Hello All Like so many that do post here i am at my wits end. Recently i bought a new PC that i wanted to build on my own. (Like many times before) The Things i bought were these: Tower: Lankool K58 Harddiscs: 1. Samsung SSD 470 2. Seagate Baracuda 7.2 Processor : Intel Core I5 2500K Processorcooler: Enermax ETS-T40-TB Mainboard: Asrock z68 Pro3 RAM: 2x Kingsston HyperX DDR-1600 PSU: Xigmatek GoGreen NRP-PC702 700W Errors: -First Randomly loosing Power and Powering Up again -Now No Graphics Sometimes no USB, Didn't know if Powerproblem is solved Graphiccard: (Changed but the first Time i Powered the PC up it was a Asus Radeon EAX300SE-X/TD) some Cheap 128MB Exact History of what i did: So after i put the parts together, i started the PC up and all was fine. I installed Win 7 and so on. Suddenly my PC shuts himself down. And tries to start up again. I found it weird but since it was OK after that i didn't think anymore about it. Until he did it again at first i thought well its because the CPU is too hot so i ran a few benchmarks and monitored the CPU heat but it was constantly around 45° Celsius about 113 ºF. So i checked every cable if it had some kind of loose contact but it seemed fine. I did switch out the Ram and tried with only one ram module. to the same end. Which lead me to the conclusion that either the PSU or the Mainboard is at fault. Meanwhile the problem became worse i couldn't even start the PC up anymore without him loosing power. and suddenly he only sprang into bios without going to try to boot from the harddiscs so i concluded that it was the mainboard because he also couldn't find the harddiscs in bios anymore. I got a cheap mainboard from the place where i work to check my hunch (Asus P8H61-M). But the PC still made the same error except the PC didn't shut down quite so fast anymore ( could start up Win again). Meanwhile I also got the last part for my PC the new Graphiccard Gigabyte Geforce GTX580. Today I got a PUS from a colleague of mine to check out my PSU.)His PSU is a Coolermaster Silent Pro Gold 800W).But now i cant see any Graphics anymore if i try to Start my PC, well there were two out of the 10 times i tried when i saw some Graphics but the USB didn't work so i couldn't do anything with the mouse now the usb works but the graphics don't anymore. Does someone have an Idea and can help me i am desperate. Sorry for the Wall of text but i tried alot. I don't Think i made a mistake while building the PC i Had 2 collegues of mine doublecheck it Thanks for reading. Regards Centum
