HP are usuallly OEM printed circut board Design, though there are a few modular ones out there (never seen one, but heard of them)
Honestly?
You can go bid on used Computers on E-bay of Gaming quality for less then it would cost to upgrade an HP (assuming it's a modular one)
I myself got 4 "Gaming Quality" Optiplex Gx400 Dells from Ebay at $129 eachs...and considering just the Nvidia in them retailed for $269, and the Zip Drive is $169, and the software included...anyways it was a "Bargin" and they are formally University of Maryland CIT Lab Computers so they were well taken care of and upgraded over the years to there current state (the Floppy drive kills me as much as the zip drive...Who uses floppy disks any more?)
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