TickleOnTheTum Posted August 18, 2014 Share Posted August 18, 2014 I have just installed this 12GB 2000MHz triple channel kit in my system and am having some problems. My system includes i7-920, Asus P6T Deluxe V2, and this memory kit amongst other things. The system is overclocked to 4GHz with no problems and has run fine for 5 years now... XMP Profile: #1 (10-10-10-27-2N-1.50V-1.20V) CPU Ratio: 21 BCLK: 191 DRAM Freq: 1531MHz UCLK/QPI Drate = Auto/Auto CPU V: 1.35v PLL V: 1/82v SPI/QPI V: 1.35v RAM V: 1.5v CPU-Z reports DRAM freq as 763.6MHz, FSB:DRAM = 2:8 when BIOS set to 1521MHz The problem is I can't get the memory to work past 1531MHz, the next step the BIOS allows is 1914MHz which should be achievable with this memory kit should it not? I've cleared the CMOS (more than once) the BIOS is up to date, and I've tried a few tweaks to some of the memory timings to relax things, both XMP Profiles #1 and #2, also upping the RAM V to 1.52v. Every time I set the speed to 1914MHz the BIOS CMOS always corrupts and I have to start all over again... Any help appreciated! Not great with maths so please go easy on me! Link to comment Share on other sites More sharing options...
emissary42 Posted August 18, 2014 Share Posted August 18, 2014 Have you ever tried using the XMP? That is how you to get the rated settings out of your memory kit. You then might have to start all over with your CPU oc however. Link to comment Share on other sites More sharing options...
TickleOnTheTum Posted August 18, 2014 Author Share Posted August 18, 2014 Yep, tried both XMP Profiles 1 and 2, no go... Link to comment Share on other sites More sharing options...
Yellowbeard Posted August 18, 2014 Share Posted August 18, 2014 Yep, tried both XMP Profiles 1 and 2, no go... Did you try them with the CPU at stock settings or, were you still OCed? Link to comment Share on other sites More sharing options...
TickleOnTheTum Posted August 18, 2014 Author Share Posted August 18, 2014 They work fine at stock settings, it is only when overclocked that they cause a problem. Am I doing something wrong, I'm not an expert at overclocking, but I expected them to just work, pretty much, as I would be running them undeclocked so to speak (1914 instead of 2000)... Link to comment Share on other sites More sharing options...
Yellowbeard Posted August 18, 2014 Share Posted August 18, 2014 That's not what I'm asking. When you tried the XMP profiles, was the processor speed at stock? Or was your processor OCed? This makes a difference. Link to comment Share on other sites More sharing options...
TickleOnTheTum Posted August 20, 2014 Author Share Posted August 20, 2014 That's was what I answered. When the CPU was at stock speeds (not overclocked) the memory worked fine. It is only when the system is overclocked that there is a problem. I can run the memory at 1531MHz at 9-9-9-26-1N when overclocked with no problems, but it refuses to work at 1914MHz no matter what settings I try, I've tried loosening all the timings etc. to ease things up for the memory but as soon a the PC reboots the BIOS corrupts and I have to cleat the CMOS... Link to comment Share on other sites More sharing options...
emissary42 Posted August 20, 2014 Share Posted August 20, 2014 For X58 mainboards using DDR3-2000 memory needs an overclock of the system bus / reference clock (BCLK@143MHz) and with a Nehalem processor also at least a 4000MHz uncore clock. I personally never had an ASUS P6T variant myself, but i suppose enabling the XMP in the bios does not apply all the other adjustments needed. It wold probably be a good idea, to read one or two Nehalem OC tutorials first, to understand the dependencies in place and what voltages and dividers you may need to manually adjust. Link to comment Share on other sites More sharing options...
TickleOnTheTum Posted August 22, 2014 Author Share Posted August 22, 2014 As I said in my first post, I have had the system running overclocked for 5 years now... As far as I can tell all my settings are correct and the memory should run at 1914MHz but won't. I'm wondering if the motherboard just can't handle it even though rated for up 2000MHz? Link to comment Share on other sites More sharing options...
Corsair Employee Corsair Dustin Posted August 22, 2014 Corsair Employee Share Posted August 22, 2014 Yeah, sounds like a motherboard issue. Your platform's on the old side and wasn't designed around the time these monsters were available. I'd honestly go back to 1531MHz with those timings and keep the CPU overclock, or alternatively, try to bump CPU voltage and see if that gets 1914MHz stable. Link to comment Share on other sites More sharing options...
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