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phenom II 1090T overclock help? - Page 3

post #21 of 29
Mobo temp =/= VRM temp. Sometimes there is no way to tell by software.

You'll be fine on that board as if the VRMs overheat the board's protection features should kick in and you won't be victim of catastrophic failure, but you may not be able to overclock properly. This is a 125W+ x6 TDP-heavy processor on an unheatsinked 4+1 phase - the VRMs likely would overheat often even at stock because the tower cooler you use doesn't allow the VRMs to get any cooling whatsoever.... as a result the OCP protection would kick in, probably way too often, and you won't be able to experience the OC'ed performance or stability test properly because it keeps downclocking or shuts down mid-test. You should add some form of VRM cooling (MOSFET cooling) before proceeding, or things may not work properly.

Also, +1? No, -1 to both fazio and BWG, as turning off power saving features is completely unnecessary because more often than not they will work correctly, never get in your way, and give your CPU some additional lifespan. Go green. At higher multipliers CnQ may simply stop working though.
In addition, that wouldn't be the problem anyway because 1. if you actually read, he does have them disabled and 2. this:
Quote:
as soon as the temp hits 46C, the clock drops down to X8 and stays there until the temps go back down, then goes back up. I don't think 46C is that hot and I'm wondering why it's doing this.
This is indeed OCP protection and your VRMs are getting too hot to handle the CPU at load. You need to add MOSFET cooling sir, or you'll never be able to stability test or work properly because it's going to keep downclocking like that. You may also want to move the voltage from auto to manual to lower the voltage (1.5V for 3.75Ghz indeed is too much) & power consumption to ease the load on the VRMs, but you should still add MOSFET cooling first or even then you wouldn't be able to test the lower voltages properly. Note that the OCP protection may not be corresponding to that "46C" temp, the VRM temp may be internally monitored and invisible to you via software, and hitting 46C CPU temp is not why it's downclocking and just coincidence.

tl;dr (too long, didn't read), your VRMs are overheating (fully expected as this is an unheatsinked/uncooled 4+1 pushing a 125W+ overclocked x6); downclocking the processor is part of the protections from VRM overheat/failure. You need to add MOSFET cooling. That is your problem. You may also want to move the voltage from auto to manual to lower the voltage & power consumption to ease the load on the VRMs, but you should still add MOSFET cooling first or even then you wouldn't be able to properly stability test.

If you don't know what is a VRM or MOSFET or why exactly this is a problem for you, read the article "About VRM's & MOSFETs" in my sig. It's highly underlooked so don't be surprised that you don't know about it, a lot of people don't.


MOSFET cooling I can recommend:
Enzotech MOS-C1
Enzotech MOS-C10
Or whatever you can find around your house that'd work i.e. spare aluminum heatsinks that you can cut up into smaller ones
A fan (in tandem with the heatsinks, of course) would really help keep the VRM temps down.
Edited by xd_1771 - 4/9/11 at 5:54pm
post #22 of 29
Quote:
Originally Posted by xd_1771 View Post
Also, +1? No, -1 to both fazio and BWG, as turning off power saving features is completely unnecessary because more often than not they will work correctly, never get in your way, and give your CPU some additional lifespan. Go green. At higher multipliers CnQ may simply stop working .
That's exactly why I told him to turn it off. I believe around 3.8GHz CnQ actually turns itself or something. Power saving features such as c1e and CnQ are known to cause stability problems once overclocking begins. Most of the time OC'ed systems can run fine @ load, but then become unstable once these power saving features start dropping clocks and voltages. For others, they work just fine w/ overclocking. Just depends on your system.
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post #23 of 29
Alright then. The problem did not in the end turn out to be CnQ however, it's a VRM overheating (OCP) issue. Unless he gets the VRMs cooled properly it's going to happen on every stability test, so he's never going to be able to stability test or run anything properly.
post #24 of 29
Quote:
Originally Posted by xd_1771 View Post
Alright then. The problem did not in the end turn out to be CnQ however, it's a VRM overheating (OCP) issue.
Well, it had to be tested some way.

So how does ASUS's OCP work then? I though it just shuts down your system when VRM current/temps become too high. It also can throttle your system?
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post #25 of 29
Thread Starter 
Ok, I'll get the MOSFET cooling, but is it worth it? Or would it be better to get a new mobo altogether? Don't have much money so I'd rather keep the board if there's no other issues.
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post #26 of 29
Quote:
Originally Posted by fazio93 View Post
Well, it had to be tested some way.

So how does ASUS's OCP work then? I though it just shuts down your system when VRM current/temps become too high. It also can throttle your system?
It throttles your system by reducing CPU speed for a few seconds which greatly lowers the load on the CPU. Less load = less voltage the VRM's have to regulate. During those seconds it gives itself time to cool. At least that's how they have worked in my experience.
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post #27 of 29
Quote:
Originally Posted by iinversion View Post
It throttles your system by reducing CPU speed for a few seconds which greatly lowers the load on the CPU. Less load = less voltage the VRM's have to regulate. During those seconds it gives itself time to cool. At least that's how they have worked in my experience.
Well yea, I know how the CPU can throttle itself when temps get too high. Just didn't know VRMs can throttle themselves also (thus throttling the CPU). Good to know.
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post #28 of 29
Two ways that OCP works: shutdown during overload, and CPU throttle during overheat. ASUS boards tend to do the latter. VRMs themselves can't throttle, the OCP protection measures VRM temp & condition and throttles the CPU to reduce power load (and therefore VRM load & temperature)

OP you at least need some MOSFET cooling on there pronto. Active preferably as it is an x6 and 4+1.
A new mobo may be a better investment with AM3+ compatible boards already out from numerous manufacturers
post #29 of 29
Alright, thanks for clearing that up.
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