I'm going to try checking the voltages, and the timings, but neither set of ram allows me to get much further than post. The only combination thats even gotten past POST is if i mix the two, placing the Ebay (AMD) set and the UNIFOSA (Gddr2) set on seperate channels.
Edit: Well here's some interesting information. I was running my system with 4x1GB sticks before all this started. I was using 3 Crucial DDR2-800 1GB sticks with default timings of 4-4-4-12 @ 2.0V and one UNIFOSA GDDR2-800 1GB stick. This setup worked fine for me and was (mostly) stable. I tried again with all 4 sticks of the UNIFOSA GDDR2-800 2GB sticks and got into windows, but then froze. I've had problems with this ram in another machine, so i wasn't too surprised, but i was glad to have seen a POST this time. After awhile, i tried once more with the Ebay set (Link above) and got it working with 3x2GB sticks and 1x1GB stick, and the 1GB stick is the old Unifosa 1GB i had in the system from the beginning. I'm going to do some switches and see if i cant find a good 2GB stick in the UNIFOSA set i have here.