Published October 5, 2026by BradOh

16gb vram but OLD card - any way I can pump this GPU up?

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musing

While I am lucky to have a 3090 at home, my work laptop has a Quadro P5200 with 16gb vram, die based on GP104, almost a gtx1080. Old but can still generate. XL is nice and nippy but Krea is sluggish to say the least when it doesn't OOM.

I've attempted to use various attentions but had no luck with sageattn, flashattn, flash-legacy or kitchenattn... xformers works but I am wondering if there is anything else I might be able to add to my install? (Forge Neo). Pytorch 2.7, cu128. Or any advice on utilising the gpu with anything optimised for this era of card for SD.

Thanks in advance, any positive insight is greatly appreciated, I have spent days tweaking (or attempting to and failing), my limited knowhow is exhausted!

ADDED Oct 7th. Some tests using variants.

FORGE NEO

Quadro P5200 16gb Vram, 32gb ram

qwen3vl_4b_fp8_scaled.safetensors - text encoder

Qwen2D_VAE.safetensors - VAE

Xformers 0.0.30

1024x768

Prompt, no loras, "dog on the beach"

completion:

GGUF Q5

Time taken: 5 min. 6.5 sec.

NVFP4

Time taken: 4 min. 48.8 sec.

GGUF Q4

Time taken: 4 min. 41.6 sec

W4A8_convrot

Time taken: 2 min. 6.3 sec.

INT8_CONVROT

Time taken: 1 min. 26.1 sec.