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Increase voltage?

post #1 of 10
Thread Starter 
Got my new PSU a couple of days ago so wanted to try to get SMP going again. Got to 20% and then got 'unstable_machine' and the client stopped. I've increased voltage from 1.225V to 1.25V in bios, although cpu-z shows it as 1.232V. Is this a good idea? What's a safe voltage to run? I wonder what else could cause it to crash.
Edited by Ordinary_Dream - 6/9/10 at 2:32pm
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post #2 of 10
Quote:
Originally Posted by Ordinary_Dream View Post
Got my new PSU a couple of days ago so wanted to try to get SMP going again. Got to 20% and then got 'unstable_machine' and the client stopped. I've increased voltage from 1.225V to 1.25V in bios, although cpu-z shows it as 1.232V. Is this a good idea? What's a safe voltage to run? I wonder what else could cause it to crash.
Is anything in your system overclocked? If so, what's overclocked and what are the details of those settings?

As for a safe voltage, Intel says that about 1.45V is about the absolute maximum for this CPU.
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post #3 of 10
Thread Starter 
Hi, no nothing's overclocked, I wanted to make sure I had a stable rig for folding first, then go for it.
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post #4 of 10
Thread Starter 
Any suggestions?
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post #5 of 10
Quote:
Originally Posted by Ordinary_Dream View Post
Any suggestions?
I apologize for the delay.

If it were me, then I would set the BIOS to the board's factory default values and then run the SMP client again.
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Hard DriveHard DriveHard DriveOptical Drive
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Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #6 of 10
try TwoCables suggestion; try to see what volt it needs to make that stable.

in my case i needed 1.25 volts for my 3.8ghz HT on OC (normally if gaming i would only need 1.25v for my 4.2ghz OC) but folding increases/taxes your cpu than normal.
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post #7 of 10
Your system will be fine at that voltage. Follow the above advice about going with 'bios defaults' and check to see if your system is stable with Prime95 Blend on 10m intervals. You can see there where your system is failing out and we can start to check it out there.
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post #8 of 10
Thread Starter 
Ok, ran Prime95 blend for one hour with no problems. (I've increased the voltage to 1.275 in Bios). Gonna crank up the client again, but need to get a new WU because I won't be able to finish current one before deadline -client hasn't been running in the last couple of days. Do I just delete the work folder to do that?

Still wondering why bios and cpu-z report different voltages, with 1.275V set in bios cpu-z reports 1.264V. Which is most accurate?

Thanks for everyone's help
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post #9 of 10
the bios is the most accurate, the cpu-z and bios difference is the vdrop. or voltage drop.
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post #10 of 10
Quote:
Originally Posted by Ordinary_Dream View Post
Ok, ran Prime95 blend for one hour with no problems. (I've increased the voltage to 1.275 in Bios). Gonna crank up the client again, but need to get a new WU because I won't be able to finish current one before deadline -client hasn't been running in the last couple of days. Do I just delete the work folder to do that?

Still wondering why bios and cpu-z report different voltages, with 1.275V set in bios cpu-z reports 1.264V. Which is most accurate?

Thanks for everyone's help
The idle voltage is the result of vDrop, and the full load voltage is the result of vDroop. Both the idle and load voltages are the actual voltages running through the CPU. This means that the selected voltage in the BIOS isn't what's actually running through the CPU.

Both vDrop and vDroop are normal and are an intentional design created by Intel. Therefore, no attempt should ever be made to change its behavior.
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
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