cabal666 Posted November 24, 2007 Share Posted November 24, 2007 hi guys, i´m from germany so please excuse my bad english. my question: i bought two pairs of corsair cm2x1024-8500c5d , but different versions. 2.1 and 2.2 pair 1 runs on 2.1 volt and the other with 2.2 when i try to run them vista doesn´t start. memtest shows me errors. when i run them seperately vista starts and they run perfectly. should i try different settings in bios. mobo is gigabyte p35-ds3r cpu q6600 thanks for helping me. Link to comment Share on other sites More sharing options...
DerekT Posted November 24, 2007 Share Posted November 24, 2007 It is far harder on the motherboard Memory Controller Hub (Northbridge) since it now has to deal with 4 slots being populated vs 2 slots being populated. The Northbridge can not easily keep up with that DRAM speed and the speed of the DRAM throughput must be lowered to keep it stable. You can overclock the CPU <--> MCH <--> DRAM throughput and in doing so reclaim most (if not all) of the Bandwidth but in doing so you do create higher temperatures from higher voltages. The P35 has no problems with this raise though. So, drop your bandwidth to 800Mhz for four sticks as set below. Download memtest from http://www.memtest.org and extract the ISO image. Burn the ISO image to an CD-ROM disk. Insert the first set of 8500's. Enter your BIOS. On the main BIOS screen press Ctrl + F1. You will see the screen flicker. Next select the MB Intelligent Tweaker option. On that screen you will see many additional settings that were not there before. Set to the below values. MIB Intelligent Tweaker (M.I.T.) CPU Clock Ratio = 9 CPU Host Clock Control = Enabled CPU Host Frequency (Mhz) = 266Mhz PCI Express Frequency = 100Mhz C.I.A.2 = Disabled System Memory Multiplier = 3 DRAM Timing Selectable = Manual CAS Latency Time = 4 DRAM RAS# to CAS# Delay = 4 RAS# Precharge = 4 Precharge Delay (tRAS) = 12 ACT to ACT delay = Auto Bank Write To READ Delay = Auto Refresh to ACT Delay = Auto Read to Precharge Delay = Auto Memory Performance Enhance = Normal Dimm OverVoltage Control = +.3V PCI-e OverVoltage Control = Normal (G)MCH OverVoltage Control = +.03 CPU Voltage Control = Auto Robust Graphics Booster = Auto Shut the system down and insert the second set of 8500's and boot to the optical drive with the memtest disk and allow for two full passes. If the system does not boot or Memtest fails, then remove the second set, enter the BIOS and set the Dimm Overvoltage Control to +.4V, shut down, insert the second set and boot to the optical drive with the memtest disk and allow for two full passes. Results? Link to comment Share on other sites More sharing options...
cabal666 Posted November 25, 2007 Author Share Posted November 25, 2007 it works. i run both pairs at 800 mhz and system runs stable. thx for your support. Link to comment Share on other sites More sharing options...
DerekT Posted November 25, 2007 Share Posted November 25, 2007 You're very welcome :) If you decide you want to regain some of that bandwidth back you can post in the "Enthusiast" section and I can help you recoup some of it via an overclock. Link to comment Share on other sites More sharing options...
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