Sabertooth Z87 And Corsair Vengeance 1866mhz Is Only Stable At 1333mhz

thekingsown · Jul 3, 2013

I'm having this problem that when i try to set the ram to stock speeds (1866) the computer fails to boot and has to be reset to load with the default auto 1333. I have also tried setting the AI overclock tuner to XMP at 1866 but this also fails to boot.

I have also tried lowering it to 1600 and it does boot but is very unstable I bought 1866 ram and want to run it at 1866 :/

does anyone have any ideas ?

Tradesman1 · Jul 3, 2013

What set of sticks do you have - is it a single set or two packages together - and what CPU? If it's a locked CPU, might not be able to handle 1866 (or even 1600). Anyway, make sure you have the latest BIOS then try enabling XMP and select profile 1

thekingsown · Jul 3, 2013

hi trade,

I'm using qualified venders ram for the board that came in 1 set of 2 modules 4gb each totalling 8gb (corsair vengeance) and an i7 4770K

I have updated my bios to the latest version stlil no luck

Tradesman1 · Jul 3, 2013

May be a bad stick, have you tried 4-5 passes of Memtest on each stick individually?

thekingsown · Jul 3, 2013

yep it checks out ok everytime, I cant put my finger on this

Tradesman1 · Jul 3, 2013

BIOS may be off, can your give the model of the vengeance and we'll try manual set up

thekingsown · Jul 3, 2013

sure its , CMZ8GX3M2A1866C9

thekingsown · Jul 3, 2013

I can see timings for the ram from the manual they are , 9-10-9-27 my timings are different in my bios but i'm not sure on how to change them. Could you explain what I should change and how?

thanks very much

Tradesman1 · Jul 3, 2013

OK, set freq to 1866, base timings to 9-10-9-27, CR to 2T, DRAM voltage to 1.55 and try that, if no joy raise VCCSA voltage to 1.13

thekingsown · Jul 3, 2013

In the sabertooth bios i see primary and secondary timings ,

under each one is :

Dram CAS
DRAM RAS TO CAS DELAY
DRAM RAS PRE TIME
DRAM RAS ACT TIME
DRAM COMMAND RATE

which numbers do i change?

where can i find the voltages in the bios?

Tradesman1 · Jul 3, 2013

Dram CAS 9
DRAM RAS TO CAS DELAY 10
DRAM RAS PRE TIME 9
DRAM RAS ACT TIME 27
DRAM COMMAND RATE 2 and either N or T whichever the mobo uses

thekingsown · Jul 3, 2013

no luck

, comp just shuts off an keeps trying to reboot over and over

Tradesman1 · Jul 3, 2013

Might try with a single stick or try resetting the CMOS

Pierre_Dolphin · Jul 24, 2014

If this isn't too late, i just found the solution. I use a sabertooth z97 mark 2 with 2x8 gb of corsair ram at 1866 mhz. At first the bios showed that the ram was 1300 mhz, but all i did is i went into EZ mode and change the performance mode on the top right corner from normal to ASUS whatever... the highest performance one. Then i rebooted and my ram was set to 1866 mhz automatically. I don't know why the bios was designed in this nonsense way but at least there is an easy way around it. Hope this helps anyone that is getting the same issue.

On a side note, the ASUS bios also has a setting that adds a 3 second waiting time by default. It is not disabled even if you enabled fast boot. The only way to get rid of it is to go into advanced mode, then booting, then scrol down until you find the setting showing 3 seconds. Change that into 0 and your boot time is now magically 3 seconds faster.

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Sabertooth Z87 And Corsair Vengeance 1866mhz Is Only Stable At 1333mhz

thekingsown

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Tradesman1

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thekingsown

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thekingsown

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thekingsown

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thekingsown

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thekingsown

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