Massive VDROOOOP? wtF?

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gc86

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So I just got a P5K-E the other day to go with my Q6600 and I noticed in CPU-Z that my vcore was 1.23 so im thinking to myself wth? dont the Q6600's come stock at 1.35. So I venture into the BIOS and manually set 1.35 and the result is the same, 1.23 in the hardware monitor and 1.23 in CPU-Z. What gives? I turned on that feature in the bios that is supposed to regulate voltage to no avail. Im about to do the pencil mod in a second. In the meantime anyone else have this problem?

I have one hunch though, the 8-pin power connector on the mb has 1 side blocked off to accept the older style 4-in connectors, which my PSU does have, a 4-pin. Could this be it?
 
I'm considering buying a P5K-E soon, so please keep us notified if you find anything else out.

EDIT: I hate asking for helping without offering some myself. Have you checked for in-depth reviews of that power supply? I used to have an Ultra X-Connect 500W, and it would give me some pretty bad vdroops from time to time even though I had a fairly nice motherboard.

EDIT AGAIN: I couldn't find any professional reviews for you, but I did manage to find your PSU on Newegg. One or two people complained about voltages being off, while a few more just complained about overall quality. Take it with a grain of salt...
 
I had a ultra 500 on my p5b-plus and noticed that I would have up to .04 vdroop from the bios to mobo reading thru cpuz. Setting my bios to 1.365 yeilded a 1.325 thru cpuz. I had that running a processor(dual core) for a few months till I recieved my Q6600 and changed most of the parts. 100% folding for the [H]orde 24/7.
 
The quad is going to exagerate Vdroop, compared to dual core. Outside of that, make sure to turn on the voltage damping feature on your mobo. It should help you out some. If it doesnt, you can do a simple potentiometer mod.

The P5K-E, and every other lower end P35 mobo is only going to have 4 phase PWM. Despite that, these low cost mobos have been able to hit outstanding over clocks, all things considered. But then, even in the $300+ high end, I'm not sure if anyone made a P35 with 8 phase.

Either way, you've got a Q6600 at 3.6. That's pretty good on air. If I get 3.6 stable out of my DC, I'll be pretty happy, no matter what the vdroop looks like.
 
In the latest bios the voltage dampener setting has been replaced with something called Line drive or w/e not sure what the name is but it is enabled and doesnt make a difference.
 
gc86 said:
In the latest bios the voltage dampener setting has been replaced with something called Line drive or w/e not sure what the name is but it is enabled and doesnt make a difference.
Click to expand...

That's interesting to hear. I've heard others give positive results from that setting. Maybe it isn't quite as functional on the P5K-E as it would be on a premium or something. Who knows? Perhaps I should have gone with the Blood Iron for less money then.....haha. I've got a P5K-E wifi on the way. I guess I'll find out. (Knock on wood)

Either way, p35 and vdroop go hand in hand from what I've read. That's why you'll see a lot of guys on XS running with the vdroop mod on their mobo.
 
C1E & EIST enabled?
It could be those scaling back when full CPU power not necessarry.
 
Can you return the board for a P5E X38? A simple pencil mod makes that thing have ZERO Vdroop. I don't think the P5K series has such a mod.
 
You need to check the side of the cpu box for the Vid of your cpu. They are set differently at the factory during manufacturing.
http://www.hardforum.com/showthread.php?t=1212904

Btw that is Vdrop and you just compensate with more Vcore in the bios.

Vdroop wouid be the voltage difference between Vcore measured under load and Vcore at idle.

Lets recap, you have, according to your sig, a Q6600 runing at 3.6GHz AND at what amounts to stock voltage and do not complain about stability or crashing , but because a voltage reading in a couple of software programs seems low you want to take a pencil and apply random bits of conductive material to a resistor in the cpu voltage regulation circuitry ?

Hell Yea! Sounds like a good plan, have fun:
http://www.xtremesystems.org/forums/showthread.php?t=145142&page=2
 
Dang, now I'm having second, third, even fourth thoughts about this motherboard. Can anyone confirm whether or not his problems are out of the ordinary for an overclocked C2Q on that mobo? Or suggest a better one near that price range?
 
A Shiny Demon said:
Dang, now I'm having second, third, even fourth thoughts about this motherboard. Can anyone confirm whether or not his problems are out of the ordinary for an overclocked C2Q on that mobo? Or suggest a better one near that price range?
Click to expand...

I think that's pretty normal for every P35 board without a Vdroop mod with a C2Q. I get about a .1V droop with a G33 Gigabyte board (pissed me off for a while, but I just deal with it now).
 
All 680i and P35's have bad vdroop. The quads are about double of a dual core, as one would expect. If you do a pencil mod, and hope to have that board for awhile, I'll throw caution to the wind.

Vdroop is supposed to happen per Intels specifications. The more you co, the worse your Vdroop will become. It's implemented to save your cpu.
 
I've already done the P5K vdroop pencil mod.. I still get vdroop, maybe I didn't shade in the resistor enough? its pretty dark with lead.
 
Its a good idea to establish where the problem lies first.
The CPU might be getting the correct voltage but the motherboard may be reporting it wrong, this does happen.
Many times I have found the voltage and temp readings to be off quite a bit.

Use a multimeter to find if the onboard VRegs output is close to the voltage you expect.
Check idle and load voltages.
Dont take a multimeters result as absolute gospel but it should have a better tolerance than the motherboard so will be approximately right (unless you are using a calibrated meter in which case you can absolutely trust the voltage reading).

If the voltage is measured low, its most likely to be a motherboard problem.
The 12V supply is converted to the lower voltage needed for the CPU, by the motherboard.
 
.12V droop seems excessive though?
& they say that an unmodded IP35 Pro is bad at about 0.08V with a Quad ... :rolleyes:
 
Until the actual voltage is verified, you dont know that there is any voltage drop.
 
*hugs his Corsair HX520 and P5K-Dlx WiFi AP* :)


Almost zero v-droop with this pair.@ 3.3Ghz with vcrore set to 1.35 I get 1.320 in cpuz,and 1.314 with a multi meter ! This mobo kicks ass.
 
Hey, Just wanted to revive this topic, cause I found something out with my P5K.

I just started clocking on mine today after an extensive HSF and CPU lapping job last night. Man, stability was nowhere to be found! What a bummer.

My vdroop was at least .15 volts at idle. Did the pencil mod mod.........vdroop is still .11 volts.

After some reading, I found some people complaining about later bioses. So I downloaded the 0602 bios for this board (originally came with 0703). Boom, no more vdroop. 1.35 v BIOS = 1.36v in windows.

With that all cleared up, my oc-abilty has improved massively. 3280mhz at default voltage and still going.
 
Also, my 956P board had vdroop too ... Just compensate in bios for system stability. :p
 
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