Issues setting up Dual Channel HELP!!

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john1587

john1587

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Jan 23, 2013
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Today i finally get 2 x 4 gb corsair vengance 2133 mhz, I am trying to set up dual channel in my asrock extreme6 but when I install a memory stick either in stick 3 or 4 the computer even doesnt boots to Bios. but if i install on sticks 1 or 2 it boots up but in single channel mode :/, I know that for dual you need to put them in stick 1 and 3 or 2 and 4 but I am not sure if sticks 3 and 4 are not working or i have to do something special to make them work. HEELPPP!!! this motherboard is practically brand new and the memory also
 
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Feldmarschall

Feldmarschall

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Mar 9, 2013
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Hi,

Your memory support list says that only CMT4GX3M2A2133C9 "Dominator" Corsair memory was tested at that speed.
Vengance at 1866 succesufully.

If you google 2133 z77 extreme6 memory problem you will find that lot of people had same problem.

You may wan't to downcloack your memory a bit. Perhaps to 2000Mhz or 2100Mhz and try again. If not succesufull then you should try with 1866Mhz.
 
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utroz

utroz

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First off asrock makes several different "extreme 6" motherboards one is a Z77 (Intel 1155), another is X79(Intel 2011) and another is a FM2-A85X (AMD FM2), and finally a FM1-A75X (AMD FM1) which one of these do you happen to have because it really helps to know exactly which one you have.. Till then we are making blind guesses. In some of them you may need to put them in slots 1+3 or 2+4 to get dual channel and in others you may have to use slots 1+2 or 3+4. If you think a ram stick might be bad try each sick separately and then run a memory test such as memtest+...
 
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john1587

john1587

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Its a Z77 and according to the manual it should be slots 1 + 3, I tested with just one stick in slot 1 OK, slot 2 OK, slot 3 do not boot then slot 4 do not boot, I did the same with the other stick and same results... is this my motherboard? i just find very "casuality" that exactly slots 3 and 4 seems to not work and this is a brand new MB :(
 
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Feldmarschall

Feldmarschall

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As I said. Corsair Vengance is not tested at that speed on your motherboard. You're lucky that even first two slots work.
It is possible that only single channel mode will work with this memory.
Lot of manufacturers refer to use first slot of each channel when using unsupported memory, or memory above certain clock.

In theory...
Boot with your PC with single channel mode. Enter BIOS and downclock your memory to 1600Mhz. Save and shut down your PC and then try to go for dual channel. After succes try to up clock to 1866.
 
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utroz

utroz

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Yes put your ram speeds down to 1600 or even 1333 with one stick in slot 1 then shut down and add the second stick to slot 3 and see if dual channel works. You might have to manual set the ram settings to be able to get them sticks to run at faster speeds, your motherboard may be setting the timings too tight in auto mode which would cause it not to work right or at all.. Generally try loose ram settings at first an then work on tightening them.. You are only trying to use the 2x4GB Ram kit right, and not adding them to another set that you already have because that could cause issues as well..
 
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john1587

john1587

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I tried that with no luck :/ also tried to put my old ram stick which was a kingston hyper x 1600 mhz into ram slot 3 and 4 and the results are the same, the PC wont boot even to bios and just resets.
I am not sure if this is ram slot issue but i tried to turn on the pc without ram and it at least keeps turned on. what you think?
 
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Feldmarschall

Feldmarschall

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Did your old Kingston hyper x worked before in dual channel mode? Or if it is single stick, did you tried it in slots 3 and 4 before?

It could be that your mobo is damaged. Continous restart will point to short circuit protection. Maybe RAM sticks in slot's 3 and 4 do not sit properly and that's why you have.
 
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john1587

john1587

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Its a single stick and I have always used the slot 1, but when i tried slots 3 and 4 start with the on - off proccess.
 
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john1587

john1587

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In case that is the MOBO is there any fix for this?, the MB is practically brand new but I dont have warranty as i am out of US, I dont want to damage the MB also so what do you recommend?, can I stay with single channel? I have the two sticks working together in single channel at 1100 Mhz so dual is supposed to be 2200 Mhz, my 3DMark11 physics score has increased from 7300 using the kingston memory to 8060 using the corsair ram. By the way I am using a 3570K OC to 4.4 GHz.. will dual channel increase significantly my physics score?

Thanks
 
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