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1055T stuck at 3.8 GHz ;_; - Page 2

post #11 of 33
nvidia chipset's on amd board's don't like a high FSB. I can guarantee you that it's your board that's holding you back.

Try to bump the "chipset voltage" (or NB voltage (not cpu-nb !) if you can't find chipset voltage) a bump or 2.
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post #12 of 33
Thread Starter 
Quote:
Originally Posted by amd-dude;12753745 
Honestly i don't use prime 95 that much again, it takes to long to get errors out of an overclock. I use LINX, it raises the temps higher than what prime does and it usually gets an error before 1 or 2 hrs

Haha, it survived 43s at 4GHz (1.5/1.4). Passed 20 runs at 3.95GHz (1.4875/1.3875). I'll try for longer now.

During LinX though, my CPU temperature fluctuates a lot (one second it's 42C, the next it's 35C, and the next 26C). Is that safe?
Quote:
Originally Posted by nicksasa;12754012 
nvidia chipset's on amd board's don't like a high FSB. I can guarantee you that it's your board that's holding you back.

Try to bump the "chipset voltage" (or NB voltage (not cpu-nb !) if you can't find chipset voltage) a bump or 2.

It's on Auto so I don't even know what a bump or two is?
Edited by jenesuispasbavard - 3/16/11 at 9:47am
post #13 of 33
I've never really seen Linx jump the temps around like that...i know when it is just starting the cpu and ram usage go all around the place then about 1min in it stabilizes and then puts on the heat....maybe u ran the settings to low...

For the problem size crank it to the max, most likely it will give you an error to for linx to auto set a size, let it do that, and the same goes for the memory, use the maximum.
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post #14 of 33
Quote:
Originally Posted by amd-dude;12754774 
I've never really seen Linx jump the temps around like that...i know when it is just starting the cpu and ram usage go all around the place then about 1min in it stabilizes and then puts on the heat....maybe u ran the settings to low...

For the problem size crank it to the max, most likely it will give you an error to for linx to auto set a size, let it do that, and the same goes for the memory, use the maximum.

Ofcourse LinX will spike, especially if it's on low settings.
Quote:
The nVidia nForce 750a SLI northbridge can be brought up to 1.15V
And doesn't your board work with offsets ? I mean like +0.05V +0.1V etc ?
Edited by nicksasa - 3/16/11 at 10:19am
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post #15 of 33
Thread Starter 
Quote:
Originally Posted by amd-dude;12754774 
I've never really seen Linx jump the temps around like that...i know when it is just starting the cpu and ram usage go all around the place then about 1min in it stabilizes and then puts on the heat....maybe u ran the settings to low...

For the problem size crank it to the max, most likely it will give you an error to for linx to auto set a size, let it do that, and the same goes for the memory, use the maximum.

Ah, if I click the 'All' button next to memory size, it'll automatically set the maximum problem size that fits into my memory (~29700 into 6750MB).
Quote:
Originally Posted by nicksasa;12754836 
And doesn't your board work with offsets ? I mean like +0.05V +0.1V etc ?

No, the NB voltage can either be set to Auto or varied from 1.1-1.4V. But it looks like 'Standard' is 1.1V. I take it that's the default. If I can't get 3.95GHz stable, I'll crank that up, but otherwise I don't have to get to 4GHz except for epeen.


P.S. HOLY DAMN! My power meter shows 360W when just the CPU is running! (The GPU idles at ~30W). The total system power consumption was ~390W when the CPU and GPU were both crunching away at SETI@Home, back when the CPU was at 3.5GHz. Time to settle for 3.9GHz methinks.
Edited by jenesuispasbavard - 3/16/11 at 10:59am
post #16 of 33
Never settle for less than what you want...This is overclock.net biggrin.gif we will find a way. biggrin.gif
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post #17 of 33
Sometimes bumping the SB voltage up a .1V helps with stability on high NB clocks. not sure about with nvidia chipset though... Worth a shot, cant hurt.
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post #18 of 33
Quote:
Originally Posted by nicksasa;12754012 
nvidia chipset's on amd board's don't like a high FSB. I can guarantee you that it's your board that's holding you back.

Try to bump the "chipset voltage" (or NB voltage (not cpu-nb !) if you can't find chipset voltage) a bump or 2.

Off topic: will this impact a 1090t overclock then?
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post #19 of 33
Thread Starter 
I finally have an acceptable power/performance compromise. (Actually I can't really get it stable at a higher frequency even after raising the voltages to 1.5V CPU and 1.4V CPU/NB, but that's ok).

I'm stable at 3808MHz with the following settings:

Base clock: 272MHz
Multiplier: 14
CPU clock: 272x14 = 3808MHz @ 1.4375V
CPU/NB: 2448MHz @ 1.35V
HT Link: 1904MT/s @ Auto (1.2V)
DRAM: 1451MHz @ 1.6V
LinX power: 320W

I'll run a long LinX test tonight.

Turns out 3DMark11's physics test is one of the fastest indicators of instability I've come across. Any clocks/volts that crashed the test also inevitably failed in LinX within 5-10 minutes. And anything stable in LinX for ~1 hour also passed the 3DMark11 physics and combined tests looped for at least 30 minutes.

TIL that increasing CPU/NB voltage is necessary as CPU clocks go up, even if you're keeping the CPU/NB frequency down by decreasing its multiplier.
post #20 of 33
Quote:
Originally Posted by Citra;12755997 
Off topic: will this impact a 1090t overclock then?

It shouldn't.
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