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I7 2700k overclocked to 4.2ghz, issue with cpu-z and coretemp showing different clocks.

post #1 of 8
Thread Starter 
Ok so ive had my i7 2700k for a couple of years now and always had a stable overclock on my ASRock extreme 4 gen 3 motherboard. Stable at 4.5ghz with an built in clocking profile. However my motherboard died so I had to buy a new one.

I purchased an EVGA z68 sli micro which doesnt have any built in clocking profiles. So I manually upped my multiplier to 42 for a clock of 4.2ghz and left my cpu voltage on auto. Its around 1.24v. This is stable and works fine. The bios reports 4200mhz.

The problem im having is with coretemp and cpu-z. They both report the cpu at 4290mhz and a multiplier of 43.

Anyone know why this is happening?
post #2 of 8
I'm not sure, but this might be due to the BCLK being at around 102.1 MHz.
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CPUMotherboardGraphicsRAM
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post #3 of 8
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

I'm not sure, but this might be due to the BCLK being at around 102.1 MHz.

In the bios the BCLK is showing as 100 with a multiplier of 42 for a total speed of 4200mhz

In CPU-z the BCLK is shown as 99.79 with a multiplier of 42 for a total speed of 4290.85mhz

In Core Temp the BCLK is shown as 99.77 with a multiplier of 42 for a total speed of 4290.20mhz


Its very odd, i assumed it would be a setting i didnt notice but from what I can see in the bios its all correct. PLL overvoltage did apply itself when i increased the multiplier over 40 (4ghz) if that changed anything.
post #4 of 8
Quote:
Originally Posted by Ubung View Post

In the bios the BCLK is showing as 100 with a multiplier of 42 for a total speed of 4200mhz

In CPU-z the BCLK is shown as 99.79 with a multiplier of 42 for a total speed of 4290.85mhz

In Core Temp the BCLK is shown as 99.77 with a multiplier of 42 for a total speed of 4290.20mhz


Its very odd, i assumed it would be a setting i didnt notice but from what I can see in the bios its all correct. PLL overvoltage did apply itself when i increased the multiplier over 40 (4ghz) if that changed anything.

Interesting. I don't know if this is due to Internal PLL Overvoltage.

Anyway, so wow: your multiplier really is somehow at 43 because that's the only way it would arrive at 4290.85 MHz from a BCLK of 99.79 MHz.
It's a computer!
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) 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 
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250 GB Samsung 840 EVO (C:) 250 GB Samsung 840 EVO (D:) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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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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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) 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 
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 #5 of 8
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

Interesting. I don't know if this is due to Internal PLL Overvoltage.

Anyway, so wow: your multiplier really is somehow at 43 because that's the only way it would arrive at 4290.85 MHz from a BCLK of 99.79 MHz.

Yeah i dont know much about pll overvoltage myself.

The BCLK shifts its value in CPU-z from 99.77 through to 99.79 which then causes the core speed value to fluctuate a bit as well. Core temp is locked at 99.77 x 43.

I mean from my perspective this hasnt stopped me doing anything. I mean i still get the performance boost and my temps are fine (64, 69, 70, 64 running prime95) but its very odd that the programs dont reflect the actual values in the bios. Which they did on my previous setup.

Thanks for the help so far.
Edited by Ubung - 8/14/13 at 6:30am
post #6 of 8
Wait, when you upgraded to this new motherboard, did you format and start over? Or, are you using the same installation of Windows from before? I mean, it could be a driver problem.
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) 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 
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... 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) 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 
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
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

Wait, when you upgraded to this new motherboard, did you format and start over? Or, are you using the same installation of Windows from before? I mean, it could be a driver problem.

No i didnt format. I used the Windows System Preparation Tool to keep the same windows installation. However i did totally remove my previous gpu drivers and reinstalled them.
post #8 of 8
Quote:
Originally Posted by Ubung View Post

No i didnt format. I used the Windows System Preparation Tool to keep the same windows installation. However i did totally remove my previous gpu drivers and reinstalled them.

I'm only talking about system drivers, like the ones for the CPU and the motherboard.

I'd like to try a trick that is normally used when installing a different CPU:
  1. Open Device Manager
  2. Expand "Processors"
  3. Right-click each one and choose Uninstall, confirming your choice each time
  4. Reboot and check what your software displays for a multiplier

Failing this, I wouldn't know what to do.
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.400-1.424V in Manual Mode) 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 
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 (1.400-1.424V in Manual Mode) 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 
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
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