2x Nvidia A2 vs a 3090?

I'm currently running LLM models on a desktop PC with a 3090. It's quite power hungry. I am thinking about building a new rig that is energy efficient and can be left on all the time. Nvidia A2s can be found quite cheap on eBay. If I had two that would give me 32GB of vram, and each card pulls only 60w.

My question is what kind of performance can I expect, how would two A2s performance compared to a …

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