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Memory Instability with my 980x OC at 4.6?

post #1 of 5
Thread Starter 
Earlier this week I was able to stabilize (or so I thought) my overclock at 4.6Ghz. Prime95 (Blend) ran for 24 hours. 20 Runs of IBT on Max and another 20 hours of FAH all worked without any problems.

Last night I decided I'd let FAH run overnight. Woke up this morning to my computer sitting at the login screen and when I logged in a message saying that my computer encountered a severe error.

Started up another session of Prime95 (blend) then headed into work. An hour later Prime95 workers are failing with rounding errors. Rebooted started Prime85 (blend) again, an hour later works start getting rounding errors again.

Ran another Prime95 (Custom using 6400mb) of memory and rounding errors in 5 minutes. Then I started another Prime95 run with Small FFT and its been running for almost 2 hours now without any problems.

I'm using 33 Multiplier x 139 BCLK giving me 4.6Ghz
DRAM Frequency is 1950Mhz
PCIE Frequency is 105
UCLK Frequency is Auto
QPI Link Data Rate is Auto

LLC is disabled

vCore is 1.45
PLL is 1.88
QPI is 1.4
Memory is at 1.65

IOH is 1.2
ICH is Auto

Here a link to the memory that I am using.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820145318

Here is my CPU-Z link as well, (not sure if this helps at all)
http://valid.canardpc.com/show_oc.php?id=2226921

LL

Any suggestions for me to get this thing stabilized again?
Edited by vulpecula - 2/3/12 at 12:46pm
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Hercules
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post #2 of 5
Try bumping the IMC voltage up a little.
with 6 Sticks, there's supposedly a little stress on the IMC, and it requires a small nudge.

Report back after trying smile.gif
post #3 of 5
Increase tRFC by about 30-40.

QPI/VTT is already pretty damn high for a 3GHz uncore.
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post #4 of 5
Thread Starter 
Quote:
Originally Posted by McMogg View Post

Try bumping the IMC voltage up a little.
with 6 Sticks, there's supposedly a little stress on the IMC, and it requires a small nudge.
Report back after trying smile.gif

Will do. Should be easy to figure out if it works or not since Prime95 fails within a few minutes when doing a blend test.
Quote:
Originally Posted by Blameless View Post

Increase tRFC by about 30-40.
QPI/VTT is already pretty damn high for a 3GHz uncore.

I set it to 1.4 based on some suggested settings for other 980x owners. I will try this as well.
Edited by vulpecula - 2/3/12 at 1:22pm
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Hard DriveOptical DriveCoolingOS
120GB OCZ Vertex 3, 2x600GB WD Raptor, 1.5TB WD... Sony Optiarc CD/DVD Burner Custom Loop w/ EK CPU and Mobo Blocks Windows 7 Ultimate 64-Bit 
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Hercules
(14 items)
 
Orion
(9 items)
 
 
CPUMotherboardGraphicsRAM
Intel 980x @ 4.6Ghz ASUS Rampage III Extreme 3-Way SLI EVGA Geforce GTX 780 Ti Superclocked ... 12 GB PC16000 Corsair Dominator GT 
Hard DriveOptical DriveCoolingOS
120GB OCZ Vertex 3, 2x600GB WD Raptor, 1.5TB WD... Sony Optiarc CD/DVD Burner Custom Loop w/ EK CPU and Mobo Blocks Windows 7 Ultimate 64-Bit 
MonitorPowerCaseMouse
2x Dell U2711 SilverStone ST1500 Corsair 800D Logitech G9x 
CPUMotherboardGraphicsRAM
Intel 2700k @ 4.8Ghz ASUS Maximus IV Extreme-Z 2-Way SLI EVGA GTX 580 SC 1.5GB 8GB Dominator GT Series DDR3-2000 
Hard DriveCoolingOSPower
120GB OCZ Vertex 3, 2x600GB WD Raptor Corsair H100 Windows 7 Professional Corsair AX1200 
Case
NZXT Switch 810 
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post #5 of 5
Thread Starter 
I am an idiot...mad.gif

Got home, went into my OC profiles...loaded my 4.6Ghz profile and the QPI went from 1.4 to 1.375. 30 minutes into Prime 95 on Custom using 6400mb of memory and its still plugging away.

I forgot that I was messing around with getting to 4.7, and for whatever reason I set everything back manually instead of loading my OC profile.

So it seems like it's stable with a 1.375 QPI versus 1.4. Going to let this run for a couple more hours just to be sure, but I'm pretty sure that's why it suddenly became unstable.
Hercules
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Orion
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CPUMotherboardGraphicsRAM
Intel 980x @ 4.6Ghz ASUS Rampage III Extreme 3-Way SLI EVGA Geforce GTX 780 Ti Superclocked ... 12 GB PC16000 Corsair Dominator GT 
Hard DriveOptical DriveCoolingOS
120GB OCZ Vertex 3, 2x600GB WD Raptor, 1.5TB WD... Sony Optiarc CD/DVD Burner Custom Loop w/ EK CPU and Mobo Blocks Windows 7 Ultimate 64-Bit 
MonitorPowerCaseMouse
2x Dell U2711 SilverStone ST1500 Corsair 800D Logitech G9x 
CPUMotherboardGraphicsRAM
Intel 2700k @ 4.8Ghz ASUS Maximus IV Extreme-Z 2-Way SLI EVGA GTX 580 SC 1.5GB 8GB Dominator GT Series DDR3-2000 
Hard DriveCoolingOSPower
120GB OCZ Vertex 3, 2x600GB WD Raptor Corsair H100 Windows 7 Professional Corsair AX1200 
Case
NZXT Switch 810 
  hide details  
Reply
Hercules
(14 items)
 
Orion
(9 items)
 
 
CPUMotherboardGraphicsRAM
Intel 980x @ 4.6Ghz ASUS Rampage III Extreme 3-Way SLI EVGA Geforce GTX 780 Ti Superclocked ... 12 GB PC16000 Corsair Dominator GT 
Hard DriveOptical DriveCoolingOS
120GB OCZ Vertex 3, 2x600GB WD Raptor, 1.5TB WD... Sony Optiarc CD/DVD Burner Custom Loop w/ EK CPU and Mobo Blocks Windows 7 Ultimate 64-Bit 
MonitorPowerCaseMouse
2x Dell U2711 SilverStone ST1500 Corsair 800D Logitech G9x 
CPUMotherboardGraphicsRAM
Intel 2700k @ 4.8Ghz ASUS Maximus IV Extreme-Z 2-Way SLI EVGA GTX 580 SC 1.5GB 8GB Dominator GT Series DDR3-2000 
Hard DriveCoolingOSPower
120GB OCZ Vertex 3, 2x600GB WD Raptor Corsair H100 Windows 7 Professional Corsair AX1200 
Case
NZXT Switch 810 
  hide details  
Reply
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