Now my problem. When ever I install my GPU the PC does not power up, literaly nothing happens other than the case fans would spin for a split moment then go lifeless. This would be the same if I installed a older GPU that does not require a 6 pin power input (GeForce 8500 GT) but having my DVD drive installed also.
I found installing the 7770 with nothing else other than the SSD and ONE case fan. It does not power up.
If I installed a older GPU and nothing else, it would power up unless I installed my DVD drive.
Even without any GPUs or DVD drive installed the PC does power up, but the fans slowly get up to speed.
Is this a clear sign that my PSU is on it's way out? As far as I know the 550w is enough for this system. I have had the PSU for 18 months.
On another note. I did not have this problem before I upgraded. I also don't have any other PSU that is sufficient enough to test.