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How do I achieve the overclock I want? i5 3570k

post #1 of 21
Thread Starter 
Hello guys! So I've been playing with my overclock recently, and I'm having a hell of time getting exactly what I want. So to start, the overclock I want:
Load
- 4.5 Ghz
- Voltage 1.2

Idle
-1.6 Ghz (standard)
- Voltage < 1

So, this is my experience with offset voltage: for the last few weeks, I was running 4.5 ghz at 1.2vcore, under the impression that the voltage was bringing itself down when idle. I recently discovered that because I had set a manual vcore, the voltage was constantly 1.2v regardless of frequency. Obviously this is unacceptable. But the problem with offset is my computer sets the load voltage for 4.5 ghz ridiculously high: a maximum of 1.34 volts! I tried a -.07 offset, but the processor still idles at voltage over 1 volt. So how do I set a offset relative to a load voltage that I set? Is what I want even possible? So in order to reach low idle voltages, must I run crazy high load voltages? Am I doing something wrong?

Man, after 3 months you would think I'd know all there is about overclocking mad.gif
post #2 of 21
I believe what you want is Speedstep enabled.
 
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Asus 1025C-MU17
(8 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 3570K - 4.4GHz 1.2V Asrock Z77E-ITX EVGA GTX 950 SSC Samsung 30nm 2x4GB - 2000 9-10-10-21 
Hard DriveHard DriveHard DriveOptical Drive
Hitachi Deskstar 320GB Samsung 840 Pro 256GB Hitachi Travelstar 320GB Panasonic UJ8C5 
CoolingCoolingOSMonitor
Corsair H60 2x Cougar V12HPB PWM Windows 7 Pro 64-bit Samsung 2033 
KeyboardCaseMouse
Quickfire TK MX Red NCASE M1 No. 635 Razer Deathadder Chroma 
CPUGraphicsRAMHard Drive
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post #3 of 21
Thread Starter 
SpeedStep is enabled, according to my BIOS. I recently did a BIOS update, but i dont think that should effect speedstep. My frequency is throttling, its just my voltage is static.
post #4 of 21
C-states?

I thought Speedstep automatically throttled voltage even when manually set? Could be motherboard specific, but that's my experience, anyway, from my [former] sig rig to every other PC I've built.

See if it will throttle voltage when you set it to auto?
 
Asus 1025C-MU17
(8 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 3570K - 4.4GHz 1.2V Asrock Z77E-ITX EVGA GTX 950 SSC Samsung 30nm 2x4GB - 2000 9-10-10-21 
Hard DriveHard DriveHard DriveOptical Drive
Hitachi Deskstar 320GB Samsung 840 Pro 256GB Hitachi Travelstar 320GB Panasonic UJ8C5 
CoolingCoolingOSMonitor
Corsair H60 2x Cougar V12HPB PWM Windows 7 Pro 64-bit Samsung 2033 
KeyboardCaseMouse
Quickfire TK MX Red NCASE M1 No. 635 Razer Deathadder Chroma 
CPUGraphicsRAMHard Drive
Intel Atom N2600 1.6GHz Powertel GMA SGX545 2GB Corsair 1066MHz Samsung 830 64GB 
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Asus 1025C-MU17
(8 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 3570K - 4.4GHz 1.2V Asrock Z77E-ITX EVGA GTX 950 SSC Samsung 30nm 2x4GB - 2000 9-10-10-21 
Hard DriveHard DriveHard DriveOptical Drive
Hitachi Deskstar 320GB Samsung 840 Pro 256GB Hitachi Travelstar 320GB Panasonic UJ8C5 
CoolingCoolingOSMonitor
Corsair H60 2x Cougar V12HPB PWM Windows 7 Pro 64-bit Samsung 2033 
KeyboardCaseMouse
Quickfire TK MX Red NCASE M1 No. 635 Razer Deathadder Chroma 
CPUGraphicsRAMHard Drive
Intel Atom N2600 1.6GHz Powertel GMA SGX545 2GB Corsair 1066MHz Samsung 830 64GB 
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post #5 of 21
What do you have set for LLC? With offset mode you want a low setting for LLC and a higher offset value.

You might also need to disable C3 and C6 when using offset (if you get idle lockups), but you'll want EIST and C1E to stay enabled (sounds like they already are).

All offset does is add the offset you specify and the voltage the CPU is requesting, so if the CPU wants 1.3V at load and you know it only needs 1.25V, then you'd set a -0.05V offset. You'll probably have to play with it a little to find the right value - put something in, then see what that gives you under load, then adjust it to correct to what you want.
Edited by Forceman - 11/21/12 at 4:40pm
post #6 of 21
Thread Starter 
Whenever I try to boot with an offset, even -0.010, windows refuses to boot. It looped about 4 times before I reset the voltage to 1.2. I'm going to apply some of your tips. So first run a stress test on auto vcore, find out max voltage necessary, then proceed to apply offset?
post #7 of 21
Thread Starter 
I have LLC at 50% (High), better tune that down. Should i set it to the lowest?
post #8 of 21
Quote:
Originally Posted by EXDetonator View Post

Whenever I try to boot with an offset, even -0.010, windows refuses to boot. It looped about 4 times before I reset the voltage to 1.2. I'm going to apply some of your tips. So first run a stress test on auto vcore, find out max voltage necessary, then proceed to apply offset?

There are two ways to do it (assuming you already know the voltage you are looking for by testing with a manual voltage). You can keep the manual voltage in and the, while testing with Prime/IBT, check RealTemp for the VID at load. Then just figure out the offset needed to make that number match what your manual voltage is. So if your manual voltage is 1.2 and the VID is 1.25, then you need a -0.05 offset.

The other way is to pick a reasonable offset value (say +0.005) and then boot up and test under load to see what the actual delivered voltage is. Then adjust as above. So is a +0.005 offset gives you 1.225V and you want 1.2V, you just change the offset to -0.02 instead. I prefer this method because it takes into account LLC and Vdroop, but they both work.

And I'd recommend medium or lower for LLC. Doesn't have to be all the way at the lowest. Every board has a different range and method of specifying it (I wish they all just did low, medium, high, instead of % and numbers).
post #9 of 21
Thread Starter 
Okay, I set it to auto, and my max voltage when prime95 blending on 4.5ghz is 1.38 volts. I have confirmed via manual voltage my cpu can run 4.5 on 1.2 volts: now what? Reduce offset to -.12?
post #10 of 21
Try offset voltage of +0.005 and a turbo voltage of +0.027. Should be just about what you are looking for. LLC at second highest setting
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