Questions about bad framerate, rating my rusty rig and affordable graphics cards

[mack]

Even if you upgrade your PSU, your PC still probably doesn't have a PCI Express slot. I don't even think AGP Cards exist anymore.

 

[Muffin Man]

HP Compaq dc7600 Small Form Factor PC*-* HP Compaq Business Desktop dc7600 Small Form Factor - Overview - c00376254 - HP Business Support Center

PCI Express x16 slot: 1 low-profile (2.5 inches), length (6.6 inches)

we wouldn't suggest anything if it wasn't compatible

 

[mack]

I did say "probably", as I wasn't sure if it had it or not. Either way, the computer is pretty outdated. I suggest a new MB, CPU, and RAM. Upgrading that computer isn't worth it.