DRen72 Posted November 21, 2007 Share Posted November 21, 2007 This past week I put together a new rig with an Asus P5E3 Deluxe and Intel QX9650. I'm using the Corsair TWIN3X2048-1800C7DFIN G DDR3-1800MHz RAM. My problem is that I cannot get a stable 1800MHz overclock due to the RAM. Windows posts at 1800MHz FSB, but all memory testing fails in a matter of seconds. At 1600MHz it is 100% stable. I bought this RAM expecting it to perform as advertised but I'm thinking the Asus BIOS being new and all may need some tweaks. In the BIOS I tried manually setting it for 7-7-7-20 and 2T with 2.0 volts, 450x8, but no luck. I've also seen various online reviews of this RAM and it should work at 1800MHz with no problems. Can anyone assist with getting this setup running at 1800MHz as it should? Link to comment Share on other sites More sharing options...
DerekT Posted November 21, 2007 Share Posted November 21, 2007 Please enter your entire BIOS settings with regards to the CPU AND the DRAM. Link to comment Share on other sites More sharing options...
DRen72 Posted November 21, 2007 Author Share Posted November 21, 2007 Thanks, here goes… AI O/C Tuner = Manual CPU Ratio Control = Manual Ratio CMOS Setting = 8 FBS Strap to North Bridge = AUTO FBS Frequency = 450 PCIE Frequency = 100 DRAM Frequency = DDR3-1800MHz DRAM Command Rate = 2T DRAM Timing Control = Manual CAS# Latency = 7 RAS# to CAS# Relay = 7 RAS# Precharge = 7 RAS# Active Time = 20 RAS# to RAS# Delay = Auto Row Refresh Cycle Time = Auto Write Recovery Time = Auto Read to Precharge Time = Auto Write Recovery Time = Auto Read to Precharge Time = Auto Read to Write Delay (S/D) = Auto Write to Read Delay (S) = Auto Write to Read Delay (D) = Auto Read to Read Delay (S) = Auto Read to Read Delay (D) = Auto Write to Write Delay (S) = Auto Write to Write Delay (D) = Auto DRAM Static Read Control = Auto DRAM Synamic Write Control = Auto Ai Clock Twister = Auto Ai Clock Skew for Channel A = Auto Ai Clock Skew for Channel B = Auto Ai Transaction Booster = Auto CPU Voltage = 1.3 (Note: I also tried 1.4) CPU PLL Voltage = Auto FBS Termination Voltage = Auto DRAM Voltage = 2.00 North Bridge Voltage = Auto South Bridge Voltage = Auto Clock Over-Charging Voltage = Auto CPU Voltage Damper = Auto CPU Voltage Reference = Auto North Bridge Voltage Reference = Auto CPU Spread Spectrum = Disabled PCIE Spread Spectrum = Disabled Then under Advanced… CPU Ratio Control = Manual Ratio CMOS Setting = 8 C1E Support = Disabled CPU TM Function = Enabled Vanderpool Technology = Enabled Execute Disable Bit = Disabled Max CPUID Value Limit = Disabled Thanks again for any assistance you can offer. Btw…This is BIOS revision 0601 Link to comment Share on other sites More sharing options...
DerekT Posted November 21, 2007 Share Posted November 21, 2007 You are overclocking your system. For testing the stability of the DRAM and to isolate the DRAM from the system issue you must remove the overclock. Then set the DRAM to DDR3-1800MHz at 7-7-7-20. DO NOT set the Vdimm to 2.0V!! The default voltage is 1.5v. You are driving .5v higher through this DRAM. So, set to default CPU, set to 1800 7-7-7-20 @ 1.5v and run Memtest. If any errors occur, remove one stick and test the sticks singly. You have to isolate the issue of the instability and then work on installing a stable overclock. Results? Link to comment Share on other sites More sharing options...
DRen72 Posted November 21, 2007 Author Share Posted November 21, 2007 Thanks, but I'm confused now. First, I can't not overclock and use the 1800MHz bus. The board just doesn't work that way. If I set the FSB back to 1333, the BIOS removes the option to run the RAM at 1800MHz, so thats not possible. Also, the Corsair RAM is designed to run at 2.0volts at 1800MHz per the Corsair web site and all the review sites. I appreciate the response, but are you from Corsair? Link to comment Share on other sites More sharing options...
DerekT Posted November 21, 2007 Share Posted November 21, 2007 Thanks, but I'm confused now. First, I can't not overclock and use the 1800MHz bus. The board just doesn't work that way. If I set the FSB back to 1333, the BIOS removes the option to run the RAM at 1800MHz, so thats not possible. Also, the Corsair RAM is designed to run at 2.0volts at 1800MHz per the Corsair web site and all the review sites. That is a new BOARD/DRAM and I have yet to work with them. It would seem that they are not yet optimized to natively support the DRAM speed at 1800Mhz. I missed the Vdimm settings as well. Please chalk that up to new hardware as yet untested by me. Thanks for the heads up on this information. Sometimes the informations comes the other way. Hopefully you are not too frustrated with helping another with new hardware. :D: You may wish to read this thread. http://www.houseofhelp.com/v3/showthread.php?t=62626 I appreciate the response, but are you from Corsair? No, I am not from Corsair. They seldom frequent this forum. You would be better off posting Here for their help. Link to comment Share on other sites More sharing options...
DRen72 Posted November 22, 2007 Author Share Posted November 22, 2007 No problem. I don't mind helping. I just thought at first you where with Corsair. Well, if you find anything, would you let me know here? Thanks. Link to comment Share on other sites More sharing options...
Wired Posted November 22, 2007 Share Posted November 22, 2007 Thread moved. Corsair employees that post on the forum can be found within this page: http://www.asktheramguy.com/forums/showgroups.php 99% of the time though, Ram Guy will be the one replying to you. I doubt they're back until next week due to Thanksgiving. Link to comment Share on other sites More sharing options...
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