Here are the pc specs:
HP Compaq 6200 Pro PC with:
Core I7-2600 Quat Core
500 GB HD
320 W power supply
Expansion slots include two pcie x1, one pcie x16 graphics full height slots.
We use this pc for running mapping software, and the integrated graphics take quite a beating and also steal processing power from the cp. I'd like to be able to offload the graphics processing to a really strong, really fast, really powerful graphics card with 2-4 gb of onboard memory. Maximum cost must be less than $500.00.
Does such a beast exist that will run on our mapping pc?
Your power supply is only 320 watts. Here are the cards that HP recommends for your machine http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c03058610-1&sp4ts.oid=5037949
Roughly these are about 20-40 watt cards (can't be more accurate than that without a lot of Googling and time which I can't do at present). You'd probably get a card with about 512 Mb of RAM but I wouldn't go higher than that for safety.