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phenom II 1090T overclock help? - Page 2

post #11 of 29
Quote:
Originally Posted by K2493 View Post
Yes, Its 100% stable and never goes past 40C full load
well only thing i can think of then is you got stuck with a crappy chip, but even then, i don't think any chip would need 1.53v for 3.7ghz.

it could be your motherboard. i see you have the Asus M4A78LT-M. that has a 4+1 phase unheatsinked vrm design. you're oc'ing a 125W chip and at 1.53v, i'm surprised your pc hasn't shut itself down yet. you can read about the importance of a good vrm design here.

i'm thinking maybe your board is not able to push a stable voltage to your cpu because of its 4+1 phase design and 4pin cpu connector.

someone might have some other ideas.
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post #12 of 29
Thread Starter 
so then theres nothing I can do?
Edited by K2493 - 4/8/11 at 3:26pm
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post #13 of 29
Quote:
Originally Posted by K2493 View Post
I'm thinking it's the mobo, the voltages shouldn't fluctuate that much when manually set, should it?
when going from idle to load, yes, it's normal for voltage to drop slightly. it's called vdroop. using load line calibration can help. there should be a setting in your bios. it will help stabilize your voltages under load, but all it really does is push more voltage to your cpu under load to equate for vdroop (i believe). all boards handle this differently though. personally, i don't like the load line calibration on my board because it bumps the voltage up a little too much. i'd rather have higher idle voltages.
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post #14 of 29
Thread Starter 
Quote:
Originally Posted by fazio93 View Post
when going from idle to load, yes, it's normal for voltage to drop slightly. it's called vdroop. using load line calibration can help. there should be a setting in your bios. it will help stabilize your voltages under load, but all it really does is push more voltage to your cpu under load to equate for vdroop (i believe). all boards handle this differently though. personally, i don't like the load line calibration on my board because it bumps the voltage up a little too much. i'd rather have higher idle voltages.
Thanks, I'll see what I can do with that, but then again I still have the problem with it dropping the clocks when it hits 46C
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post #15 of 29
Thread Starter 
Wow lol, Put Load line calibration to 0% and it works. Im stress testing 4ghz @1.425V until i hit 46C, which it then underclocks to 1600mhz(temp jumps down to 36C) then repeats the process. Id like to get past 46C but I don't understand whats stopping it. Ive disabled everything like CnQ, C1E, and turbo core
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post #16 of 29
that's very weird that it would start to throttle at that same temp. every time. a quick "1090t 46c" google turned up this page. the guy says:

"I just set it to it's default settings for now but whenever I OC it to 4.0GHz (no matter what voltage) it always drops the Multiplier from x20 to x4 when I run Prime... It's always at a certain temperature like 46C-50C""

similar to your problem.

try googling '1090t keeps throttling'. first result was this. some guy said

"after some further OC'ing and testing I think its due to the overheating over the voltage regulation circutry, or perhaps something close to this I'm not sure.

my chip @ 4ghz (200x20) and 1.5v throttled exactly the same as yours, backed it to 3800mhz and 1.45, same deal, but 3800mhz @ 1.425 and I'm golden, it'll prime indefinately at that speed without dropping."

just search around. someone ought to have a solution
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post #17 of 29
Quote:
Originally Posted by K2493 View Post
Yes, Its 100% stable and never goes past 40C full load
darn it, your full load temp is lower then my idle temp. jealousy bestows me.
mine is 43c on 3.7 at 30c ambient temp
post #18 of 29
Thread Starter 
Ok, thanks a lot, I can play around with it more now that its not crashing every time, Ill see what i can do(when I have time)
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post #19 of 29
I'd be worried with those speeds on a board with 4+1 phase VRM. I had my 1090T at 3.9 on a 4+1 board till I learned about VRM's. I dropped that OC back a bit right away as I was having mobo heat issues. No errors or anything, just too hot for my tastes, better safe than sorry.
So if you can upgrade anything in the near future, that mobo would high on the list.
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post #20 of 29
Thread Starter 
Quote:
Originally Posted by Fuell View Post
I'd be worried with those speeds on a board with 4+1 phase VRM. I had my 1090T at 3.9 on a 4+1 board till I learned about VRM's. I dropped that OC back a bit right away as I was having mobo heat issues. No errors or anything, just too hot for my tastes, better safe than sorry.
So if you can upgrade anything in the near future, that mobo would high on the list.
Mobo temp is 36C @3.7ghz. What is the max temperature to be safe?
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