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AMD Zosma 960T/1600T/1605T CPU Club - Page 80

post #791 of 2790
Quote:
Originally Posted by Kylezo View Post

Really? Flaky after 55C? Anyone else have this experince? Cuz it hasn't been mine at all. Hell, my 960T approaches 55C at stock settings in Prime95 at some points in a long test. The thermal wall is quite a bit higher than 55C so I'm surprised to hear about performance degradation that early.
I've heard raising the NB voltage can be quite helpful for RAM/core clock OC stability. Is this not the case? My NB wont go about 2800MHz without some voltage increase to both CPU-NB and NB.
Quote:
Originally Posted by rdr09 View Post

that's something new. that's my temp when i game at 4.2GHz as a hex. no flakyness here.

I mentioned "most" not all and "when overclocked". Regular NB voltage sometimes help but it's not a general rule. I had problems around 55c on my 1090t failing prime95 on 1 or 2 cores. However, i needed lotsa voltage for 4ghz, so I had to back down to 3900@1.45c, that was its sweet spot.
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Intel Evilnow
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post #792 of 2790
Well I decided to start from scratch on my OC. Just doing one thing at a time. So I would like to post what I have got it at stable and see if any of you tweakers out there have some fine tune advice for me.

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

Again its stable at 4Ghz and passing OCCT. but I want to open up the other 2 cores (Which I know to be good) and possibly fiddle with memory timings. But any suggestions or critique would be appreciated.
post #793 of 2790
Quote:
Originally Posted by Catscratch View Post

I mentioned "most" not all and "when overclocked". Regular NB voltage sometimes help but it's not a general rule. I had problems around 55c on my 1090t failing prime95 on 1 or 2 cores. However, i needed lotsa voltage for 4ghz, so I had to back down to 3900@1.45c, that was its sweet spot.

how many thubans did you use with the same prolem?

i think you meant . . . my thuban was flaky at 55.
Quote:
Originally Posted by Xaxinian View Post

Well I decided to start from scratch on my OC. Just doing one thing at a time. So I would like to post what I have got it at stable and see if any of you tweakers out there have some fine tune advice for me.
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
Again its stable at 4Ghz and passing OCCT. but I want to open up the other 2 cores (Which I know to be good) and possibly fiddle with memory timings. But any suggestions or critique would be appreciated.

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.
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post #794 of 2790
Ok I did unlock them without changing the voltage, but you reminded me of a question. SOmetimes when testing my vcore jumps up to 1.55. I think I have all the turbo boost, cool and quiet etc turned off. I set my vcore to 1.475. Is this jump normal when stress testing?

Also my temp seems to run higher at 6 cores showing 57c max, is this because it cant accurately gauge my temps with 6 unlocked?
post #795 of 2790
Quote:
Originally Posted by Xaxinian View Post

Ok I did unlock them without changing the voltage, but you reminded me of a question. SOmetimes when testing my vcore jumps up to 1.55. I think I have all the turbo boost, cool and quiet etc turned off. I set my vcore to 1.475. Is this jump normal when stress testing?
Also my temp seems to run higher at 6 cores showing 57c max, is this because it cant accurately gauge my temps with 6 unlocked?

wonderful! the vcore jumping up and down happens with my mobo, too. i read it has to do with vdroop compensating to keep the system stable (not bsod) during load and unload.

the extra cores will really make your temp go higher. it's like a 4 cylinder runs cooler than a 6 cyl requiring a much bigger radiator. at least that is how i see it. other components are working hard as well.

you can try lowering your vcore - yours might do it.

you know what else? try enabling Cool and Quiet and see if stays stable. set Power Savings mode in Windows at Balance. Keeps the system cooler. Revert back if it becomes unstable.

i keep mine at 4GHz as shown in my rig and would stay that way even come summer. thumb.gif
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post #796 of 2790
Add me

User Name: TwiggLe
CPU: 960T
24/7 OC: 4.2ghz
Max OC: 4.2ghz
Unlockable: Yes


Also just got my sabertooth 990fx so will try to get higher with my OC.
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post #797 of 2790
Quote:
Originally Posted by Kylezo View Post

Really? Flaky after 55C? Anyone else have this experince? Cuz it hasn't been mine at all. Hell, my 960T approaches 55C at stock settings in Prime95 at some points in a long test. The thermal wall is quite a bit higher than 55C so I'm surprised to hear about performance degradation that early.

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.
Quote:
I've heard raising the NB voltage can be quite helpful for RAM/core clock OC stability. Is this not the case? My NB wont go about 2800MHz without some voltage increase to both CPU-NB and NB.

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.
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post #798 of 2790
Quote:
Originally Posted by rdr09 View Post

wonderful! the vcore jumping up and down happens with my mobo, too. i read it has to do with vdroop compensating to keep the system stable (not bsod) during load and unload.
the extra cores will really make your temp go higher. it's like a 4 cylinder runs cooler than a 6 cyl requiring a much bigger radiator. at least that is how i see it. other components are working hard as well.
you can try lowering your vcore - yours might do it.
you know what else? try enabling Cool and Quiet and see if stays stable. set Power Savings mode in Windows at Balance. Keeps the system cooler. Revert back if it becomes unstable.
i keep mine at 4GHz as shown in my rig and would stay that way even come summer. thumb.gif

It's kinda weird, but my old mobo the Vcore only increases under load and it's only by .025vs. I see a ton of systems where the fluctuations are fairly significant. It does't have LLC, didn't really exist in its current incarnation when this mobo or chipset were in their prime.

Some motherboards, though, you can tweak LLC (Line Load Calibration) to reduce vdroop considerably; most leave it alone believing the processor is just getting the power it needs; after seeing what AMD considers good voltages (stock 3.0 only requires 1.075Vs, that's .2V overvolt), I'm not surprised it might get a bit carried away.

FYI, vdroops appears to kick in with any voltage higher than 1.
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post #799 of 2790
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
post #800 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.

^^^^ this
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