Specs update... Power supply says 800w  I currently use 2 older 23" LGs at1920x1080 and I would move them to the z800

I cant afford new monitors yet as I am just a retired so and so 

800 is sort of pushing it and the lowest the Z800 ever came with stock was 850 for a headless setup. Depending on the number of hard drives you have and the type/rpm, 800 wont cut it with a decent GPU. The R280 would do fine for what you want, and I would not put a card in it with less than 3 gig. I would also consider a 1000+ watt gold power supply as well. You will spike close to (or possible over 800) once you put a GPU in it. Pushing any supply to max output is asking for trouble.

One thing that you need to keep in mind with a system that draws that much is what else you have on the same circuit in your house. Things like laser printers should be on another circuit. You should have a backup power supply on the workstation as well.

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