Hi guys, I am almost sure this is problem is because my PSU is not powerful enough. But I wanted to get some input.
I have a ASUS P5AD2 mobo, 3.2GHz intel presccott HT, 1GB ram, 1 SATA HD 1 IDE HD 1 DVDRW 1 CDRW.
As you can see its a pretty loaded system. I have a 480w PSU.
I just got my x1900xt today and I install it and I go to turn on the computer and the thing wont start. I read the requirements and it says at least a 450w PSU so I thought I was ok. I had to buy the adapter for the video card because I did not have a native 6pin PCI-Express power connecter in my PSU.
I think it is the PSU because when I go to turn it on, the CPU heatsink fan twitches but the thing just wont turn over and boot. I think its just too much for the PSU to handle. Ive tried unplugging everything except the harddrive I need to boot, the graphics card, and the mobo, (the bare essentials) and still have not had any luck to get the thing to start.
If i disconnect the PCI-E adapter that I bought (that converts the 2 x 4pin molexs into the 1 6pin connecter) and leave the vid card in the slot, the system does turn over. I didnt leave it on long enough to see if it POSTs, but it gets further than dead
What was your previous GPU? Are you OCing? IMO, your orig PSU should have been able to power your rig. Are you sure that all of the power cables are seated properly? The video card is seated properly? Try booting with minimal hardware and then adding components one at a time. Monitor voltages after every successful boot and then let us know what your readings/results are.
The PSU you've ordered will definitely power your rig - it should power two rigs with those specs...