Strange Problem with new GTX 660 Tags: Graphics Cards Gtx Graphics Last response: January 26, 2013 3:46 AM in Graphics & Displays Share nverhoog January 25, 2013 3:11:25 AM Ok, so I bought a GTX 660 for a old system. It's specs is as follows; Asus P5Q Pro motherboard with an Intel 9450 CPU, 4 gigs DDR2 ram, and a 750 watt power supply. I installed the new video card and worked normal for about two days, then the system would no longer post. I used an old 8800 GTX in the system and then it would post like normal. So bad video card I figured, but I put the GTX 660 into a brand new system I build about a month ago, and the video card functioned like normal, it posted and played games for two days. So where is my problem? does the 660 GTX have problems with older motherboards. So I tried the 660 in all of my available pc's, older systems it would not post, newer systems it would post. any ideas?? thanks More about : strange problem gtx 660 smorizio a c 207 U Graphics card January 25, 2013 4:21:36 AM could be that the power supply went bad and cant handle the voltage load of the new card. with older mb also check that all the bios updates have been installed. m 0 l nverhoog January 25, 2013 9:06:11 PM Ok I tried a new power supply and the 660 GTX still wouldn't post, the motherboard has the most up to date firmware already m 0 l Can't find your answer ? Ask ! Get the answer smorizio a c 207 U Graphics card January 26, 2013 3:46:25 AM sounds like there a bad part on the mb. may be a weak cap where the pci bus not outputting the voltage needed to kick over the new video card. m 0 l Can't find your answer ? Ask ! Publish Related resources SolvedInstalling new Gigabyte geforce gtx 660 problem Forum SolvedI'm having problems with my new gtx 660 2gb ddr5 Forum SolvedNew evga gtx 660 causing problems? Forum SolvedBrand new GTX660 problems! Forum Strange thing about ASUS GTX 660 Forum SolvedValiant hearts the great war strange fps problem with gtx 770 Forum SolvedEVGA Gtx 660Ti SC 3GB Driver has stopped working and recovered problem Forum SolvedStrange problem with my new MSI R7 260x Forum New Graphic Card Problems GTX 660TI Forum New Zotac gtx 660 2gb amp fan problems Forum SolvedStrange problem with gtx 650ti .. Forum SolvedSuggestions on new build i5-4690k w 660gtx? Forum Solvedmy gtx 660 sc is 85 celsius not a problem? Forum SolvedNeed new monitor for GTX660 Forum Solvedi have a problem since i get gtx 660 2gb? Forum SolvedIs this a problem? - GTX 660 Higher clock than Factory when gaming Forum SolvedGTX 660 Problems Forum SolvedNew Galaxy GTX 660 won't display Forum SolvedAdding a GTX 660, what problems will i run into? Forum Very strange GTX 780 problem. Help. Forum More resources Read discussions in other Graphics & Displays categories Ati GPUs Graphics Cards Gtx HD Monitors SLI Crossfire Tuner Cards Radeon Video Diamond Multimedia Matrox Nvidia Palit PowerColor Asus Games !