 XT?

Yes, comfortably — InternLM 3 20B Instruct at Q4_K_M needs 14.5 GB at 8K context (12.1 GB weights + 2.4 GB KV cache/overhead), leaving ~5.5 GB of the AMD Radeon RX 7900 XT's 20 GB, at ~35 tok/s (est.), with room for up to 32K context.

Which InternLM 3 variant fits best on the AMD Radeon RX 7900 XT?

InternLM 3 20B Instruct at Q4_K_M quantization needs 14.5 GB at 8K context (12.1 GB weights + 2.4 GB KV cache/overhead), estimated ~35 tokens/sec, up to 32K context.

Every InternLM 3 size on the AMD Radeon RX 7900 XT

SizeVRAM at 8KVerdictSpeed
InternLM 3 20B Instruct14.5 GBRuns~35 tok/s
InternLM 3 8B Instruct6.5 GBRuns~71 tok/s

InternLM 3 on Other GPUs

Popular Models on the AMD Radeon RX 7900 XT

VRAM Tier

Troubleshooting

Buying Guide

← Can I Run It? | InternLM 3 Model Page | AMD Radeon RX 7900 XT GPU Page | VRAM calculator | Check Your Hardware