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3570k voltage changed after BIOS update

post #1 of 5
Thread Starter 
So I'm going to be getting a watercooling loop in the near future, and wanted to make sure my BIOS was updated in case I wanted to do extra overclocking with the new cooling. I updated to the newest BIOS for my motherboard (which is in my sig) and, when in the UEFI, accidentally hit the OC tuner, or automatic overclocking software from ASUS. It completely reset my settings, and my profile from the overclock I did last year was somehow overwritten.

I thought, whatever, I remember most of the numbers/settings, I'll just reset. My old overclock was at 4.2ghz, with vcore -offset, running during prime95 1.168-1.177v. My max temps were 70C during a 12 hour prime95 test.

HOWEVER, I figured I would bump it up to 4.3ghz, and make the offset a little less, to account for the slightly higher.

Short story: I found that when I set the vcore to offset/automatic, the vcore was going at 1.376v max during prime95. My old offset for 4.2ghz had been -0.065 in the BIOS, meaning it had been running at 1.243 without the offset. This means that for 100mhz, my board was jumping .133v! I thought this was extreme.

So i set it back to 4.2ghz, with offset set to auto, and it was running at 1.284v, with temps maxing at 76 after two minutes. This is much higher than what my original OC was.

I guess I can fiddle with the voltages/speeds until I find something within my temp comfort range, but why are the stock voltages suddenly different? Can a bios update really do that? I'm afraid this means my CPU will be running hotter even at the same speeds as my original overclock, as when I set the vcore to "manual" at 1.200, a couple background apps crashed during prime95, and the temps reached 72 within 15minutes. I'm just surprised, is all, and would like to know if there's anything that can be done.

By the way, my PLL setting is "high", like I had set it last year when doing my original overclock.
post #2 of 5
Please don’t “fiddle” with your bios settings. Everything you need to know about ocing your chip on an Asus mobo will be found in the first post of this thread:
http://www.overclock.net/t/1291703/ivy-bridge-overclocking-guide-asus-motherboards

Take your time and read through it, opening up each section. At this point you don’t really need to know what all the settings do, so don’t worry about that. Just copy all the settings in the guide, except for your ram timings/voltage/speed which are specific to your sticks.

With a non delidded Ivy you should have no trouble doing 4.3 or 4.4. There is a huge variety in chips so there are Ivy that can do 4.5 at under 1.15v and others that need over 1.35v for it. Only way to know is to test it.

Whenever you flash bios you will lose all your settings. You should save your bios profile and export it to a usb drive. Then if you flash that bios again you can load your saved profile. However, if you switch to a new bios version, as you did, you will lose your settings and your saved profiles. So most of us take F12 screenshots of the bios pages with a usb drive plugged in so we can look at those on another device when we have to reenter all the settings.

Any questions you have about the oc guide can be asked in that thread and someone will try to help.
Ivy 5.0
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CPUMotherboardGraphicsRAM
i7-3770k 5.0 24/7 Maximus V Formula EVGA GTX 690 G.Skill Trident X 2400 (2x8gb) 
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Samsung 840 Pro 512GB Pioneer BD-RW Swiftech H220 Windows 7 Ultimate 64 bit 
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Ivy 5.0
(14 items)
 
Ivy 4.8
(15 items)
 
 
CPUMotherboardGraphicsRAM
i7-3770k 5.0 24/7 Maximus V Formula EVGA GTX 690 G.Skill Trident X 2400 (2x8gb) 
Hard DriveOptical DriveCoolingOS
Samsung 840 Pro 512GB Pioneer BD-RW Swiftech H220 Windows 7 Ultimate 64 bit 
MonitorKeyboardPowerCase
2 x NEC 30" Logitech G15 Corsair AX1200 NZXT Switch 810 
MouseAudio
Logitech G9x Logitech G51 
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post #3 of 5
Thread Starter 
I read that guide when I first overclocked my CPU last year, and yes, last year I was told to "fiddle" with my voltage settings (not random BIOS settings as it seems you thought I meant) to find my sweet spot for voltage/speed/temps at stable conditions, so please don't speak down to me and act as if I have no clue what I'm doing. You didn't answer my question as to why the voltages necessary would change when it's the same chip, but as it's been a few days, and by changing speeds and voltages, I've gotten it mostly under control.
post #4 of 5
My apologies, but you clearly misinterpreted my post. You would now be only the second person on all of OCN whom I will now ignore. I was quite honestly trying to help you, and took the time to write an informative post.

You can’t compare what vCore is needed for a given multiplier unless every BIOS setting has been optimized and the oc tested properly long term, as to whether a BIOS update has changed that required vCore.

Feel free to take the advice of all the others here that tried to help in your thread.
Ivy 5.0
(14 items)
 
Ivy 4.8
(15 items)
 
 
CPUMotherboardGraphicsRAM
i7-3770k 5.0 24/7 Maximus V Formula EVGA GTX 690 G.Skill Trident X 2400 (2x8gb) 
Hard DriveOptical DriveCoolingOS
Samsung 840 Pro 512GB Pioneer BD-RW Swiftech H220 Windows 7 Ultimate 64 bit 
MonitorKeyboardPowerCase
2 x NEC 30" Logitech G15 Corsair AX1200 NZXT Switch 810 
MouseAudio
Logitech G9x Logitech G51 
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Ivy 5.0
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Ivy 4.8
(15 items)
 
 
CPUMotherboardGraphicsRAM
i7-3770k 5.0 24/7 Maximus V Formula EVGA GTX 690 G.Skill Trident X 2400 (2x8gb) 
Hard DriveOptical DriveCoolingOS
Samsung 840 Pro 512GB Pioneer BD-RW Swiftech H220 Windows 7 Ultimate 64 bit 
MonitorKeyboardPowerCase
2 x NEC 30" Logitech G15 Corsair AX1200 NZXT Switch 810 
MouseAudio
Logitech G9x Logitech G51 
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post #5 of 5
Using offsets basicly effects the VID. The bios flash most likely thinks the CPU needs more Vcore for the frequency, so it says hey lets give it more VID, however since your using hte same offset, it won't be as low of a vcore as before. Try to get the same vcore as before and see if its stable
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