Chomp Posted January 11, 2009 Share Posted January 11, 2009 Hi first time posting. My computer came w/ four matched sticks Corsair CM2X1024-6400 memory cards for a total of 4gigs of mem. The issue I'm having is with using all four sticks: I can fill dim slots 1, 2 and 3 and there are no probs but as soon as I fill the 4th slot I get probs w/ apps crashing, strange graphic glitches and flickering. I ran Vistas mem diagnostic tests and it reports a "hardware problem". I've switched mem cards and even had all four replaced but the problem persists when I put the fourth card in (dual channel mode). I looked at the QVL and it lists Corsair CM2X1024-6400C4 as a valid mem for duel channel mode. CM2X1024-6400 is close enough to CM2X1024-6400C4 right? Again if I just have slots 1,2 and 3 filled there is no issue (Vistas mem diagnostic test reports no issues). I've tried everything I can think of and poured through post as much as I can but I'm stuck. Any help would be much appreciated. Thanks Link to comment Share on other sites More sharing options...
007bont Posted January 11, 2009 Share Posted January 11, 2009 First of all make sure you have the latest bios available for your board! Insert one module and set the following values in the bios. (dont forget the save the bios!) AI Tuning = Manual Nvidia GPU Ex = Disabled LinkBoost = Disabled Extreme Tweaker Screen FSB & Memory Config[/b][indent]FSB - Memory Clock Mode = Unlinked FSB (QDR), MHz = 333(1333) MEM (DDR), MHz = 667 CPU Configuration CPU Multi = 9 CPU Internal Thermal Control = Enabled Limit CPUID MaxVal = Disabled Enhanced C1 (C1E) = Disabled Execute Disable Bit = Enabled Virtualization Technology = Enabled Enhance Intel Speedstep Tech = Disabled Chipset Memory Timing Setting tCL = 5 tRCD = 5 tRP = 5 tRAS = 15 Command Per Clock = 2 clocks Advanced Memory Settings tRRD = Auto tRC = Auto tWR = Auto tWTR = Auto tREF = Auto tRD = Auto tRFC = Auto Async Latency = Auto Voltages Vcore = Auto Vdimm (DRAM Voltage) = 2.1v 1.2v HT = 1.2v NB Vcore = 1.45v SB Vcore = 1.55v CPU VTT = 1.35v Legacy USB = Disabled for Memtest, Enabled Afterwards Run memtest to ensure dram stability. If errors occur, test each module at a time using different slots (to rule out a defective memory slot) Link to comment Share on other sites More sharing options...
Chomp Posted January 11, 2009 Author Share Posted January 11, 2009 Yes I have the latest bios (1701) and all drivers are up-to-date. I'll try your suggestion, thanks. I have one question though - why would I set the FSB to: MEM (DDR), MHz = 667 Sorry I'm not very knowledgeable about RAM. Thanks. Link to comment Share on other sites More sharing options...
007bont Posted January 11, 2009 Share Posted January 11, 2009 Chipsets can often reach high speeds, when you use 2 modules. When using more then 2 modules its suggested to lower the ramspeed a bin. in your case that would be 667, instead of 800. If you can find stability when running at 667. then you can try to reach the 800 speed. for more research, please view this topic: http://www.houseofhelp.com/v3/showthread.php?t=64360&highlight=Unpredictable+results+QUAD2X4096+Gigabyte+X38-DS5 Link to comment Share on other sites More sharing options...
Chomp Posted January 11, 2009 Author Share Posted January 11, 2009 Ok thanks. I did read that last night, guess I need more coffee. I'm thinking of just upgrading and I'm wondering if this would work well w/ my specs: Corsair Dual Channel XMS2 4096MB PC8500 DDR2 1066MHz Memory (2 x 2048MB) It's on sale and w/ just two modules I can avoid the 4th slot. Thanks. Link to comment Share on other sites More sharing options...
DerekT Posted January 12, 2009 Share Posted January 12, 2009 That's the far better way to go. Ok thanks. I did read that last night, guess I need more coffee. I'm thinking of just upgrading and I'm wondering if this would work well w/ my specs: Corsair Dual Channel XMS2 4096MB PC8500 DDR2 1066MHz Memory (2 x 2048MB) It's on sale and w/ just two modules I can avoid the 4th slot. Thanks. Link to comment Share on other sites More sharing options...
007bont Posted January 12, 2009 Share Posted January 12, 2009 :withstupi ;): Link to comment Share on other sites More sharing options...
Chomp Posted January 14, 2009 Author Share Posted January 14, 2009 Ok memory is on its way. The dual channel modules go into dimm A1 and A2 right? Or is it dimm A1 and B1? Link to comment Share on other sites More sharing options...
007bont Posted January 14, 2009 Share Posted January 14, 2009 http://www.houseofhelp.com/v3/attachment.php?attachmentid=5025&stc=1&d=1231961972 ;): Link to comment Share on other sites More sharing options...
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