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Overclocked Power saving?

post #1 of 3
Thread Starter 
So i just FINALLY got my i5 750 stable at 4ghz. Finished 24 hours of prime95 this morning with no errors. Now that thats done, i would like my processor to underclock itself when idle to save some power, no use browsing the internet at 4ghz. How do i go about doing this? I tried changing some settings in bios which i thought would allow the cpu to underclock itself but it just BSODs shortly after post. doesnt even get into widnows. Namely I enabled intels speed step tech (allows cpu speed to be controlled by the os) and enabled the C states (forgot what the actual option was called). So what did i do wrong? Or is there another trick or something im missing? Can this even be done or is it too high of an overclock to attempt any power saving?
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INTEL I5 4690K ASUS Z97-AR XFX R9_290X PATRIOT Viper 2133 MHz 8GB 
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Current Machine
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INTEL I5 4690K ASUS Z97-AR XFX R9_290X PATRIOT Viper 2133 MHz 8GB 
Hard DriveHard DriveCoolingOS
Seagate 1TB SSHD PLEXTOR 256GB PCIE M.2 SSD LIQUID Windows 7 
PowerCase
CORSAIR AX 760 CORSAIR AIR 540 
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post #2 of 3
I figured Id do the same thing then someone kindly pointed out to me:

The difference is literally a few pennies an hour (at MOST) and the instabilities that come along with it are not worth it in the long run. I cant find the post right now but the difference from max processor power to underclocked really doesn't make a big difference in your electric bill.
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Intel Overclocker
(12 items)
 
Media PC
(8 items)
 
 
CPUMotherboardGraphicsRAM
Intel i7 4790k Delidded + Lapped ASRock Z97 Extreme4 MSI Twin Frozr GTX 660  Corsair Vengeance Pro 2400mhz DDR3 
Hard DriveHard DriveOptical DriveCooling
OCZ Deneva 2 R series 400GB SSD WD Green 4TB HDD Asus DRW-24B1ST Phanteks PH-TC14PE_RD 
OSPowerCaseMouse
Windows 10 Seasonic 650w M12II Phanteks Enthoo Pro M with Acrylic side Cobra e-blue 
CPUMotherboardRAMHard Drive
intel core 2 quad q8200 Dell studio stock Dell studio Stock Corsair Force 3 SSD 
Hard DriveOptical DriveCoolingOS
External powered Seagate expansion desk Dell studio stock Stock Windows 10 
CPUMotherboardGraphicsRAM
FX-8350 GA-990FXA-UD5 MSI 7870 Hawk Edition Gskill 1600 2x4 GB 
Hard DriveOptical DriveCoolingOS
Corsair Force Series 3 22x Samsung w/ lightscribe dvd/cd burner Noctua NH-D14 Win 7 pro x64 
MonitorPowerCase
Acer x173w Seasonic M12II 650watt Semi-Modular PSU Apevia x-dreamer4 (with side window and red) 
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post #3 of 3
Double check to make sure your C states are all enabled and SpeedStep is enabled.
My 2500k is overclocked only by raising multiplier and it's able to downclock when idle.

Some argue that your CPU shouldn't need to run at full speed all day while you browse the internet. Other's don't mind.
Personally, i like mine to downclock, probably makes near zero impact on the electricity bill anyway, however keeps the CPU running cooler when you're not using it either, would help in the summer to have it this way too.
   
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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 
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