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  #1  
Old 07-14-2007, 11:34 PM
keithro keithro is offline
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Default Settings for P6N and 2 sets of Twin2X2048-8500C5D

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
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  #2  
Old 07-18-2007, 08:08 PM
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RAM GUY RAM GUY is offline
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With 4 modules I would suggest leave the timings and frequency set to AUTO and set the memory Voltage to 2.1 Volts.
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  #3  
Old 07-19-2007, 10:26 AM
keithro keithro is offline
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Big Grin UPDATE: new bios seems to have helped

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/sh...ad.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
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  #4  
Old 07-19-2007, 04:37 PM
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RAM GUY RAM GUY is offline
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Thank you for letting me know!
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