When I was cleaning it out, I looked at the motherboard and noticed that it had a 1x PCIe slot ... I then looked up a little and noticed that it was not an AGP port at all, but a PCIe 16x slot. This computer was newer then I was expecting for sure, so I'm pretty happy that my sister decided to let it go. I thought that this computer was 6 years old, apparently it's more in the range of 2 years old.
My source is CPUID & the top of the chip, CPUID reports "Intel Pentium 4 524", the top of the chip just's reports that it's an Intel Pentium 4. So, they both agree, and yes it's a "Socket 775 LGA (0x4)."
Apparently PCI Express has just gone 3.0. As pretty much everything about this computer is behind the times, I really can't say that I'm to bothered about having a PCIe 2.0 card in a PCIe 1.0 board. When I build my next computer, I'll use the card as a stop gap upgrade before I get the full on burn your face off graphic card.