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PCH Voltage safe?

post #1 of 8
Thread Starter 
Hey all.

I was reading an article on Toms (link) about overclocking i5's and came across and interesting find that I've never thought to look at before.

They set the PCH Voltage to 1.9 in most of their tests and achieved stability. Now, I've read on a few websites that I shouldn't have to mess with this and most of them say if you do need to change it, it should only be around 1.1V or so. On the other hand, the guys at Toms must know what they're doing, so what gives?

Now, I've been having problems with my motherboard (D4>FF and 6F error codes). I've searched the eVGA forums to try and find a solution but it seems nobody knows what causes it. Whenever the error popped up, I had to reset the CMOS and change my boot configuration and all of my overclock settings again. It took me 2-3 minutes to actually boot my PC.

When I saw that they'd increased the PCH voltage, I figured I may as well give it a shot to try and stop the error codes. I increased it to 1.9V, just as they did, and bam, everything seems to be working fine.

Now, could it have been this that was stopping me from booting? I understand it's the Southbridge voltage on my P55, but is 1.9V excessive? I mean, it seems like a high number, but I am ignorant as to what voltage is safe for the Southbridge.

I am not sure what temperature sensor it is (SpeedFan can't label them), but the hottest temperature in my system right now (besides my GPU) is 38C. It's not the CPU as it's labelled it as 'Core 0' and is currently at 33C. CoreTemp shows that none of the cores are 38C. I have a feeling this is the Southbridge however I am uncertain.

I read that most people have to up theirs to 1.1V in some cases, but 1.9V?! It's certainly not a typo, so what gives?

I'm looking for someone who might know what voltages are safe for the PCH and if it is indeed this that could have solved my problems. Many thanks in advance.
Edited by jNSK - 1/1/11 at 4:43pm
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post #2 of 8
Thread Starter 
Does anyone know anything about this at all?
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post #3 of 8
Thread Starter 
Bump for an answer.
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post #4 of 8
1.9 will most likely kill it in no time you wont need anymore than 1.4V
post #5 of 8
Thread Starter 
I've put it to 1.2V, I'll see if it's still fixing the problem. Maybe it wasn't even the PCH to start with, I don't know..
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post #6 of 8
I'm pretty sure they are referring to the PLL voltage, which at default is 1.8v. PCH is the Platform Controller Hub, and at default is usually 1.050v ASAIK.
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by R00ST3R;11874910 
I'm pretty sure they are referring to the PLL voltage, which at default is 1.8v. PCH is the Platform Controller Hub, and at default is usually 1.050v ASAIK.

Well, even if it is, that PLL voltage is still insanely high. It just doesn't make sense.
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post #8 of 8
1.9v PLL is not that high.
Black Dynamite
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Black Dynamite
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Hard DriveOptical DriveOSMonitor
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