I recently bought a SATA host controller card but it is not working in my computer. I don't think it has anything to do with the drivers in windows because when I go into the bios setup it sees everything except the SATA controller and the hard drive I plugged into it. I have tried it in four different PCI slots, checking connections each time and none of them are working. My computer is fairly old, so I thought perhaps the card was incompatible with the slots, but it’s PCI rev 2.2 and so is the USB port card that I bought at the same time and it's working perfectly. I’ve run out of ideas and I’m not sure what to do next to try fixing the problem. Any help would be greatly appreciated. The SATA controller card is a Syba sd-sata2-4ir, and my computer is a Compaq Deskpro EN P933, with a Pentium 3 processor and 512 MB of RAM.