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post #11 of 14
yea just make sure qpi/vtt is within .5v of your vdram voltage.

i honestly think maybe you need a new BIOS or new OS install.
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post #12 of 14
I had this issue, if I recall, once the issue occurs (EVGA boards) it seems to be stuck no matter what VTT changes you make, but it is effective after clearing CMOS.

Its good to know what VTT voltages you have at stock, mine is 1.200v set in bios, with a +30mV overvoltage. So at stock its 1.230v

It requires +75mV to be stable with 24.0 GB Ram, but my Ram is also rated 1.65v, and it required 1.66v. This was a load VTT of 1.31v, and required a CPU core of no less than 1.28v (full load @ 4.1001 GHz) for stability to be there. Now disappearing RAM is pain in the butt, but a very common issue, especially users of all six slots.

Clearing CMOS had the effect of fixing many issues with the EVGA bios that seemed to appear after making changes. The 37 second cold boot for starters with VTT enabled/disabled that they only just fixed/broke/fixed a week ago.

Steps To Take:
Clear CMOS and try again.

If the clearing CMOS does not work, after you have made all correct changes. Then possibly a broken XMP profile, so memory speeds/timings/voltages need to be manually, after another clear CMOS.

SORRY Osama Bin Laden has been announced dead. Distracted

Adjusting VTT in increments of 25mV.
If that fails, set speeds / voltages to stock, while attempting again with VTT.
Adjust QPI as a last resort, but only one increment and test the VTT increments all over for every level of QPI.

Then try again with +10mV to the Dram Voltage and try again.

If stock doesn't work, try and adjusting memory timing +tRL to +1, then +2.
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Snowdevil
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post #13 of 14
Thread Starter 
Quote:
Originally Posted by RagingCain View Post
I had this issue, if I recall, once the issue occurs (EVGA boards) it seems to be stuck no matter what VTT changes you make, but it is effective after clearing CMOS.

Its good to know what VTT voltages you have at stock, mine is 1.200v set in bios, with a +30mV overvoltage. So at stock its 1.230v

It requires +75mV to be stable with 24.0 GB Ram, but my Ram is also rated 1.65v, and it required 1.66v. This was a load VTT of 1.31v, and required a CPU core of no less than 1.28v (full load @ 4.1001 GHz) for stability to be there. Now disappearing RAM is pain in the butt, but a very common issue, especially users of all six slots.

Clearing CMOS had the effect of fixing many issues with the EVGA bios that seemed to appear after making changes. The 37 second cold boot for starters with VTT enabled/disabled that they only just fixed/broke/fixed a week ago.

Steps To Take:
Clear CMOS and try again.

If the clearing CMOS does not work, after you have made all correct changes. Then possibly a broken XMP profile, so memory speeds/timings/voltages need to be manually, after another clear CMOS.

SORRY Osama Bin Laden has been announced dead. Distracted

Adjusting VTT in increments of 25mV.
If that fails, set speeds / voltages to stock, while attempting again with VTT.
Adjust QPI as a last resort, but only one increment and test the VTT increments all over for every level of QPI.

Then try again with +10mV to the Dram Voltage and try again.

If stock doesn't work, try and adjusting memory timing +tRL to +1, then +2.
Some good advice sir, I shall try this.
post #14 of 14
Quote:
Originally Posted by Masked View Post
Some good advice sir, I shall try this.
Its a very very very slow process my way, but it reduces your voltage foot print to the minimum levels necessary for stability as opposed to the brute force method some people apply with voltage (the more the better.) Thats the only way I roll.

There is one more thing to add, I don't know if you have MCH strap (not all x58 boards do have this), but until you are stable, don't set it to auto. This sets all your secondary memory timings to either tighter/looser. If I am aiming for 2000 MHz, I set my MCH Strap to 2133 while getting everything to work. If its good, then I lower it to 1867. All it does is tries to give it the timings of 1867 MHz memory (so run tighter) while using 2000 MHz speed effective on the RAM. Not a big deal, but a lot of users set it to AUTO or DRAM Ratio. AUTO seems to be almost random at times while DRAM Ratio, is usually 1:8/1:10/1:12 (equivalent to MCH Strap) except that most people adjust the Bclck thus giving them memory more speed, but keeping the numbers on par with lower speeds timing. Since a lot of this goes on behind the scenes, it adds tons of variables. Just while you are ocing / setting it up, set the MCH strap / timings, to one level above where you are aiming at to aid in stability.
Edited by RagingCain - 5/2/11 at 8:54am
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Snowdevil
(16 items)
 
ASUS G750JM
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CPUMotherboardGraphicsGraphics
[i7 4790K @ 4.4 GHz (1.186v)] [Asus Sabertooth Z97 Mark S] [nVidia Geforce GTX 1080] [nVidia Geforce GTX 1080] 
RAMHard DriveCoolingOS
[G.Skill 32GB DDR3 2133 MHz] [Crucial MX100 256GB] [Phanteks PH-TC12DX] [Win 10.1 Pro] 
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[LG 29UM65 (2560x1080)] [QNIX Evo II LED (2560x1440)] [WASD v2 Tenkeyless] [NZXT Hale90 v2 ] 
CaseMouseMouse PadAudio
[ThermalTake GT10 Snow Edition] [Razer Mamba - Chroma] [Razer Kabuto] [Razer Man O' War] 
CPUMotherboardGraphicsRAM
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