ronin4740 Posted October 20, 2007 Share Posted October 20, 2007 I purchased the MB and two packs of CM2X1024-6400C4 RAM to bring the total memory of the system to 4GB. I've installed WinXP x64 so I can utilize all of the available memory and will purchase x64 Vista Ultimate to do the same. My question is: The SPD on the RAM seems to indicate that if I bump the voltage up to 2.1v and set the BIOS to detect memory settings by SPD the timings should change to 4-4-4-12-22-2T @ 400MHz. This does not occur. It's not a big deal to me if I'm limited to 5-5-5-18-22... Also with the default FSB for the Processor (Intel Core 2 Duo E6750) the RAM is slightly overclocked... Another question is that I've read that going with 4 sticks of 1GB RAM can cause some stability issues vs. going with 2 sticks fo 2GB RAM. Should I exchange the RAM I've purchased for 2GB sticks? Thanks, Ronin Link to comment Share on other sites More sharing options...
DerekT Posted October 20, 2007 Share Posted October 20, 2007 The SPD on the RAM seems to indicate that if I bump the voltage up to 2.1v and set the BIOS to detect memory settings by SPD the timings should change to 4-4-4-12-22-2T @ 400MHz. This does not occur. It's not a big deal to me if I'm limited to 5-5-5-18-22... Also with the default FSB for the Processor (Intel Core 2 Duo E6750) the RAM is slightly overclocked... Often it is best to set the DRAM timing manually in the boards. If you are memtest stable with 4 X 1024 at the DRAMs full speed, then you are doing very well indeed as most often one needs to drop the DRAM bandwidth to find stability when populating all four DRAM banks. I would download memtest from http://www.memtest.org, burn the ISO image to optical disk, boot to the optical disk and test for a few full passes to be certain that you are stable. Results? Another question is that I've read that going with 4 sticks of 1GB RAM can cause some stability issues vs. going with 2 sticks fo 2GB RAM. Should I exchange the RAM I've purchased for 2GB sticks? That is often a route with some systems that refuse to find stability with all four DRAM banks populated. However, there are some who find stability and you may be one of those and doubly so if you find stability without having to drop DRAM bandwidth. If you are one of those, then I would not advise moving to 2 X 2048 unless you wish to move to 4 X 2048 in the future. Keep in mind, that if you are fully memtested stable with no issues, then it is very likely that you will be able to transition to 4 X 2048 in the future. Link to comment Share on other sites More sharing options...
ronin4740 Posted October 20, 2007 Author Share Posted October 20, 2007 Thanks for the reply. The system won't post if I set the timings manually so I guess I fall into the "normal" category. It's more or less stable with all four sticks although I am having some intermittent RAID5 array corruption... Any thoughts on whether this might be due to having all four DIMM banks populated? TIA Link to comment Share on other sites More sharing options...
DerekT Posted October 20, 2007 Share Posted October 20, 2007 Thanks for the reply. The system won't post if I set the timings manually so I guess I fall into the "normal" category. Do you pass memtest with the settings on Auto? It's more or less stable with all four sticks although I am having some intermittent RAID5 array corruption... Any thoughts on whether this might be due to having all four DIMM banks populated? Does the issue repeat with 2 X 1024? Link to comment Share on other sites More sharing options...
ronin4740 Posted October 20, 2007 Author Share Posted October 20, 2007 I'll try it and see! Link to comment Share on other sites More sharing options...
ronin4740 Posted October 20, 2007 Author Share Posted October 20, 2007 Memtest passes with the memory on auto timings. I'll pull two of the 1GB sticks and see if the RAID array still corrupts occasionally. If it does not is that an indication that I should think about swapping the 1GB DIMMS with 2GB DIMMS? Link to comment Share on other sites More sharing options...
DerekT Posted October 20, 2007 Share Posted October 20, 2007 If it does not is that an indication that I should think about swapping the 1GB DIMMS with 2GB DIMMS? Yes, this was my idea as well. But, first, you might wish to retest with your Southbridge voltage increased. uGuru EQ Voltages Control ICH Voltage = 1.10 ICH IO Voltage = 1.55 Link to comment Share on other sites More sharing options...
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