keithro Posted July 15, 2007 Share Posted July 15, 2007 Hi, I've got an MSI P6N SLI Platinum with a Core 2 Duo E6420 that is having trouble when I add 4GB of ram. 2GB seems to be fine but when I push it to 4GB I get problems. I'm wondering what my BIOS settings should be for 4GB. Here's the BIOS says for... Current CPU Core Frequency: 2148MHz Current FSB Frequency: 1067 MHz Current DRAM Frequency: 800 MHz Here are the options available to me in the MSI BIOS for Memory timings: tCL tRP tRAS tRRD tRC tWR tWTR tREF Command Per Clock I also have these voltage settings available: Memory Voltage NB Voltage SB Voltage FSB VTT Voltage Thanks in advance Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted July 19, 2007 Corsair Employee Share Posted July 19, 2007 With 4 modules I would suggest leave the timings and frequency set to AUTO and set the memory Voltage to 2.1 Volts. Link to comment Share on other sites More sharing options...
keithro Posted July 19, 2007 Author Share Posted July 19, 2007 After Googling the issue, I noticed that others were seeing the same effects (i.e. memory > 4Gb == slowdown). On the MSI forums there's even an unofficial bios version (1.32) that claims to fix the problem. Before trying something as drastic as flashing with an unofficial bios, I flashed with the latest and greatest official version (i.e. 1.30) from MSI and the problem seems to have disappeared. I will, however, try your suggestion of 2.1v for the memory. Also, based on this (http://www.houseofhelp.com/forums/showthread.php?t=54052) post, I tried to manually fill in what my timings should be. Unfortunately, I can't seem to match up "tRCD" (Row Address to Column Address Delay) because my BIOS doesn't have it. Do these settings look accurate? tCL = 5 tRP = 5 tRAS = 15 tRRD = auto <-- Row Active to Row Active Delay tRC = auto <-- Row Cycle Time tWR = 5 tWTR = auto <-- Internal Write to Read Command Delay tREF = auto <-- refresh rate of the DIMM requiring the most frequent refresh Command Per Clock = 2T Thanks Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted July 19, 2007 Corsair Employee Share Posted July 19, 2007 Thank you for letting me know! Link to comment Share on other sites More sharing options...
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