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[Build Log 11/26/11] First Log for Sandy Bridge-E 3930K Build - Page 4

post #31 of 34

Yeah, mostly new stuff. Also XMP is ok when you run stock, but it goes beserk when you start overclocking.

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post #32 of 34
Thread Starter 
I had manually set the voltage, timing and command rate. I decided to try XMP but still had an "Overclocking failed" error appear. I kept the manual settings and just enabled XMP. Just a minor inconvenience that happened a few times so far.

Will attempt overclocking this weekend or next week at the latest. Going to try for 4.8 GHz and 1,000 MHz / 1,500 MHz for my HD6970s. Will go with 4.5 GHz and 950-980 MHz / 1,450-1,480 MHz if that takes more voltage than I am comfortable with running 24/7 or gets too hot. I'd like for my CPU to last until IB-E is released then a few years after that in a secondary desktop system.
Edited by Improvidus - 12/8/11 at 6:57pm
     
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post #33 of 34
Thread Starter 
I now have my system up and running at 4.5 GHz 4.8 GHz on my 3930K with 950 MHz / 1,450 MHz on my HD6970s. This is a moderate overclock that was very simple and took all of 5 minutes minus stress testing to check reliability. This overclock was so easy that I may be going for 4.8 GHz to 5.0 GHz very soon. I may try the Extreme OC profile found in my Rampage X79's setup. Supposedly this sets the CPU overclock to around 4.9 GHz. I'm not sure if these profiles are any better or any worse than manual settings. I will stress test my system a bit overnight and if all goes well I'll keep pushing higher until I get uncomfortable with my temperatures and/or voltages.

I will use some combination of LinX w/ updated Linpack, IntelBurnTest, OCCT, and Prime95 for stress testing. At first I plan to run some combination of the tests probably overnight for about 12 hours. If that is stable I'll bump the overclock up a bit higher and repeat the stress testing overnight for about 12 hours again. So far everything is looking great. Can't wait to see how far I can push this overclock without pushing too much voltage and without too much heat. Overclocking Sandy Bridge is so easy! thumb.gif

I didn't change the voltage settings in the UEFI setup for my 4.5 GHz overclock, but I did slightly for 4.8 GHz. I may be able to get my voltages a little bit lower because of this for a overclock of 4.5 GHz.

4.5 GHz - Stable:
i5Wo5.png

4.8 GHz - Stable:
FLlEb.png

Settings are as follows:
  • CPU VCORE Offset Voltage: +0.010
  • CPU VCCSA Offset Voltage: +0.010
  • BCLK Skew: -2
  • PCIE CLK Skew: -20
  • CPU Load-line Calibration: Ultra High
  • CPU Current Capability: 180%
  • VCCSA Load-line Calibration: Extreme
  • VCCSA Current Capability: 140%
  • CPU and PCIE Spread Spectrum: Both Disabled
  • C3, C6 and C7 States: All Disabled

DDR speed, timings and voltages are manually set. Most everything else is set to Auto or the default setting. Pretty happy with the low to mid 30s for idle temperatures. Ambient is a bit cooler than it was the other day when I had mid 30s idle temperatures.

http://valid.canardpc.com/show_oc.php?id=2146505
http://www.ozone3d.net/msi_kombustor/score_200.php?id=27612
http://www.ozone3d.net/msi_kombustor/score_200.php?id=27613
Edited by Improvidus - 12/14/11 at 1:02pm
     
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post #34 of 34
Thread Starter 
Not sure what's going on exactly. My LinX is running slower now. The GFlops reading has decreased and instead of 136 GFlops I now get 128 GFlops and the time to complete has gone up from 404 seconds to 428 seconds. The core voltage will occasionally drop to 1.224 while LinX is running and it isn't happening in between runs but instead during the runs. I have the same exact settings except for on VCCSA Load-line Calibration and VCCSA Current Capability. The only other thing I've changed since then has been disabling C3, C6, and C7 states as I got a blue screen with error code 124 at idle while browsing the web last night.

Could disabling the C-states lower my benchmark scores by nearly 8 GFlops? That seems like an awful big loss and I don't know why. Ambient temperatures are the same as they were when I was seeing 136 GFlops. Anyone know what could be going on here?

According to this thread changing the C-state settings from the default could have an adverse effect on performance: http://www.evga.com/forums/tm.aspx?m=928984. 8 GFlops difference seems like too much, but is there any way around this? Is it possible to fix the 0x0124 blue screen error code when overclocking without sacrificing a whole 8 GFlops of performance or without disabling C-states? I could try raising the VCore or changing the LLC setting but I don't want to keep pushing more and more VCore. My temperatures reach the mid 80s under full load and I would like to keep them below 90 °C at full load. I'd also like to keep VCore under 1.45 for 24/7 usage and I've seen it go up to 1.448 at my current settings already.

I raised my CPU VCore Offset Voltage to +0.020 and I'm just about back to where I was at before. +0.010 wasn't stable, +0.015 was iffy. CPU VCCSA Offset Voltage is set to Auto. Idle voltage is 1.392~1.400 V and load voltage is up to 1.448~1.456 V as measured by CPU-Z, but I even saw it jump to 1.464 briefly while stress testing. This is a little higher than the 1.45 VCore max that I wanted for 24/7 use but this is also a 50% overclock on a hexa-core processor. I think these voltages should still be safe as my temperatures are still staying in the mid 80s under load at maximum.

Thanks!

Update: Flashed to 0901 BIOS. Now running the following settings:

  • CPU Clock Gen Filter: 20UF
  • Memory Frequency: DDR3-2133MHz
  • BCLK Skew: -2
  • PCIE Skew: -20
  • CPU Load-line Calibration: Ultra High
  • CPU Current Capability: 180%
  • CPU VCore Offset Voltage: +0.040
  • VTT CPU Voltage: Auto
  • 2nd VTTCPU Voltage: Auto
  • CPU VCCSA Manual Voltage: Auto
  • DRAM Voltage (CHA, CHB, CHC, CHD): 1.650
  • CPU PLL Voltage: Auto
  • CPU & PCIE Spread Spectrum: Both Disabled
  • CPU C3, C6, & C7 Report: All Disabled

CPU-Z is reporting 1.456~1.464 V load and 1.400~1.408 V idle. I won't worry about any differences in GFlops with LinX from here out as I am running a newer/different version of BIOS. I won't be able to notice any real world difference and if I really wanted higher scores in LinX I would just disable hyper-threading. For 24/7 usage I think I may run 4.5 GHz with 1.4 V max VCore under load as my temperatures stay about 10 °C cooler. To get 4.5 GHz stable is a breeze. I simply set CPU Core Offset Voltage to -0.005 and don't really have to change much else. I could just change the multiplier to 45 and leave everything else at the default setting to get 4.5 GHz stable with this board. The difference measured between 4.8 GHz and 4.5 GHz is about 2 GFlops with hyper-threading turned off under LinX but the difference in voltage is 0.050 volts and the difference in temperature is approximately 10 °C. thumb.gif

4.5 GHz Stable under LinX (Not final settings, may try reducing VCore more):
NIjB6.png

4.5 GHz Stable under Prime 95 (Not final settings, may try reducing VCore more):
tbLWZ.png
Edited by Improvidus - 12/15/11 at 9:05am
     
CPUMotherboardGraphicsRAM
Intel Core i7-3930K @ 4.8 GHz ASUS Rampage IV Extreme - LGA 2011 - X79 NVIDIA GTX 970 Mushkin Enhanced Redline 16GB (4 x 4GB) 240-Pin... 
Hard DriveHard DriveOptical DriveCooling
Corsair Force Series GT 120 GB SSD Samsung SpinPoint HD103SJ (RAID 0) ASUS 12x Blu-Ray Burner (BW-12B1ST) XSPC Rasa 750 RX240 WaterCooling Kit 
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Windows 10 x64 DELL UltraSharp 3007WFP-HC 30-inch Widescreen L... Samsung SyncMaster 204T 20-inch LCD Monitor (Bl... Filco Ninja Majestouch-2, NKR, Linear Action 
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Corsair Professional Series Gold 850-Watt (AX850) Fractal Design Arc Midi Black High Performance ... Logitech G500 Programmable Gaming Mouse PureTrak Stealth 
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Fluance XLHTB Surround Sound System ASUS Xonar DX 7.1 Channel PCI Express Sound Card 
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e8400 C0 ASUS P5Q Pro Turbo ASUS EAH6970 Mushkin 4GB (2 x 2GB) DDR2 800 
Hard DriveOptical DriveOSMonitor
HD103SJ 2TB RAID 0 (1TB x 2) ASUS DRW-24B1ST Windows 7 x64 Dell 3007WFP-HC & Samsung 204T 
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Logitech UltraX OCZ StealthXStream 700W ThermalTake Tsunami Logitech G500 
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CPUMotherboardGraphicsRAM
Intel Core i7-3930K @ 4.8 GHz ASUS Rampage IV Extreme - LGA 2011 - X79 NVIDIA GTX 970 Mushkin Enhanced Redline 16GB (4 x 4GB) 240-Pin... 
Hard DriveHard DriveOptical DriveCooling
Corsair Force Series GT 120 GB SSD Samsung SpinPoint HD103SJ (RAID 0) ASUS 12x Blu-Ray Burner (BW-12B1ST) XSPC Rasa 750 RX240 WaterCooling Kit 
OSMonitorMonitorKeyboard
Windows 10 x64 DELL UltraSharp 3007WFP-HC 30-inch Widescreen L... Samsung SyncMaster 204T 20-inch LCD Monitor (Bl... Filco Ninja Majestouch-2, NKR, Linear Action 
PowerCaseMouseMouse Pad
Corsair Professional Series Gold 850-Watt (AX850) Fractal Design Arc Midi Black High Performance ... Logitech G500 Programmable Gaming Mouse PureTrak Stealth 
AudioAudio
Fluance XLHTB Surround Sound System ASUS Xonar DX 7.1 Channel PCI Express Sound Card 
CPUMotherboardGraphicsRAM
e8400 C0 ASUS P5Q Pro Turbo ASUS EAH6970 Mushkin 4GB (2 x 2GB) DDR2 800 
Hard DriveOptical DriveOSMonitor
HD103SJ 2TB RAID 0 (1TB x 2) ASUS DRW-24B1ST Windows 7 x64 Dell 3007WFP-HC & Samsung 204T 
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