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i5 2500k Not Idling to 1.6GHz

post #1 of 20
Thread Starter 
I am having an issue regarding downclocking. When I used AI Suite to automatically overclock my system, it would always downclock to 1.6 at idle. However, I got rid of AI Suite and did a manual OC using various guides from across the web.

I've overclocked stable to a 4.3, but I bumped it down to 4.2 just because... and in actuality I'll probably drop it down to an even 4.0 since I doubt there is much difference between 4.2 and 4.0 (correct me if I'm wrong). The main issue I have is that, according to CPU Z, my computer is always running at 4.2GHz. There are some SPLIT seconds where it drops down to 1.6, but then it just shoots back up to 4.2. Even off cold boot, and running CPU Z only, it's idling at what appears to be 4.2.

Now from what I've read, the settings that effect the downclocking at idle are the C1E and Speedstep? I have both enabled, so I'm not really sure why it's not downclocking at idle.

Here's my build:
Intel i5 2500k
ASUS P8P67 Deluxe REV 3
8 GB (2x4GB) G.Skill Ripjaws (9-9-9-24 1600)
Cooler Master Hyper 212 Plus
PNY GTX 560
Corsair HX850
Patriot Torqx 64GB (for boot drive)
1 TB WD MyBook External HDD
Windows 7 64-bit

Here are my BIOS settings:

Version 2103
Ai Overclock Tuner Manual
BCLK 100
Turbo Ratio 42
Internal PLL Overvoltage Auto (I had it at enabled before, however after reading many guides which seem to contradict each other I left it on auto)
Memory Frequency DDR3-1600MHz
EPU Power Saving Mode Disabled
OC Tuner OK (If I even click cancel when selecting this option it just turns off my computer..)

>>CPU Power Management<<
CPU Ratio Auto (I'm not sure if this needs to be changed?)
EIST Enabled
Turbo Mode Enabled
Rest of the settings Auto

LLC Auto
VRM Frequency Manual to 350
Phase Control Extreme
Duty Control T.Probe
CPU Current Capability 100%
CPU Spread Spectrum Disabled

For the CPU Voltages, I had it running on offset before with a +0.030, however I've just manually configured it to 1.215v and I'm going to run a stress test after I write this. Before when I had it on offset mode, it would be running at around 1.35v which seems a little high for a 4.2 OC? However from what I understand anything between 1.2-1.4v is OK?

>>CPU Configuration<<
CPU Ratio Auto (Again, I'm not sure if this needs to be changed?)
Intel Adaptive Thermal Monitor Enabled
Active Processor Cores All
Limit CPUID Max Disabled
Execute Disable Bit Enabled
Intel Virtualization Tech Disabled
EIST Enabled
Turbo Mode Enabled
CPU C1E Enabled
CPU C3/C6 Report Disabled

I believe that is it unless I left something out... this is the first PC I've built in my entire life and I bought all the parts off Newegg (except for the External HDD).

There is also this random issue sometimes where sometimes after I change something in the BIOS and hit [Save & Reset], the computer reboots but it hangs at the Windows logo and the only way to remedy this is to reset my computer. This then results in the computer identifying something wrong happened, but instead of the traditional menu for "Boot in Safe Mode" blah blah, it has a different menu that says "Run Recovery" or something along those lines or the other option is "Boot Windows Normally". If I choose to "Run Recovery", it begins to run a program that scans for errors and then asks me if I'd like to do a System Restore. However, if I simply choose to "Boot Windows Normally", it seems to boot fine...

Anyways, if anybody could provide some insight regarding why my system isn't downclocking at idle, I'd gladly appreciate it. Thank you for your time, I know this was a lengthy post!
Black Dynamite
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Intel Core i5-2500K @4.3GHz ASUS P8P67 DELUXE REV 3 PNY GeForce GTX 560 G.Skill Ripjaws X Series 8GB 
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Black Dynamite
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post #2 of 20
Make sure your C1/C1E is turned ON *as in not on Auto*

Everything looks good...

1.35 is a little high for 4.2 but that could be contributed to your chip just not being a strong overclocker. Mine takes 1.49v to reach 5.0 other people get 5.0 at 1.35 =/
Edited by OwnedINC - 2/22/12 at 9:33pm
post #3 of 20
Also...

Make sure you're not in "Performance" (or whatever it's called) Power Profile in the Control Panel.

Make sure you're set to balanced.
post #4 of 20
Thread Starter 
C1E is enabled as well as Speedstep. I literally JUST went into the BIOS and checked, all settings are as stated in my original post. I just rebooted and ran CPU Z right away and its reading 4200 MHz... and as I'm typing this post it dips to 1600 MHz for less than half a second before returning to 4200 MHz.
Black Dynamite
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Intel Core i5-2500K @4.3GHz ASUS P8P67 DELUXE REV 3 PNY GeForce GTX 560 G.Skill Ripjaws X Series 8GB 
Hard DriveHard DriveCoolingOS
Patriot Torqx SSD 64GB WD My Book Essential 1TB Cooler Master Hyper 212 Plus Windows 7 Home Premium OEM 64-bit 
MonitorPowerCase
SyncMaster 2232BW 22" Corsair Professional Series HX850 Rosewill Challenger Black Gaming ATX Mid Tower 
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Black Dynamite
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Intel Core i5-2500K @4.3GHz ASUS P8P67 DELUXE REV 3 PNY GeForce GTX 560 G.Skill Ripjaws X Series 8GB 
Hard DriveHard DriveCoolingOS
Patriot Torqx SSD 64GB WD My Book Essential 1TB Cooler Master Hyper 212 Plus Windows 7 Home Premium OEM 64-bit 
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post #5 of 20
Well keep in mind the chip only considers itself idle at sub-10% usage.
post #6 of 20
Thread Starter 
Power Options in Windows is set to Balanced. I had it on High Performance before but I've read numerous forums saying it needs to be on Balanced so I changed it.
Quote:
Well keep in mind the chip only considers itself idle at sub-10% usage.

I see. However, the thing I don't understand is why off a cold boot, it's not idling at 1.6? Unless my (very minimal) amount of startup programs are causing it to load over 10%? The only things that run on startup is my NOD32 and Zone Alarm. There is honestly nothing else on this computer, I just built it about 2 weeks ago and the only thing I really have installed on here is Skyrim and Saints Row The Third.
Black Dynamite
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Intel Core i5-2500K @4.3GHz ASUS P8P67 DELUXE REV 3 PNY GeForce GTX 560 G.Skill Ripjaws X Series 8GB 
Hard DriveHard DriveCoolingOS
Patriot Torqx SSD 64GB WD My Book Essential 1TB Cooler Master Hyper 212 Plus Windows 7 Home Premium OEM 64-bit 
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Black Dynamite
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Intel Core i5-2500K @4.3GHz ASUS P8P67 DELUXE REV 3 PNY GeForce GTX 560 G.Skill Ripjaws X Series 8GB 
Hard DriveHard DriveCoolingOS
Patriot Torqx SSD 64GB WD My Book Essential 1TB Cooler Master Hyper 212 Plus Windows 7 Home Premium OEM 64-bit 
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post #7 of 20
If you go and manually set the power options on balanced, you can change it to idle at any % you want.

Just keep in mind if you set it to high you can cause instability due to heavy cpu usage when the voltage jumps switching from idle to load speeds.
Edited by OwnedINC - 2/22/12 at 10:01pm
post #8 of 20
Thread Starter 
Quote:
Originally Posted by OwnedINC View Post

If you go and manually set the power options on balanced, you can change it to idle at any % you want.

I see that option now that I went into the Power Options, I changed it to 1%. The most interesting thing about this whole issue though is that my friend who has almost the exact same build as me (instead has a GTX 580, a water cooling system instead of air, and his MOBO isn't B3) is able to have his tower idle at 1.6. I was just talking to him on Facebook and we were comparing our BIOS settings and for the most part its the same except he has his tower overclocked to 4.5. So I'm really confused how two almost identical systems, his is able to idle at 1.6 but mine is still reading 4.2.
Black Dynamite
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Intel Core i5-2500K @4.3GHz ASUS P8P67 DELUXE REV 3 PNY GeForce GTX 560 G.Skill Ripjaws X Series 8GB 
Hard DriveHard DriveCoolingOS
Patriot Torqx SSD 64GB WD My Book Essential 1TB Cooler Master Hyper 212 Plus Windows 7 Home Premium OEM 64-bit 
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SyncMaster 2232BW 22" Corsair Professional Series HX850 Rosewill Challenger Black Gaming ATX Mid Tower 
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Black Dynamite
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CPUMotherboardGraphicsRAM
Intel Core i5-2500K @4.3GHz ASUS P8P67 DELUXE REV 3 PNY GeForce GTX 560 G.Skill Ripjaws X Series 8GB 
Hard DriveHard DriveCoolingOS
Patriot Torqx SSD 64GB WD My Book Essential 1TB Cooler Master Hyper 212 Plus Windows 7 Home Premium OEM 64-bit 
MonitorPowerCase
SyncMaster 2232BW 22" Corsair Professional Series HX850 Rosewill Challenger Black Gaming ATX Mid Tower 
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post #9 of 20
CPU-Z was designed for consistent validation purposes.

If you want to see what each thread of your CPU is really doing then give ThrottleStop a try. Modern Intel CPUs have cores and threads rapidly entering and exiting various C States when they are lightly loaded. ThrottleStop uses high performance timers within these CPUs and can very accurately show you what percentage of time your cores are spending in various C States. This is far more important than a MHz number which can be meaningless when a CPU is idle or lightly loaded.

ThrottleStop closely follows the monitoring method recommended by Intel.

ThrottleStop 4.00
http://www.techinferno.com/downloads/

Some of your bios settings might be interfering with your CPU entering the deeper sleep states. If your goal is to minimize power consumption then adjust away and keep an eye on that number in ThrottleStop as well as the percentage of time your CPU package is spending in C3 and hopefully C6.

Here's an interesting comparison.

cpuzs.png
Edited by unclewebb - 2/22/12 at 10:15pm
post #10 of 20
I would just use RealTemp 3.70 it gives you real time clock usage, plus temperatures of course. My cpu-z does clock times super slowly, i would go there the only way i can idle at 1.6 is when my computer is idle for like 5 min.
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Small wonder.
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