First of i would Like to thank any one who reads this post, and to let you know that I realy apretiate you taking your time to help me solve this problem. Computer is jast build no OC 900 antec(new eddition) EVGA 790i ultra sli Q9450 yorkfild CPU 45nm DDR3 2x2GB OCZ 1600Mhz XFX 9800GTX Black Eddition GPU 950W roswill PSU 150Gb Raptor 10,000 RPM Sata/Pata Creative sound blaster platinum Vindiws Vista Ultimate With SP1 64bit Lattest Bios(P05), and driver for the board and lattest driver for he GPU 22" samsung (5mps i think) My computer crushesh and freezes with the same image on the screen without responding even to cntrl+alt+del, I have to reboot. Crushes happening when Vista logo comes up when windows loading(not always only rarely so far only maybe 7 times), During my playing of coll of duty 4, here crushes happening when game loads, after 2min game play, and after 30-90 min of game play both single and multy player. in single player 50% of the freezing occures at the same spots(maybe map is loading at thouse spots). In Age of Connan is same thing it crushesh when game load or after game loads(one thing in age of conan system will almost always freeze when i am standing in the water within 1to about 3 sec of playing). What have I done so far. -DL lates important updtes for windows vist ult (from windows update in start menue) -DL latest drivers -Replaced motherboard to another 790 ultra sli EVGA, with no luck I replace that one to Intel Extreme board.(with intel board comp would not freaze anymore, it will jast restart by itself), no luck went back to 790i EVGA ultra sli -replaced Ram to DDR3 1333Mhz Patriot 2x2gb -took of sound blaster and reinstal windows without it -replaced GPU to 9800GTX BFG -instaled vista 32 bit -new HDD Western Digital 7,200 sata, with no help got another 7,200 sata HDD -Bought Zalman 9700 with new paste -Bought Power Protecting thing APC -took off side panel put all fans on high (and put huge fan to the side of the case blowing directly at the system) -in MSconfig disable all start up programs What I am Planing on Duing -Getting old drivers and older bios -chnaging PSU -changing CPU -Puting 12,000 BTU Airconditioner on the side of the computer blowing right into system -instaling windos xp I am in great need of help :dead: I will listen to any advice and follow it precicly One more thing if you do reply, try to make your post as easy understandable as possible for a nooby person like me.