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New i5 2500K owner, need help OC'ing

post #1 of 19
Thread Starter 
I finally upgraded from my old C2D E6850 yesterday to the i5 2500K. I am very new to overclocking and understand that the rules have changed somewhat with the Sandy Bridge architecture.

My rig specs:
CPU: Intel Core i5 2500K
Mobo: Asus Asrock Extreme3 Gen3
RAM: GeIL 4GB DDR3
Cooling: Noctua NH-U9B se2

So far i have my CPU overclocked to 4.3GHz and have manually set the Vcore to 1.325V. The only parameters i've changed are the multiplier and the Vcore (manual). Now my biggest concern is the different VID readings that CPU-Z and CoreTemp are showing me. On full load CPU-Z is showing me around 1.29v whereas CoreTemp seems to fluctuate around 1.34-1.37v Why aren't both of them reflecting the Vcore that i've set on the BIOS (1.325V)? My temperatures are 50 celsius max so far. I want to try pushing it to 4.5GHz later but i need to understand what's happening with my voltages :/
post #2 of 19
Hey metroidslayer! Don't be alarmed! Are you using CPU-Z version 1.57.1? I believe that, and any version after, give the most accurate vCore readings on the 2500K. Just ignore what you see in CoreTemp or RealTemp as far as vCore readings go.
 
dm1z
(13 items)
 
 
CPUMotherboardGraphicsRAM
2500K P8P67 Evo MSI RX 480 Sniper|1600 
Hard DriveCoolingOSMonitor
Intel 330 Hyper 212+ Win8-x64 P2310H + P2311H 
PowerCase
CMPSU-650TX NZXT S340 
CPUGraphicsRAMHard Drive
Dual-Core E-350 Radeon HD 6310M 3GB DDR3 HDD 
Optical DriveOSMonitorMouse
HP External BluRay/DVD Windows 7 Home Premium 11.6" LED (1366 x 768) Touch 
CPUMotherboardGraphicsRAM
Phenom II 840T 880GM-LE GTS 450 Corsair XMS2 2x2GB 
Hard DriveOptical DriveCoolingOS
Caviar Green 1TB LG Scythe KATANA 3 Windows 7 Professional 32-bit 
PowerCase
CX430 V2 Dell 
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dm1z
(13 items)
 
 
CPUMotherboardGraphicsRAM
2500K P8P67 Evo MSI RX 480 Sniper|1600 
Hard DriveCoolingOSMonitor
Intel 330 Hyper 212+ Win8-x64 P2310H + P2311H 
PowerCase
CMPSU-650TX NZXT S340 
CPUGraphicsRAMHard Drive
Dual-Core E-350 Radeon HD 6310M 3GB DDR3 HDD 
Optical DriveOSMonitorMouse
HP External BluRay/DVD Windows 7 Home Premium 11.6" LED (1366 x 768) Touch 
CPUMotherboardGraphicsRAM
Phenom II 840T 880GM-LE GTS 450 Corsair XMS2 2x2GB 
Hard DriveOptical DriveCoolingOS
Caviar Green 1TB LG Scythe KATANA 3 Windows 7 Professional 32-bit 
PowerCase
CX430 V2 Dell 
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post #3 of 19
Thread Starter 
Quote:
Originally Posted by onoz View Post
Hey metroidslayer! Don't be alarmed! Are you using CPU-Z version 1.57.1? I believe that, and any version after, give the most accurate vCore readings on the 2500K. Just ignore what you see in CoreTemp or RealTemp as far as vCore readings go.
Thanks for the feedback! I will need to check on that when I get home But if I've set my vcore in the BIOS to 1.325v then why is CPU-Z showing a lower volt at full CPU load? Could this be something to do with vdroop? I'm not experienced in this at all as I've just started doing my homework yesterday ._.
post #4 of 19
Quote:
Originally Posted by metroidslayer View Post
Thanks for the feedback! I will need to check on that when I get home But if I've set my vcore in the BIOS to 1.325v then why is CPU-Z showing a lower volt at full CPU load? Could this be something to do with vdroop? I'm not experienced in this at all as I've just started doing my homework yesterday ._.
Hey don't worry about it. I'm not an expert, nor am I even "decent" by any means. I just know how to up the multiplier and up the voltage. As far as I understand though, vdroop should NOT be causing that big of a difference in voltage.

First things first; let's figure out whether you've got the latest version of CPU-Z. If it turns out you do, I might have to hand this over to more experienced Sandy Bridge OC'ers. If you don't, download it here.
 
dm1z
(13 items)
 
 
CPUMotherboardGraphicsRAM
2500K P8P67 Evo MSI RX 480 Sniper|1600 
Hard DriveCoolingOSMonitor
Intel 330 Hyper 212+ Win8-x64 P2310H + P2311H 
PowerCase
CMPSU-650TX NZXT S340 
CPUGraphicsRAMHard Drive
Dual-Core E-350 Radeon HD 6310M 3GB DDR3 HDD 
Optical DriveOSMonitorMouse
HP External BluRay/DVD Windows 7 Home Premium 11.6" LED (1366 x 768) Touch 
CPUMotherboardGraphicsRAM
Phenom II 840T 880GM-LE GTS 450 Corsair XMS2 2x2GB 
Hard DriveOptical DriveCoolingOS
Caviar Green 1TB LG Scythe KATANA 3 Windows 7 Professional 32-bit 
PowerCase
CX430 V2 Dell 
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dm1z
(13 items)
 
 
CPUMotherboardGraphicsRAM
2500K P8P67 Evo MSI RX 480 Sniper|1600 
Hard DriveCoolingOSMonitor
Intel 330 Hyper 212+ Win8-x64 P2310H + P2311H 
PowerCase
CMPSU-650TX NZXT S340 
CPUGraphicsRAMHard Drive
Dual-Core E-350 Radeon HD 6310M 3GB DDR3 HDD 
Optical DriveOSMonitorMouse
HP External BluRay/DVD Windows 7 Home Premium 11.6" LED (1366 x 768) Touch 
CPUMotherboardGraphicsRAM
Phenom II 840T 880GM-LE GTS 450 Corsair XMS2 2x2GB 
Hard DriveOptical DriveCoolingOS
Caviar Green 1TB LG Scythe KATANA 3 Windows 7 Professional 32-bit 
PowerCase
CX430 V2 Dell 
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post #5 of 19
Thread Starter 
Thx, I will check it out later
post #6 of 19
cpuz is being weird for me as well. I have my vcore @ 1.38 but it's showing 1.056 in cpuz and it never changes, this is with version 1.58
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500K Gigabyte GA-Z68X-UD3H Sapphire 290 Tri X 4GB 2x8GB Corair Vengeance Pro DDR3 1600 
Hard DriveOptical DriveOSMonitor
120GB Kingston V300 / WD-B 500GB / WD-G 2TB LG 12x DVD-RW Windows 7 Acer K272HUL 
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Logitech G15 v2.0 Antec Gamer Series 900w CoolerMaster HAF 922 Logitech G700s 
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SteelSeries 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500K Gigabyte GA-Z68X-UD3H Sapphire 290 Tri X 4GB 2x8GB Corair Vengeance Pro DDR3 1600 
Hard DriveOptical DriveOSMonitor
120GB Kingston V300 / WD-B 500GB / WD-G 2TB LG 12x DVD-RW Windows 7 Acer K272HUL 
KeyboardPowerCaseMouse
Logitech G15 v2.0 Antec Gamer Series 900w CoolerMaster HAF 922 Logitech G700s 
Mouse Pad
SteelSeries 
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post #7 of 19
Quote:
Originally Posted by Meta|Gear View Post
cpuz is being weird for me as well. I have my vcore @ 1.38 but it's showing 1.056 in cpuz and it never changes, this is with version 1.58
Hmm... In that case, I have no idea what's happening...
 
dm1z
(13 items)
 
 
CPUMotherboardGraphicsRAM
2500K P8P67 Evo MSI RX 480 Sniper|1600 
Hard DriveCoolingOSMonitor
Intel 330 Hyper 212+ Win8-x64 P2310H + P2311H 
PowerCase
CMPSU-650TX NZXT S340 
CPUGraphicsRAMHard Drive
Dual-Core E-350 Radeon HD 6310M 3GB DDR3 HDD 
Optical DriveOSMonitorMouse
HP External BluRay/DVD Windows 7 Home Premium 11.6" LED (1366 x 768) Touch 
CPUMotherboardGraphicsRAM
Phenom II 840T 880GM-LE GTS 450 Corsair XMS2 2x2GB 
Hard DriveOptical DriveCoolingOS
Caviar Green 1TB LG Scythe KATANA 3 Windows 7 Professional 32-bit 
PowerCase
CX430 V2 Dell 
  hide details  
Reply
 
dm1z
(13 items)
 
 
CPUMotherboardGraphicsRAM
2500K P8P67 Evo MSI RX 480 Sniper|1600 
Hard DriveCoolingOSMonitor
Intel 330 Hyper 212+ Win8-x64 P2310H + P2311H 
PowerCase
CMPSU-650TX NZXT S340 
CPUGraphicsRAMHard Drive
Dual-Core E-350 Radeon HD 6310M 3GB DDR3 HDD 
Optical DriveOSMonitorMouse
HP External BluRay/DVD Windows 7 Home Premium 11.6" LED (1366 x 768) Touch 
CPUMotherboardGraphicsRAM
Phenom II 840T 880GM-LE GTS 450 Corsair XMS2 2x2GB 
Hard DriveOptical DriveCoolingOS
Caviar Green 1TB LG Scythe KATANA 3 Windows 7 Professional 32-bit 
PowerCase
CX430 V2 Dell 
  hide details  
Reply
post #8 of 19
Thread Starter 
I also have HWmonitor and it's showing the same Vcores as CPU-Z. I just don't know which to trust lol
post #9 of 19
Quote:
Originally Posted by Meta|Gear View Post
cpuz is being weird for me as well. I have my vcore @ 1.38 but it's showing 1.056 in cpuz and it never changes, this is with version 1.58
1.056v is the idle vcore of your chip. Try running Prime95 or IBT and you'll see the load vcore.
post #10 of 19
Thread Starter 
What Vcore would you recommend for a stable 4.5GHz overclock? Do i need to mess around with LLC settings? So far its on '5' under BIOS settings.
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