marv Posted April 28, 2009 Share Posted April 28, 2009 bought a new gigabyte board, a phenom 2 940, and 8 gigs of ram--won't work at 1066mhz with 8 or 4 gigs of memory. when i got everything up and running, i noticed that the board defaulted to 800mhz with 8 gigs installed. no problem. i installed vista home premium x64 and was very pleased and surprised at the speed at which it installed. i had absolutely no problems with the install and subsequently running the operating system. the first thing i did after the os install was to update the board bios. still no problems, that is until i tried to set the speed to the 1066mhz settings. no sooner than when i rebooted and logged into windows, i got the first (of many) bsod's. went back to the bios set the memory controller to ganged (unganged is the default). rebooted and bsod. back to bios. changed ram timings to epp-reboot-bsod. i overlooked the fact that i had not upped the voltage to epp rating at first, so i set the voltage to 2.1v, had the timings to 5-5-5-15-2t-22 and mem controller to unganged-reboot-bsod. grabbed my laptop and scoured many different forums for help. one commonality i saw with everyone running a phenom 2 was that the overwhelming majority of users had only 4 gigs of ram and had reported their ram ran flawless at 1066mhz. ok, i removed two sticks, double checked all of my ram timings--all good--and went for a clean install. i must say that it loaded faster than with the 8 gigs--seriously. when windows finally loaded and i logged in, the computer ran in a blur! it was incredibly fast! started loading applications... got about 15 apps loaded and bingo--bsod! i'm lost. i fire up memtest86+ and check each stick--all check good. so i tucked my tail, installed all four sticks, went into bios and set the ram to jdec#2: 800mhz, 5-5-5-18-2t-24, mem controller unganged and voltage to 1.8v. (computer runs flawlessly at jdec#2 settings--not one bsod at anytime to date. computer is fast and snappy, but nowhere near how it ran for its "15 minutes of fame" with the 4 gigs @ 1066 at epp settings. i dream for that speed. i wouldn't even mind if i had to cut back to 4 gigs for the computer to run at 1066--as long as it would run at 1066 stable) what went wrong? and i want to add that the majority of the bsod's were page fault errors (i only kept the stop codes long enough for me to research them otherwise i would have provided them here). there were a few system service exception and irq not less or equal errors too. everything was pointing to my hardware and as i stated, i did run memtest86+ (2.11). oh, and one other thing, sorry about the mix up, but the ram i have is twin2x4096-8500c5, not c5d. (did i just buy modules that aren't fully compatible with my board? after posting this post, i rechecked the board's qvl for ram and it has the 'c5d' modules listed in 1 & 2 gig capacities--those were the only modules listed, not the 8500c5) Link to comment Share on other sites More sharing options...
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