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3770K @ 4.7ghz, Unusual Stability Test Results

post #1 of 4
Thread Starter 
I have a P8Z77-V PRO, and I used Asus's Auto-Tuning program to find a baseline overclock for my new 3770K chip. To my surprise, the software set the OC right at 4.7ghz, which is basically where I wanted to be anyway. I was hoping for 4.8ghz, but I think my chip puts out too much heat at the required voltages to try to go any farther. Perhaps I can experiment with some things and squeeze out another 100mHz...

Anyway, I checked out the system settings and found that the Asus utility set my Vcore to 1.42v. That is extremely high. It's dynamic, though, so most of the time my chip is only seeing around 1.32v unless under full load. Regardless, I wanted to see if I could do something about that Vcore to 1) help temps, and 2) extend the life of my chip. Much to my surprise, I found that I could run IBT at Max stress, Xtreme Stress mode without issue at 1.38v. I even ran at every stress mode from Standard back to Maximum just for fun and there were no issues. Naturally, this did wonders for my load temps.

I then switched to a blended Prime95 (27.7) test to check long-term benchmark system stability when something odd happened. The In-Place Large FFT portion of the test went off without a hitch, but when the Small FFT test kicked in, it causes insta-BSOD. I tried running the two tests separately and this is what happens every time. IBT, Large FFT tests are completely fine, but Small FFT causes insta-BSOD all the way up to 1.42v Vcore. Isn't this odd? I've never experienced stability test results like this before.

Is there a BIOS setting I need to change? Is Prime95 just acting wonky? Is Prime95 acting fine, but Small FFT stability not super important? Or is this simply an indication that my chip requires the higher Vcore setting applied by Asus's algorithm?
Edited by JazzMac251 - 1/26/13 at 12:06pm
post #2 of 4
First: You're using auto-tune. Not the best option. It's better to do your own searching and manually enter in your options.

Secondly, check this thread out. You may/may not have a bad chip. Read the whole first post and start your search for the most stable overclock.

http://www.overclock.net/t/1291703/ivy-bridge-overclocking-guide-asus-motherboards
White Flood
(18 items)
 
HP HPE-1418
(11 items)
 
 
CPUMotherboardGraphicsRAM
i5-3570K De-Lidded @4.5Ghz 1.33v ASUS P8Z77-V VK XFX Radeon R7770 G.Skill RipjawX (4x4) 
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ADATA SP900  WD Caviar Blue Seagate Cooler Mastery Hyper 212+ EVO 
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Noctura Nf-12 Windows 7 Ultimate HP 2007w Emerson 32" HDTV 
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AMD FX-6100 Gigabyte M3970AM-HP Radeon HD 7450 10GB PC3-10600 DDR3-1333 
Hard DriveOptical DriveOSMonitor
SATA HD 3.0Gb/s SuperMulti DVD Burner Drive Windows 7 Premium HP w1907 
KeyboardPowerCase
HP Keyboard ATX 300w Mid-size ATX 
CPUMotherboardGraphicsRAM
DIGIC4 Processor TTL-CT-SIR AF-dedicated CMOS sensor Digital Single Lens Reflex 18.7MP 3.7FPS 
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White Flood
(18 items)
 
HP HPE-1418
(11 items)
 
 
CPUMotherboardGraphicsRAM
i5-3570K De-Lidded @4.5Ghz 1.33v ASUS P8Z77-V VK XFX Radeon R7770 G.Skill RipjawX (4x4) 
Hard DriveHard DriveHard DriveCooling
ADATA SP900  WD Caviar Blue Seagate Cooler Mastery Hyper 212+ EVO 
CoolingOSMonitorMonitor
Noctura Nf-12 Windows 7 Ultimate HP 2007w Emerson 32" HDTV 
KeyboardPowerCaseMouse
I Stole One Seasonic 620w Modular PSU NZXT Switch 810 I Stole One 
Mouse PadAudio
My Desk Through MoBo 
CPUMotherboardGraphicsRAM
AMD FX-6100 Gigabyte M3970AM-HP Radeon HD 7450 10GB PC3-10600 DDR3-1333 
Hard DriveOptical DriveOSMonitor
SATA HD 3.0Gb/s SuperMulti DVD Burner Drive Windows 7 Premium HP w1907 
KeyboardPowerCase
HP Keyboard ATX 300w Mid-size ATX 
CPUMotherboardGraphicsRAM
DIGIC4 Processor TTL-CT-SIR AF-dedicated CMOS sensor Digital Single Lens Reflex 18.7MP 3.7FPS 
Hard DriveHard DriveOSMonitor
SDHC Class 10 SDHC Class 10 Magic Lantern 1.02 3" Rotating LCD 
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Battery Pack LP-E8 
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post #3 of 4
Thread Starter 
Quote:
Originally Posted by megawatz View Post

First: You're using auto-tune. Not the best option. It's better to do your own searching and manually enter in your options.

Secondly, check this thread out. You may/may not have a bad chip. Read the whole first post and start your search for the most stable overclock.

http://www.overclock.net/t/1291703/ivy-bridge-overclocking-guide-asus-motherboards

Regarding auto-tuning, I respectfully disagree. I think it has to do with what your end goal is. I've read that post and several others on the topic. The described method is great for trying to find the absolute upper limit at which your processor can perform, but, in my humble opinion, this is not the best way to go about setting up a dynamic overclock.

It's true that setting a manual VCC will allow you to better explore the upper limits of your chip. Doing so eliminates the many variables associated with potentially incompatible voltage-multiplier-frequency combinations as the chip cycles through lower multipliers when idling. Thing is, I don't want my Vcore pinned at max when idle, especially at the voltages I'm running when under load.

Setting up a dynamic overclock is far better, but it's also a pain in the ass. The Asus utility is nice because it gets you to within reach of your chip's upper limit very quickly and without much effort, and it does so using an offset overclock. I think It's nice to use that as a jumping off point, then continue to refine those results.

Do you have any thoughts about the unusual stress testing results? You said that you think my chip may be defective. What makes you say so?
post #4 of 4
Can you tell me what your BSOD was?


Download BlueScreenView and it will tell you.

Ex. 0x000000a0
White Flood
(18 items)
 
HP HPE-1418
(11 items)
 
 
CPUMotherboardGraphicsRAM
i5-3570K De-Lidded @4.5Ghz 1.33v ASUS P8Z77-V VK XFX Radeon R7770 G.Skill RipjawX (4x4) 
Hard DriveHard DriveHard DriveCooling
ADATA SP900  WD Caviar Blue Seagate Cooler Mastery Hyper 212+ EVO 
CoolingOSMonitorMonitor
Noctura Nf-12 Windows 7 Ultimate HP 2007w Emerson 32" HDTV 
KeyboardPowerCaseMouse
I Stole One Seasonic 620w Modular PSU NZXT Switch 810 I Stole One 
Mouse PadAudio
My Desk Through MoBo 
CPUMotherboardGraphicsRAM
AMD FX-6100 Gigabyte M3970AM-HP Radeon HD 7450 10GB PC3-10600 DDR3-1333 
Hard DriveOptical DriveOSMonitor
SATA HD 3.0Gb/s SuperMulti DVD Burner Drive Windows 7 Premium HP w1907 
KeyboardPowerCase
HP Keyboard ATX 300w Mid-size ATX 
CPUMotherboardGraphicsRAM
DIGIC4 Processor TTL-CT-SIR AF-dedicated CMOS sensor Digital Single Lens Reflex 18.7MP 3.7FPS 
Hard DriveHard DriveOSMonitor
SDHC Class 10 SDHC Class 10 Magic Lantern 1.02 3" Rotating LCD 
Power
Battery Pack LP-E8 
  hide details  
Reply
White Flood
(18 items)
 
HP HPE-1418
(11 items)
 
 
CPUMotherboardGraphicsRAM
i5-3570K De-Lidded @4.5Ghz 1.33v ASUS P8Z77-V VK XFX Radeon R7770 G.Skill RipjawX (4x4) 
Hard DriveHard DriveHard DriveCooling
ADATA SP900  WD Caviar Blue Seagate Cooler Mastery Hyper 212+ EVO 
CoolingOSMonitorMonitor
Noctura Nf-12 Windows 7 Ultimate HP 2007w Emerson 32" HDTV 
KeyboardPowerCaseMouse
I Stole One Seasonic 620w Modular PSU NZXT Switch 810 I Stole One 
Mouse PadAudio
My Desk Through MoBo 
CPUMotherboardGraphicsRAM
AMD FX-6100 Gigabyte M3970AM-HP Radeon HD 7450 10GB PC3-10600 DDR3-1333 
Hard DriveOptical DriveOSMonitor
SATA HD 3.0Gb/s SuperMulti DVD Burner Drive Windows 7 Premium HP w1907 
KeyboardPowerCase
HP Keyboard ATX 300w Mid-size ATX 
CPUMotherboardGraphicsRAM
DIGIC4 Processor TTL-CT-SIR AF-dedicated CMOS sensor Digital Single Lens Reflex 18.7MP 3.7FPS 
Hard DriveHard DriveOSMonitor
SDHC Class 10 SDHC Class 10 Magic Lantern 1.02 3" Rotating LCD 
Power
Battery Pack LP-E8 
  hide details  
Reply
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