Just built the following system:
Apacer Giant II 2x2gb 1800mhz ram
Cougar 650watt psu
WD caviar blue 1tb sata3
First time i booted it up it worked flawlessly, but I didnt use the pc much.
Next morning (second time turning it on), it froze while booting on the bios load screen (gigabyte graphic with white background). I pressed the reset button, and it rebooted perfectly all the way into windows etc. Turned it off after playing around with it for a while.
Few hours later, I turned it on and the fans spin up, LED's on the mobo light up, and then about 2 seconds later it reboots before getting any further. It then gets stuck in this reboot cycle, only 'booting up' for about 2-3 seconds each time.
I checked all connections inside, ram, fans, etc. Turned psu off and on many times, tried using different wall sockets etc.
But ive still got the same problem. What could be causing this?? The thing is that it worked normally on the first boot, then had a bit of a hiccup on the second boot but still managed to boot up fully after resetting, but then from attempt no.3 to attempt no. 50 it just gets stuck in this cycle!
I didnt change any hardware, settings etc. I didnt open the case, or plug in anything additional after the first successful boot. The PC was basically untouched, other than changing the wallpaper etc
All Cougar PSUs are made by HEC. The only one I'm aware of that fits that description "650W" is a Zephyr, which I don't have any good reviews on. The newer Cougars have been properly reviewed and are good.
HEC should not be fully trusted for PSUs just yet.