What models can the AMD Radeon RX 7900 XT run?

With 20GB of VRAM it can run models up to roughly 30B parameters at a 4-bit quantisation, or smaller models with more context. Use the hardware matrix for specifics; these figures are approximate.

How much power does the AMD Radeon RX 7900 XT draw?

About 315W under load, so pair it with a power supply that has real headroom.

AMD Radeon RX 7900 XT

Name: AMD Radeon RX 7900 XT
Brand: AMD

AMD · High-end

An RDNA 3 consumer card with 20GB of memory on a 320-bit bus, offering more VRAM and bandwidth than similarly-priced 16GB NVIDIA cards.

Specifications

VRAM	20GB
Memory bandwidth	800 GB/s
Power draw	315W
Type	gpu

A high-end consumer card with good VRAM-per-pound, if ROCm covers your tools. Verify current pricing.

AMD Radeon RX 7900 XT: common questions

What models can the AMD Radeon RX 7900 XT run?: With 20GB of VRAM it can run models up to roughly 30B parameters at a 4-bit quantisation, or smaller models with more context. Use the hardware matrix for specifics; these figures are approximate.
How much power does the AMD Radeon RX 7900 XT draw?: About 315W under load, so pair it with a power supply that has real headroom.

Strengths

20GB gives more headroom than 16GB rivals at a comparable price
800 GB/s bandwidth is high for a consumer card, helping generation speed
ROCm and Vulkan back-ends make it viable for LLM and image work

Weaknesses

ROCm support lags CUDA in breadth, stability, and day-one compatibility
A 315W draw and no ECC
Some inference tools run best on NVIDIA and need extra setup on AMD

See what models fit in 20GB →

Entry last verified 18 August 2026. Specifications and especially prices change; verify before buying.