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Need help overclocking an i7 2600k 3.4GHz

post #1 of 5
Thread Starter 
Hello there OC community biggrin.gif

As the title implies, I am in need of assistance regarding overclocking my CPU.
First off, things you need to know:
  1. I am relatively new to the whole overclocking scene, so forgive me if I ask 'easy' questions
  2. I am aware that every part is different in oc'ing
  3. Sadly this is not my only issue atm, so here is the link the GPU overclocking post in the appropriate forum.
  4. This is the post that I will be referring to later on: Water cooling my rig
  5. Any help or input is greatly appreciated smile.gif

So let's get to it: I have been messing around with oc'ing my CPU in the last couple of days. Following these relatively old, yet more or less still relevant guides (I hope so at least haha): Info on the OC forums and a talented youtubers advice. As stated before, I am in no means experienced in this area, so some information given by these two sources may be completely wrong or outdated.

Following the steps from these two, I have accessed the BIOS and adjusted the relevant settings and have spent my whole afternoon stress testing the CPU under 100% load (multiple tests ofc). The problem that I am facing is that I cannot seem to find an appropriate voltage for my overclock. An important thing is that I am currently limited to air cooling, so I am hitting the 80-85 degree Celsius mark pretty quickly, but this is soon about to change as I have linked in number 4. above.

What I have done so far using Prime95:
My CPU is stable at:
1.2V with 41 multiplier
1.37V with 43 m

Unstable:
1.2V 42m
1.35V 43m
1.365V 43m
1.385V 43m
1.4V 43m

Too hot:
1.4V 45m (only 1344 test)
1.4V 44m (both tests)

As you can see I am not trying to overclock beyond the 4.5GHz mark with my air cooling, which already seems to be too hot.

The CPU passed 30min of testing at 1.37V with a 43m, yet failed the test right afterward with 1.365V and 43m. This gave me the point of lowest voltage possible (I thought at least -.-), so I upped the voltage the suggested 4 increments to 1.385V at 43m. The whole system crashed within the first 10min. I have no idea why, so I upped to voltage to an over the top 1.4V at 43m and the system crashed again.

Now all I have heard people talk about when they mention 'crashing' with CPU overclocks is "Bluescreening" or freezing. For me the whole system just shuts down.

After all this ramble and infos here are my questions:
  • I am wondering is it maybe the motherboard that causes this?
  • Am I doing something very obvious wrong?
  • Can it be that it is just my CPU that is so voltage demanding, since very piece of hardware differs?

One thing to note: I am planning on going higher than 4.5GHz, which will be possible after I have implemented the wc mentioned in 4. in my rig, so do not hesitate suggesting overclock tips above that level wink.gif

Thanks for reading,
Mr KJ
Edited by MrKJ - 6/29/13 at 11:50am
Monsta
(20 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 2600K P8P67 DELUXE EVGA GTX-780 Dual Classified ACX (GK110, 3GB) Kingston  
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Kingston  Kingston  Kingston  Seagate ST310005 
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Seagate ST31000524AS ASUS DRW-24B3ST Crosair Cooling Hydro Series H60 High-Performan... Windows 7 Ultimate (x64) 
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BenQ XL2720Z 27" G15 Logitech Gaming keyboard (2009) HuntKey X7 900 (Total Power 900W) NZXT Phantom (Black) 
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Monsta
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RAMRAMRAMHard Drive
Kingston  Kingston  Kingston  Seagate ST310005 
Hard DriveOptical DriveCoolingOS
Seagate ST31000524AS ASUS DRW-24B3ST Crosair Cooling Hydro Series H60 High-Performan... Windows 7 Ultimate (x64) 
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BenQ XL2720Z 27" G15 Logitech Gaming keyboard (2009) HuntKey X7 900 (Total Power 900W) NZXT Phantom (Black) 
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post #2 of 5
Try only raising the multiplier in your bios, leave voltage settings and everything untouched, the motherboard will decide an appropriate voltage that should keep the system stable always. Personally, this is how i overclocked my 2500k after numerous attempts at setting the voltage and other OC settings myself wouldn't work.

Run a stress test, and note what voltage your CPU is running at under 100% load. Use a couple of applications to check what voltage it's running at, CPUID HWMonitor and AIDA64 report quite accurately in my experience. If it's too high or running too hot, then try setting the voltage manually to a number slightly lower.
Good luck.
   
Pink Power
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Intel Core i5 2500k @ 4.3ghz 1.34v Gigabyte Z68XP-UD3R Gigabyte GTX 760 OC Kingston HyperX t1 8GB 1866 MHZ 
Hard DriveHard DriveOptical DriveCooling
Western Digital Green 2TB Intel 520 SSD Samsung SH-224DB DVD Burner Corsair H105 
CoolingCoolingOSPower
2x Enermax T.B Apollish Twister 140mm 2x NZXT FN 120RB Windows 7 Ultimate x64 Thermaltake ToughPower XT 775W 
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Hard DriveOptical DriveOSPower
WD Caviar Blue 500GB LG External DVD Burner Win7 Ultimate 32bit 680W ATX Power Supply 
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CPUMotherboardGraphicsRAM
Intel i3 4170 AsRock B85M Pro3 ASUS Radeon R7 370 Kingston HyperX Fury 
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Pink Power
(11 items)
 
CPUMotherboardGraphicsRAM
Intel Core i5 2500k @ 4.3ghz 1.34v Gigabyte Z68XP-UD3R Gigabyte GTX 760 OC Kingston HyperX t1 8GB 1866 MHZ 
Hard DriveHard DriveOptical DriveCooling
Western Digital Green 2TB Intel 520 SSD Samsung SH-224DB DVD Burner Corsair H105 
CoolingCoolingOSPower
2x Enermax T.B Apollish Twister 140mm 2x NZXT FN 120RB Windows 7 Ultimate x64 Thermaltake ToughPower XT 775W 
CaseOtherOtherOther
NZXT Phantom 410 Leadtek DTV1000s HD TV Tuner/Capture Card ASUS PCE-N15 Wireless Adapter NZXT Sleeved Lighting Kit 100cm 
CPUMotherboardGraphicsRAM
Intel G630 Gigabyte GA-H61M-DS2 POV GT 430 2GB Strontium 4GB DDR3 
Hard DriveOptical DriveOSPower
WD Caviar Blue 500GB LG External DVD Burner Win7 Ultimate 32bit 680W ATX Power Supply 
CaseOther
K-Mart Fish Tank Blue LED Strip 
CPUMotherboardGraphicsRAM
Intel i3 4170 AsRock B85M Pro3 ASUS Radeon R7 370 Kingston HyperX Fury 
Hard DriveHard DriveOSPower
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post #3 of 5
Thread Starter 
Quote:
Originally Posted by PoisonousRakija View Post

Try only raising the multiplier in your bios, leave voltage settings and everything untouched, the motherboard will decide an appropriate voltage that should keep the system stable always. Personally, this is how i overclocked my 2500k after numerous attempts at setting the voltage and other OC settings myself wouldn't work.

Run a stress test, and note what voltage your CPU is running at under 100% load. Use a couple of applications to check what voltage it's running at, CPUID HWMonitor and AIDA64 report quite accurately in my experience. If it's too high or running too hot, then try setting the voltage manually to a number slightly lower.
Good luck.

So only change the multiplier alone? Is that not going to cause any issues/ be not as efficient as it could be? For instance the RAM frequency, doesn't that optimize it even further? And I have heard that the mobo quite often choses voltages higher than needed, and since I am currently running on an air cooled rig (not for long anymore though hehe) I am kinda limited with my temps.
I'll try changing only that then and get back to you!

I am using CoreTemp, CPUID and another logitech keyboard app (guessing it is the most unreliable out of them) to monitor the temps and voltage.
Basically mess with the multiplier alone till I have reached the level I want it at, check temps and voltage and try running at a lower voltage if possible?

Also, could you elaborate a bit more on the Mobo taking over the rest? I do see that a lot of settings are 'Automatic', but as mentioned before I don't quite get what the RAM frequency then does for instance.

Thanks!
Monsta
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CPUMotherboardGraphicsRAM
Intel Core i7 2600K P8P67 DELUXE EVGA GTX-780 Dual Classified ACX (GK110, 3GB) Kingston  
RAMRAMRAMHard Drive
Kingston  Kingston  Kingston  Seagate ST310005 
Hard DriveOptical DriveCoolingOS
Seagate ST31000524AS ASUS DRW-24B3ST Crosair Cooling Hydro Series H60 High-Performan... Windows 7 Ultimate (x64) 
MonitorKeyboardPowerCase
BenQ XL2720Z 27" G15 Logitech Gaming keyboard (2009) HuntKey X7 900 (Total Power 900W) NZXT Phantom (Black) 
MouseMouse PadAudioOther
Logitech G502 PROTEUS CORE Noteblock.. Logitech Z906 AKG Gaming Headphones 
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Monsta
(20 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 2600K P8P67 DELUXE EVGA GTX-780 Dual Classified ACX (GK110, 3GB) Kingston  
RAMRAMRAMHard Drive
Kingston  Kingston  Kingston  Seagate ST310005 
Hard DriveOptical DriveCoolingOS
Seagate ST31000524AS ASUS DRW-24B3ST Crosair Cooling Hydro Series H60 High-Performan... Windows 7 Ultimate (x64) 
MonitorKeyboardPowerCase
BenQ XL2720Z 27" G15 Logitech Gaming keyboard (2009) HuntKey X7 900 (Total Power 900W) NZXT Phantom (Black) 
MouseMouse PadAudioOther
Logitech G502 PROTEUS CORE Noteblock.. Logitech Z906 AKG Gaming Headphones 
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post #4 of 5
Quote:
Originally Posted by MrKJ View Post

So only change the multiplier alone? Is that not going to cause any issues/ be not as efficient as it could be? For instance the RAM frequency, doesn't that optimize it even further? And I have heard that the mobo quite often choses voltages higher than needed, and since I am currently running on an air cooled rig (not for long anymore though hehe) I am kinda limited with my temps.
I'll try changing only that then and get back to you!

I am using CoreTemp, CPUID and another logitech keyboard app (guessing it is the most unreliable out of them) to monitor the temps and voltage.
Basically mess with the multiplier alone till I have reached the level I want it at, check temps and voltage and try running at a lower voltage if possible?

Also, could you elaborate a bit more on the Mobo taking over the rest? I do see that a lot of settings are 'Automatic', but as mentioned before I don't quite get what the RAM frequency then does for instance.

Thanks!

Yep, the way i OC'd my 2500k after i couldn't set manual voltage and offset and stuff was to raise the multiplier (i couldn't go further than x43 with auto or manual setting for some reason) and in the voltage settings i set VCore to 'Normal'.
If you have a Gigabyte Z68 mobo, you should be able to set the VCore to 'Auto', 'Normal' or a manual number.

For me, 'Normal' VCore was better than 'Auto'. Yes, it's quite possible that the mobo can set you a VCore that's too high, but in my case i reckon 1.34v for 4.3Ghz isn't all too bad.

What sort of mobo are you using, and what was your VCore when you only raised the multiplier?
Im not sure what mobo you have, but have a look at what VCore settings are avail. If there's anything other than 'Auto' i say give it a shot.

As for RAM Speed, i dont believe adjusting your multiplier will affect RAM speed as far as i know.
If you have high speed RAM then enabling XMP in your BIOS settings will set it to the advertised speed automatically.
Edited by PoisonousRakija - 7/1/13 at 3:34pm
   
Pink Power
(11 items)
 
CPUMotherboardGraphicsRAM
Intel Core i5 2500k @ 4.3ghz 1.34v Gigabyte Z68XP-UD3R Gigabyte GTX 760 OC Kingston HyperX t1 8GB 1866 MHZ 
Hard DriveHard DriveOptical DriveCooling
Western Digital Green 2TB Intel 520 SSD Samsung SH-224DB DVD Burner Corsair H105 
CoolingCoolingOSPower
2x Enermax T.B Apollish Twister 140mm 2x NZXT FN 120RB Windows 7 Ultimate x64 Thermaltake ToughPower XT 775W 
CaseOtherOtherOther
NZXT Phantom 410 Leadtek DTV1000s HD TV Tuner/Capture Card ASUS PCE-N15 Wireless Adapter NZXT Sleeved Lighting Kit 100cm 
CPUMotherboardGraphicsRAM
Intel G630 Gigabyte GA-H61M-DS2 POV GT 430 2GB Strontium 4GB DDR3 
Hard DriveOptical DriveOSPower
WD Caviar Blue 500GB LG External DVD Burner Win7 Ultimate 32bit 680W ATX Power Supply 
CaseOther
K-Mart Fish Tank Blue LED Strip 
CPUMotherboardGraphicsRAM
Intel i3 4170 AsRock B85M Pro3 ASUS Radeon R7 370 Kingston HyperX Fury 
Hard DriveHard DriveOSPower
Toshiba 500GB SATA3 Sandisk SSD Plus Windows 7 Ultimate Antec VPF550 550w 
CaseOther
Bitfenix Shinobi (Pink) 2x 30cm Pink LED Strips 
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Pink Power
(11 items)
 
CPUMotherboardGraphicsRAM
Intel Core i5 2500k @ 4.3ghz 1.34v Gigabyte Z68XP-UD3R Gigabyte GTX 760 OC Kingston HyperX t1 8GB 1866 MHZ 
Hard DriveHard DriveOptical DriveCooling
Western Digital Green 2TB Intel 520 SSD Samsung SH-224DB DVD Burner Corsair H105 
CoolingCoolingOSPower
2x Enermax T.B Apollish Twister 140mm 2x NZXT FN 120RB Windows 7 Ultimate x64 Thermaltake ToughPower XT 775W 
CaseOtherOtherOther
NZXT Phantom 410 Leadtek DTV1000s HD TV Tuner/Capture Card ASUS PCE-N15 Wireless Adapter NZXT Sleeved Lighting Kit 100cm 
CPUMotherboardGraphicsRAM
Intel G630 Gigabyte GA-H61M-DS2 POV GT 430 2GB Strontium 4GB DDR3 
Hard DriveOptical DriveOSPower
WD Caviar Blue 500GB LG External DVD Burner Win7 Ultimate 32bit 680W ATX Power Supply 
CaseOther
K-Mart Fish Tank Blue LED Strip 
CPUMotherboardGraphicsRAM
Intel i3 4170 AsRock B85M Pro3 ASUS Radeon R7 370 Kingston HyperX Fury 
Hard DriveHard DriveOSPower
Toshiba 500GB SATA3 Sandisk SSD Plus Windows 7 Ultimate Antec VPF550 550w 
CaseOther
Bitfenix Shinobi (Pink) 2x 30cm Pink LED Strips 
  hide details  
Reply
post #5 of 5
Your high temps will prevent a stable overclock. Try to keep it below ~80c. I have screen shots of my 2600k stable at 5Ghz on an Asus board Z68 (very similar bios) if you want to give you some idea of things you can change though it really is dependant on your piece of silicon.
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