ASUS Sabertooth Z77 XMP & G.SKILL Trident X Series 16GB

[SaphireX]

On a friend's rig ASUS Z77 Sabertooth with latest UEFI/BIOS using G.SKILL Trident X Series 16GB (4 x 4GB) Model F3-2400C10Q-16GTX there are 2 XMP profiles.
Profile #1 at 2401mhz 10-12-12-31 Voltage1.65V and
Profile # 2 at 2399mhz same timings.
Using XMP profile #1 the system under Win7 X64 has frozen a couple of times, forcing a reset. Otherwise it boots just fine. Ran the memory tester native to Win7 and it pased passe one but failed almost at the end of pass 2. Is there is some other setting in the UEFI that might need to be tweaked to avoid the infrequent freezes? Since it would appear that the freezes might be due to the memory and not the OS driive which is a single SSD SATA-3 firmware up to date...

Any ideas?

Thanks
SaphireX

[Tradesman]

What CPU are you running? a 3570K or 3770 K should be able to carry the sticks, though you may have a problem if it's a 25/26/2700K as their MC (memory controller is generally fine through 2133/2200 but can have problems above that that would need extra voltage to the VCCSA and possibly the MC voltage (which the 3570/3770Ks might encounter the need for also

[SaphireX]

He is running the i7 3770K and the UEFI "optimized defaults" with the exception of the XMP profile #1
Not sure (since I am not at his machine) what the "optimized/auto" VCCSA voltage is as well as what the MC voltage is.

What do you recommend to set the VCCSA voltage to for starters since it ranges from .90V to 1.70V in .00625V increments?

What do you mean by MC voltage? Is that called DRAM voltage in the UEFI or is that CPU voltage or CPU PLL voltage? Whichever one that it is (unless there is another name) What baseline setting do you recommend?

Sounds like for starters to gradually increase the VCCSA voltage and memtest86 to find what lowest setting creates a stable system...Is that correct

Thanks
SaphireX

[Tradesman]

If VCCSA needs to be raised start at about 1.1, would guess 1.25 would be max needed....MC voltage, I believe is shown as VTTCPU or CPUVTT, will try and check

[SaphireX]

Hi Tman

Just discovered that ASUS just released, a couple of days ago, a new UEFI version 1206 for the board that fixes 1. System stability 2. "MEMORY COMPATIBILITY" and 3. USB compatibility. As soon as I get a chance to assist my Friend with flashing to this new UEFI will SEE if this solves the freezing...

In the mean time can you please find out what the MC voltage is in the UEFI be it VTTCPU or CPUVTT?

It would be greatly appreciated as that way if after flashing to the new UEFI there is still issues we can start raising the VCCSA at 1.1V to get stability and if need be tackle raising this MC voltage...

Many Thanks

SaphireX

[Tradesman]

If VCCSA is at 1.25 then try raising PCH a notch or so

[SaphireX]

Hi Tman
Sorry for the delay in replying...With the new UEFI flashed using XMP profile #1 so far he has had no freeze-ups and his rig has passed the native memory tester in Win7. So it would appear that maybe the newer UEFI fixed things and thereby increased his stability...Many Thanks again for your advice and if down the road something crops up will check the VCCSA voltage and raise the PCH if needed.
I will of course provide positive feedback!
SaphireX

[Tradesman]

Glad to hear they got the BIOS updated, BIOS is an on-going project w/ all the mobo makers as newer sticks, both higher freq and density comes out, sorry it took so long