Hiya, today i finished putting together my pc (budget) My case has a 450w Power Unit -ASRock 775DUAL-VSTA SKT 775 VIA PT880Pro/ultra motherboard -Point Of View 7600GT 256mb DDR3 PCI-E -1.280GB DDR Ram (not sure which brand) -Intel Celeron D 356 (3.33GHz)Processor -80Gb Maxtor Hardrive -Sony Dvd Drive (Not sure what model) For some unknown reason when I turn pc on, its ok for a few seconds then it just goes off for no reason. Its highly frustrating=( The motherboard, graphics card and processor are brand new, the memory, dvd drive and harddrive are from my dell pc and they have never failed me before. The case has fans and there is an heatsink/fan on the processor so i dont think heat is a problem and the pc is only on for a few secs so overheating is out of question basically. Ive made sure everything has power to it, and sometimes it goes for around 20 secs,on the screen it says my graphics card, also mentions my memory and processor, and it detects both my hard disk and dvd drive so im assuming nothing is wrong with them since the motherboard detects them. Please could someone help me, this is my first pc which ive put together myself and I really want it finished! Thank you so much to anyone who helps.