That board has Q963 chipset and 1 pci-e slot. I would think it should work, but the instructions state.
* The dc5700 supports Normal (or Non-reversed) layout ADD2 (Advanced Digital Display 2) adapter cards inserted into the SDVO (Serial Digital Video Output) connector on the system board. This connector has the physical appearance of a PCIe x16 connector; however, conventional PCIe cards are not supported in this connector.
** Rear audio ports are re-taskable as Line-in, Line-out, or Microphone-in.
I dont know what this means? I have never heard of a ADD2 slot but it sounds like junk to me.
My DC5800 has a normal Q33 chipset and a normal PCI-e port. I dont think you can add a video card to the DC5700. The HP documentation states that the add in video cards for that computer are PCI-e 1x or PCI.
Yes PCI cards will work. The HP docs had some PCI cards listed as options. The HD5450 that I listed above would be like 3 or 4 times faster. So it should work a little better but still might bot be enough for games.
Hotline miami is listed as needing a DX8 card with 32 megs of video ram. The PCI HD6450 should run it pretty nicely.