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CMZ4GX3M1A1600C9 on Asus P8P67


SK10H

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Hi, I am using CMZ4GX3M1A1600C9 x 2 on the blue slots A2 and B2 on Asus P8P67 using beta BIOS 1053 build on Jan04,2011. I am having trouble running the memory at DDR3-1600, not the memory fault.

 

http://img228.imageshack.us/img228/4981/memspeed.jpg

 

As the screenshot shows, memory speed is at 667. I tried to adjust the AI Overclock Tuner to Auto/Manual/XMP, tried them all while setting the Memory Frequency to DDR3-1600, but cpu-z report 667 only. I confirm it using AIDA64 benchmark comparing other 1600 results.

 

I am able to adjust the command rate to 1T within the Dram timing section, but apparently not the speed. I am stuck at DDR3-1333 while processor is flying at 4.8GHz. :p: I am stuck... :sigh!:

 

When I choose DDR3-1866 with VDimm at 1.65v and loosen the timings, it won't post at all. I think there might be some incompatibility here that need to be resolved with newer motherboard BIOS.

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Tried the stock BIOS built in Oct, 1003 and the beta BIOS 1053. Same result, never run at 1600. Got a response from Asus tech support saying since it's not on the Memory QVL, result aren't guarantee and tell me to check with memory manufacturer. But at least now Asus is aware of the problem so let's hope newer BIOS fix it. ;):
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Tried the stock BIOS built in Oct, 1003 and the beta BIOS 1053. Same result, never run at 1600. Got a response from Asus tech support saying since it's not on the Memory QVL, result aren't guarantee and tell me to check with memory manufacturer. But at least now Asus is aware of the problem so let's hope newer BIOS fix it. ;):

 

Uhm, I'm curious to hear what the memory manufacturer have to say about this thing. :D

 

By the way, I've heard someone has solved this problem pushing the "Clear CMOS" button.

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I could be wrong but I think you are running at 1300. Since you are running two sticks of ram, you take the number that you see and multiply it by two.

 

Don't take my word for it. Wait for someone more experienced to reply.

You don't multiply the speed by the number of sticks.

 

DDR = Dual Data Rate.

 

Regardless the number of sticks, whether it be one or six, it's the ACTUAL speed (666.7 MHz) doubled, so 666.7 MHz * 2 = 1333.4 MHz, which is the EFFECTIVE speed.

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  • Corsair Employee

Wired; while he does not work directly for corsair has been an Administrator on this forum for at least 9-10 years and has a vast knowledge of our products.

If you do not believe what he or I have stated a quick search at http://www.google.com can confirm what he has told you.

DDR + Double Data Rate IE 667 MHz X 2 = DDR 1333

Some programs show the actual clock frequency not the DDR frequency. So that is normal.

 

And have you tried to set the memory to XMP in the BIOS setup and the modules should be installed in Slots A1 and B1 in most Asus MB's. If you are mixing two sets you will most likely need to run them at DDR1333 to keep the system stable, as Mixing memory is not officially supported.

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I tried the clear CMOS and it does not work. I have only tried A2 & B2 as the manual stated for optimal compatibility, put them in those slots. I will see if A1 & B1 make a difference.

 

Currently, speedstep is enabled, I think I disable in the past. BIOS indicates target memory speed is 1600Mhz, save and exit, go to cpuz, load up prime95, cpu turbo kick in to 48 multi, ram stay at 667.

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ok, got it working at 1600 by putting them into A1 & B1 slots. Never trust the manual for stating to put them in A2 & B2 for better compatibility for 2 slots memory installation ever, when the BIOS lie at the same time. :p:

 

I did not try them in A1 & B1 slots initially since I am using the Corsair A70 fan where the fan near the memory slot interfere with the Vengeance since its heatspreader is so tall. :eek:

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ok, got it working at 1600 by putting them into A1 & B1 slots. Never trust the manual for stating to put them in A2 & B2 for better compatibility for 2 slots memory installation ever, when the BIOS lie at the same time. :p:

 

I did not try them in A1 & B1 slots initially since I am using the Corsair A70 fan where the fan near the memory slot interfere with the Vengeance since its heatspreader is so tall. :eek:

 

not good to hear that.

I have a P8P67 Deluxe mobo with vengeance cas8 2x4gb and I'm waiting the cpu to fireup my system, but no good news...

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