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AMD Zosma 960T/1600T/1605T CPU Club - Page 81

post #801 of 2790
Quote:
Originally Posted by ozzy983 View Post

You actually answered your own question and the reasoning behind it.
The key word there is: at stock. When you increase the CPU speed and voltage, you are lowering the thermal wall considerably. In fact, pushing 1.55V through the processor, the wall is around 45 (core temp, not socket).
I can't get 4.4 mathematically stable (extended linpack or prime runs), but if I stick the PC in front of the window (it's like 40 outside), the core "temp" drops to about 30C under load, guess what, it passes, in fact, I can overclock it to 4.6ghz and that because the new problem area. Point is: the 960t is extremely sensitive to heat.
With 4 modules, yes, increasing the NB voltage can help stabilize an overclock but YMMV. The CPUNB will need quite a bit to run over 2800 and even more with 6 cores enabled, assuming all 6 can even run a 2800+ to begin with. This also adds even more heat to the processor since the IMC is located on the processor.

Stock vCore, I ought to have elucidated. I'm at 3.6GHz at 1.3vCore and I get about 52C-55C max temps over a 10 hour prime. I've gone up to 70C stable but I never keep settings that run that hot for extended periods of time, so I am also surprised to hear about a 45C thermal wall. I think this is another case of "your chip" not "all chips". I have read a lot about this chip loving the cold, though, and seeing 5GHz+ on sub-zero cooling...but we all know cooler is better. It's not really a "thermal wall" if you can run stable at 45C, change a bunch of settings, and then run unstable at 45C. The problem is elsewhere but bringing the temp down helps. Calling it a thermal wall is misleading, imo. In any case, I'm doing pretty well so far at about 40C while gaming intensively with all my OC settings, including 2800 NB but I did have to up the CPU-NB voltage quite a bit.
post #802 of 2790
Quote:
Originally Posted by Kylezo View Post

Stock vCore, I ought to have elucidated. I'm at 3.6GHz at 1.3vCore and I get about 52C-55C max temps over a 10 hour prime. I've gone up to 70C stable but I never keep settings that run that hot for extended periods of time, so I am also surprised to hear about a 45C thermal wall. I think this is another case of "your chip" not "all chips". I have read a lot about this chip loving the cold, though, and seeing 5GHz+ on sub-zero cooling...but we all know cooler is better. It's not really a "thermal wall" if you can run stable at 45C, change a bunch of settings, and then run unstable at 45C. The problem is elsewhere but bringing the temp down helps. Calling it a thermal wall is misleading, imo. In any case, I'm doing pretty well so far at about 40C while gaming intensively with all my OC settings, including 2800 NB but I did have to up the CPU-NB voltage quite a bit.

I can understand your point of view, and I agree that using the terms "thermal wall" or "thermal ceiling" can be misleading. The safeguards are all taken at stock settings, so the ceiling will change with each new voltage and speed.

While some chips maybe more sensitive than others, there are far too many variables in play to make an accurate assessment. Quality of VRMs and motherboard manufacture quality are two that come to mind.

For my system, 45C @ 1.55V is about the cut off on air. Though, I might be able to lower it by 5C by replacing the dark knight.
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post #803 of 2790
That totally makes sense, temp and instability of course go hand in hand...I find some temps @ certain clocks are fine where the same temps at other clocks are not and vice versa, etc. And that's why it's definitely best to relegate most blanket statements to "my chip" as opposed to "all 960Ts" with all those variables, haha.
post #804 of 2790
Quote:
Originally Posted by rdr09 View Post

how many thubans did you use with the same prolem?
i think you meant . . . my thuban was flaky at 55.
try unlocking without changing any values including vcore. like you said - one step at a time. anyway, my rams do not like going past 1700.

It means I read a lot of stories. Ofc, in my case, it doesn't mean everyone will have trouble after 55c, just like your success doesn't mean noone will have problems above 55c biggrin.gif And this is based on, "all chips are different"
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CPUMotherboardGraphicsRAM
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SHSS37A120G WD5000AAKX-001CA0 WD20EARX WD20EZRZ 
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post #805 of 2790
Quote:
Originally Posted by Catscratch View Post

It means I read a lot of stories. Ofc, in my case, it doesn't mean everyone will have trouble after 55c, just like your success doesn't mean noone will have problems above 55c biggrin.gif And this is based on, "all chips are different"

it is difficult when there are a lot of variables and no standards to go by. members are counting on the clubs to put out reliable information like ours.
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post #806 of 2790
Quote:
Originally Posted by Xaxinian View Post

So then, would you recommend systematically reducing my vcore voltage until I cannot pass stress tests or it crashes? To find how little heat I can get away with. Also Did anyone see anything with my settings that they didnt like or where it could use improvement?
AMD 960t BE 6 Unlocked
Gigabyte 970a-UD3 Mobo
Gskill Ripjaw DDR3-1600 4gbx2 9-9-9-24 stock
Coolermaster Hyper 212 plus PSU
Raidmax RS 530SS heatsink
Radeon XFX 6770 GPU
CPU: x20 4000MHz
CPU NB: x14 2800MHz
Core Performance Boost: Disabled
CPU Host Clock Control: Manual
CPU Frequency: 200
HT Link Frequecy: 2400MHz
Memory Clock: 8.0 1600 mhz 9-9-9-24
Voltages
CPU NB vid control 1.3v
Cpu voltage control 1.425

your settings look good to me. how is your Raidmax holding (readings using HW monitor)? and did you say your vcore unlocked at 4GHz is 1.47v or 1.42V? i got mine stable at 1.42v.
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post #807 of 2790
User Name: Vedas
CPU: 960 T Zosma
24/7 OC: X4 4000 @ 1.325 v
Max OC: X4 4500 @ 1.5 v
Unlockable: X6
post #808 of 2790
Quote:
Originally Posted by Vedas View Post

User Name: Vedas
CPU: 960 T Zosma
24/7 OC: X4 4000 @ 1.325 v
Max OC: X4 4500 @ 1.5 v
Unlockable: X6

wow. what kind of cooler are you using?

Welcome.
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post #809 of 2790
Having a hard time getting my rig builder to show. I created it but it won't show at my bottom of the post. It's a Arctic Freezer 13 Pro.

Edit - Figured it out
post #810 of 2790
i just earned $35 . . .

http://www.amazon.com/AMD-Phenom-Processor-Black-Socket/dp/B0056D5AMY
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