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Overclocking my i5-2500K

post #1 of 14
Thread Starter 
After being busy with work and stuff, I'm finally ready to overclock my system now. As recommended by many threads, here are my current settings:

Ai Tweaker

Ai Overclock Tuner - Manual
BCLK/PCIE Frequency - 100.0
Turbo Ratio - By All Cores
By All Cores (Can Adjust in OS) - Auto
Internal PLL Overvoltage - Disabled
Memory Frequency - Auto
iGPU Max. Frequency - Auto
EPU Power Sabing Mode - Disabled
DRAM Timing Control - everything at Auto

CPU Power Management
CPU Ratio - Auto
Enhanced Intel Speedstep Technology - Enabled
Turbo Mode - Enabled
Turbo Mode Parameters - everything at Auto

DIGI + VRM
Load-line Calibration - Ultra High
VRM Frequency - Manual
VRM Fixed Frequency Mode - 350
Phase Control - Extreme
Duty Control - Extreme
CPU Current Capability - 140%
iGPU Load-line Calibration - Auto
iGPU Current Capability - 100%

CPU Voltage - Manual Mode
CPU Manual Voltage - Auto
iGPU Offset Mode Sign - +
IGPU Offset Voltage - Auto
DRAM Voltage - 1.5 (I have 1.5V 4x2GB RAM modules)
VCCIO Voltage - Auto
CPU PLL Voltage - Auto
PCH Voltage - Auto
DRAM Data/Ctrl REF Voltage on CHA/CHB - everything at Auto
CPU Spread Spectrum - Enabled



Advanced

CPU Configuration
CPU Ratio - Auto
Intel Adaptive Thermal Monitor - Enabled
Active Processor Cores - All
Limite CPUID Maximum - Disabled
Execute Disable Bit - Enabled
Intel Virtualization Technology - Disabled
Enhanced Intel Speedstep Technology - Enabled
Turbo Mode - Enabled
CPU C1E - Emabled
CPU C3 Report - Auto
CPU C6 - Report


My target frequency now is whatever is the max it will get as long as my max Vcore is 1.5V and my temps 85C tops. I don't know if these info is important but I can boot my system at 50x multiplier without enabling PLL overvoltage.

Questions:
1.) Where is the VCCSA Voltage Option? Why can't I seem to find it in my settings?
2.) At what multiplier should I set my system WHEN looking for the sweet spots for VCCIO and PLL voltages?
3.) Where do I start in optimizing VCCIO, PLL, and Vcore voltages?
4.) Does anyone tweak their PCH voltage as well?

@munaim1

I hope you can guide me though this. I have read a lot of your guides including everything about x124 BSODs but I think I really need your help on this. Can you direct me on what to do?

Thank you very much.
post #2 of 14
Start with PLL at around 1.7v, people say 1.1v for VCCIO, although I've noticed no difference. Adjust vcore as needed. Also a note on LLC, I've found ultra high LLC to lead to 124 BSOD. Here's my thinking on why:

"I noticed I was BSODing when gaming and when Idle/browsing the internet, NOT when stress testing. With this observation, I came to the conclusion that my system was BSODing when the multiplier was rasied to MAX but the processor wasn't quite at full load. I don't think the mobo was supplying enough power to the proc under light to moderate load scenarios. When LLC is on ultra, the core voltage increases with processor load, being at the highest when the system is at full load. When LLC is not on, or on a lower setting, the processor pumps the most volts into the processor before full load. So when you find that you're proc is stable @ 1.35v full load and LLC is on ultra, during light loading it will still be running at the overclocked speed but with less volts going into it causing instability. LLC being lower gives to a cushion to fall on in a sense, for example, if your proc is stable @ 1.35v full load(accounting for vdroop) and LLC is off, before it hits full load the volts are going to be around 1.37 or so. Therefore the unstable area when the processor is at a moderate load disappears."
post #3 of 14
Thread Starter 
Quote:
Originally Posted by Smykster View Post

Start with PLL at around 1.7v, people say 1.1v for VCCIO, although I've noticed no difference. Adjust vcore as needed. Also a note on LLC, I've found ultra high LLC to lead to 124 BSOD. Here's my thinking on why:
"I noticed I was BSODing when gaming and when Idle/browsing the internet, NOT when stress testing. With this observation, I came to the conclusion that my system was BSODing when the multiplier was rasied to MAX but the processor wasn't quite at full load. I don't think the mobo was supplying enough power to the proc under light to moderate load scenarios. When LLC is on ultra, the core voltage increases with processor load, being at the highest when the system is at full load. When LLC is not on, or on a lower setting, the processor pumps the most volts into the processor before full load. So when you find that you're proc is stable @ 1.35v full load and LLC is on ultra, during light loading it will still be running at the overclocked speed but with less volts going into it causing instability. LLC being lower gives to a cushion to fall on in a sense, for example, if your proc is stable @ 1.35v full load(accounting for vdroop) and LLC is off, before it hits full load the volts are going to be around 1.37 or so. Therefore the unstable area when the processor is at a moderate load disappears."

Thanks for the info although I've read in other threads a recommendation of starting at 1.4. I just don't know which voltage is to stay fixed while making one variable in looking for the sweet spot. You can't change all three simultaneously or you'll go nuts. There's got to be two voltages fixed or Auto (I don't know) while changing the other one.

Regarding Ultra High LLC, all you need to is turn off C3 and C6 power states in BIOS in order to solve that light load problem. If this still doesn't work, lower your LLC to High LLC and increase your Offset voltage to compensate for the increase in Vdroop. This will make your idle voltage higher and potentially solve the problem. This is discussed extensively in the threads of munaim1, FYI.
post #4 of 14
Thread Starter 
Bump!
post #5 of 14
Quote:
Originally Posted by Smykster View Post

Start with PLL at around 1.7v, people say 1.1v for VCCIO, although I've noticed no difference. Adjust vcore as needed. Also a note on LLC, I've found ultra high LLC to lead to 124 BSOD. Here's my thinking on why:
"I noticed I was BSODing when gaming and when Idle/browsing the internet, NOT when stress testing. With this observation, I came to the conclusion that my system was BSODing when the multiplier was rasied to MAX but the processor wasn't quite at full load. I don't think the mobo was supplying enough power to the proc under light to moderate load scenarios. When LLC is on ultra, the core voltage increases with processor load, being at the highest when the system is at full load. When LLC is not on, or on a lower setting, the processor pumps the most volts into the processor before full load. So when you find that you're proc is stable @ 1.35v full load and LLC is on ultra, during light loading it will still be running at the overclocked speed but with less volts going into it causing instability. LLC being lower gives to a cushion to fall on in a sense, for example, if your proc is stable @ 1.35v full load(accounting for vdroop) and LLC is off, before it hits full load the volts are going to be around 1.37 or so. Therefore the unstable area when the processor is at a moderate load disappears."

I Thought that Ultra High LLC setting feeds more Idle volts? My BIOS Is set to 1.365 and when i idle i get around 1.376, when i ran Only High LLC my Vdroop was way worse. So higher LLC is better and more cushioning right? But your saying to lower it in theory to prevent errors? Less cushion = less errors? Dont u mean more LLC is better
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(18 items)
 
   
CPUMotherboardGraphicsRAM
Intel i5-2500k @ 4.6 GHZ ASUS P8Z77-V PRO XFX AMD 6970 2GB CORSAIR VENGENCE DDR3 16 GB 1600mhz 9 9 9 24-2R 
Hard DriveHard DriveHard DriveOptical Drive
Western Digital 7200 rpm 500 gb (Storage)  CRUCIAL M4 64 GB SSD SATA III (Boot Drive) External 1 TB Western Digital HDD ASUS DVD-RW 
CoolingOSMonitorKeyboard
ZALMAN CNPS9900MAX Windows 7 Ultimate 64 Bit Acer 1920 x 1080 23 inch Razer BlackWidow 2013 Ultimate Mechanical keybo... 
PowerCaseMouseMouse Pad
CORSAIR 650 Watt ANTEC 900 Razer NAGA Razer Kabuto 
AudioOther
Logitech G930 and some speakers. USB Drives Oh and a surge protector to prevent ... 
CPUMotherboardGraphicsRAM
Intel Celeron Dual Core G530 @ 2423 MHZ ASUS P8Z68-V PRO EVGA 550 Ti G.SKILL Ripjaws Series 4GB DDR3 1600 MHZ 9-9-9-24 
Hard DriveOptical DriveCoolingOS
250 GB 7200 RPM Western Digital LG DVD RW You don't wanna know. Win 7 64 
Monitor
19 inch dell 1280 x 1024  
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Gaming Rig
(18 items)
 
   
CPUMotherboardGraphicsRAM
Intel i5-2500k @ 4.6 GHZ ASUS P8Z77-V PRO XFX AMD 6970 2GB CORSAIR VENGENCE DDR3 16 GB 1600mhz 9 9 9 24-2R 
Hard DriveHard DriveHard DriveOptical Drive
Western Digital 7200 rpm 500 gb (Storage)  CRUCIAL M4 64 GB SSD SATA III (Boot Drive) External 1 TB Western Digital HDD ASUS DVD-RW 
CoolingOSMonitorKeyboard
ZALMAN CNPS9900MAX Windows 7 Ultimate 64 Bit Acer 1920 x 1080 23 inch Razer BlackWidow 2013 Ultimate Mechanical keybo... 
PowerCaseMouseMouse Pad
CORSAIR 650 Watt ANTEC 900 Razer NAGA Razer Kabuto 
AudioOther
Logitech G930 and some speakers. USB Drives Oh and a surge protector to prevent ... 
CPUMotherboardGraphicsRAM
Intel Celeron Dual Core G530 @ 2423 MHZ ASUS P8Z68-V PRO EVGA 550 Ti G.SKILL Ripjaws Series 4GB DDR3 1600 MHZ 9-9-9-24 
Hard DriveOptical DriveCoolingOS
250 GB 7200 RPM Western Digital LG DVD RW You don't wanna know. Win 7 64 
Monitor
19 inch dell 1280 x 1024  
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post #6 of 14
Thread Starter 
Quote:
Originally Posted by pent View Post

I Thought that Ultra High LLC setting feeds more Idle volts? My BIOS Is set to 1.365 and when i idle i get around 1.376, when i ran Only High LLC my Vdroop was way worse. So higher LLC is better and more cushioning right? But your saying to lower it in theory to prevent errors? Less cushion = less errors? Dont u mean more LLC is better

We are talking about Offset voltage here. You're experiencing that because you're using Manual. When using Offset, the Vcore drops to around 1.000V at Idle and with UH LLC you use less Offset voltage so you have less idle Vcore.
post #7 of 14
Quote:
Originally Posted by kevindd992002 View Post

We are talking about Offset voltage here. You're experiencing that because you're using Manual. When using Offset, the Vcore drops to around 1.000V at Idle and with UH LLC you use less Offset voltage so you have less idle Vcore.

Ahhh thanks for clearing that up, gotcha.
Gaming Rig
(18 items)
 
   
CPUMotherboardGraphicsRAM
Intel i5-2500k @ 4.6 GHZ ASUS P8Z77-V PRO XFX AMD 6970 2GB CORSAIR VENGENCE DDR3 16 GB 1600mhz 9 9 9 24-2R 
Hard DriveHard DriveHard DriveOptical Drive
Western Digital 7200 rpm 500 gb (Storage)  CRUCIAL M4 64 GB SSD SATA III (Boot Drive) External 1 TB Western Digital HDD ASUS DVD-RW 
CoolingOSMonitorKeyboard
ZALMAN CNPS9900MAX Windows 7 Ultimate 64 Bit Acer 1920 x 1080 23 inch Razer BlackWidow 2013 Ultimate Mechanical keybo... 
PowerCaseMouseMouse Pad
CORSAIR 650 Watt ANTEC 900 Razer NAGA Razer Kabuto 
AudioOther
Logitech G930 and some speakers. USB Drives Oh and a surge protector to prevent ... 
CPUMotherboardGraphicsRAM
Intel Celeron Dual Core G530 @ 2423 MHZ ASUS P8Z68-V PRO EVGA 550 Ti G.SKILL Ripjaws Series 4GB DDR3 1600 MHZ 9-9-9-24 
Hard DriveOptical DriveCoolingOS
250 GB 7200 RPM Western Digital LG DVD RW You don't wanna know. Win 7 64 
Monitor
19 inch dell 1280 x 1024  
  hide details  
Reply
Gaming Rig
(18 items)
 
   
CPUMotherboardGraphicsRAM
Intel i5-2500k @ 4.6 GHZ ASUS P8Z77-V PRO XFX AMD 6970 2GB CORSAIR VENGENCE DDR3 16 GB 1600mhz 9 9 9 24-2R 
Hard DriveHard DriveHard DriveOptical Drive
Western Digital 7200 rpm 500 gb (Storage)  CRUCIAL M4 64 GB SSD SATA III (Boot Drive) External 1 TB Western Digital HDD ASUS DVD-RW 
CoolingOSMonitorKeyboard
ZALMAN CNPS9900MAX Windows 7 Ultimate 64 Bit Acer 1920 x 1080 23 inch Razer BlackWidow 2013 Ultimate Mechanical keybo... 
PowerCaseMouseMouse Pad
CORSAIR 650 Watt ANTEC 900 Razer NAGA Razer Kabuto 
AudioOther
Logitech G930 and some speakers. USB Drives Oh and a surge protector to prevent ... 
CPUMotherboardGraphicsRAM
Intel Celeron Dual Core G530 @ 2423 MHZ ASUS P8Z68-V PRO EVGA 550 Ti G.SKILL Ripjaws Series 4GB DDR3 1600 MHZ 9-9-9-24 
Hard DriveOptical DriveCoolingOS
250 GB 7200 RPM Western Digital LG DVD RW You don't wanna know. Win 7 64 
Monitor
19 inch dell 1280 x 1024  
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post #8 of 14
Thread Starter 
Quote:
Originally Posted by pent View Post

Ahhh thanks for clearing that up, gotcha.

No problem mate smile.gif

Now if someone could help me in achieving my OP question here frown.gif
post #9 of 14
Quote:
1.) Where is the VCCSA Voltage Option? Why can't I seem to find it in my settings?

VCCSA - System voltage, should be where the VCCIO is located. If it is still unavailable I would get in touch with Asus, possibly a BIOS reversion will fix that.

Quote:
2.) At what multiplier should I set my system WHEN looking for the sweet spots for VCCIO and PLL voltages?

Any multiplier would do, but I would say multi 45.

Quote:
3.) Where do I start in optimizing VCCIO, PLL, and Vcore voltages?

Not sure what you mean, but all overclocking should be done from the BIOS.

Quote:
4.) Does anyone tweak their PCH voltage as well?

I don't personally touch the PCH or the VCCSA.


Quote:
I hope you can guide me though this. I have read a lot of your guides including everything about x124 BSODs but I think I really need your help on this. Can you direct me on what to do?

Thoroughly read this: http://www.overclock.net/t/1120291/solving-fixing-bsod-124-on-sandybridge-read-op-first
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it looks alive
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Sandy Transformed
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Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
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post #10 of 14
Thread Starter 
Quote:
Originally Posted by munaim1 View Post

Quote:
1.) Where is the VCCSA Voltage Option? Why can't I seem to find it in my settings?
VCCSA - System voltage, should be where the VCCIO is located. If it is still unavailable I would get in touch with Asus, possibly a BIOS reversion will fix that.
Quote:
2.) At what multiplier should I set my system WHEN looking for the sweet spots for VCCIO and PLL voltages?
Any multiplier would do, but I would say multi 45.
Quote:
3.) Where do I start in optimizing VCCIO, PLL, and Vcore voltages?
Not sure what you mean, but all overclocking should be done from the BIOS.
Quote:
4.) Does anyone tweak their PCH voltage as well?
I don't personally touch the PCH or the VCCSA.
Quote:
I hope you can guide me though this. I have read a lot of your guides including everything about x124 BSODs but I think I really need your help on this. Can you direct me on what to do?
Thoroughly read this: http://www.overclock.net/t/1120291/solving-fixing-bsod-124-on-sandybridge-read-op-first

Thanks.

What I meant was "WHEN do I start in optimizing VCCIO and PLL voltages? Only when I get x124 BSODs?

If I can boot my system at 50x multiplier with PLLV Overvoltage disabled then I don't need it at all?
Edited by kevindd992002 - 1/21/12 at 6:56pm
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