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Ideas wanted: reducing my OC temps, 955BE

post #1 of 39
Thread Starter 
Hey guys, I managed to find a spot at 330x13 where my 955BE is 20hrs Prime stable with 3.91GHz.

I'm still working on exploring other combinations but I need ideas on how to drop these temps.

Throwaways:
Water - don't want to do this yet. I'm sure I can get more out of this on air.
Bigger/faster/louder fans on the D14 - don't want ugly/loud fans.



Capture.jpg



Going to push for more after I tidy the voltages up a little and try to drop this temp !! 65 is the ABSOLUTE LIMIT of where I am comfortable to push it, although I've heard of people going closer to 70 with these without failing... if anyone has any ideas how i might drop this that'd be awesome.

BIOS settings for this:
  • 300MHz x 13
  • Vcore offset +0.065625V (=1.462V)
  • DRAM 1600MHz 1.65V
  • CPU/NB 2700MHz, voltage offset +0.16875V (=1.277V)
  • HT Link 2100MHz, 1.30V
  • NB 1.15V
  • CPU and CPU/NB LLCs both FULL

(voltages read from BIOS)

Thermal paste used is Noctua's own stuff.


edit: damn, needs time/date showing to prove it's been running for 20 hours now tongue.gif .. next screenshot will have that. I cut this one down to half screen to prevent auto resizing by photobucket - any way to get a clear 1920x1080 show uploaded??





Also, are there any databases I should/could add this to with my settings that'll maybe help some people get an idea of what can work on these CPUs?


Please tell me if the screenshot should have anything else in it as well.


I need to drop these temps though, I'm currently staring down the barrel of 66degC on all cores with 4.06GHz, 301x13.5 @ 1.468V... and it doesn't like less Vcore very much (BSODs with 0x124). Have been running at 4.06 since last night though with no issues in gaming etc. Borderlands 2 doesn't even crack 60degrees on the CPU. GPU is another matter. tongue.gif
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post #2 of 39
Unfortunately, that's not safe, 62c is the highest you want to go on the core temp for these chips (I believe degradation beings around there if kept there for awhile, which it looks like you have). You hear of some people taking it over this temp but not failing because thermal shutdown doesn't occur until the 80s I believe, but that doesn't mean it won't do any harm. http://www.overclock.net/t/1134229/amd-cpus-max-temps

That is strangely very hot for just a 3.9ghz oc especially on an nhd14. Even with a hyper 212+ before, I would get temps ~low to mid 50s at 4ghz 1.5v. How is your thermal paste?

Also, I'm curious as to why you chose the very high bus speed + low multiplier route, instead of the only/mostly multiplier route. Not sure if that has to do with the temps, but it could.
Edited by auraofjason - 10/2/12 at 8:25pm
post #3 of 39
Thread Starter 
Quote:
Originally Posted by auraofjason View Post

Unfortunately, that's not safe, 62c is the highest you want to go on the core temp for these chips (I believe degradation beings around there if kept there for awhile, which it looks like you have). You hear of some people taking it over this temp but not failing because thermal shutdown doesn't occur until the 80s I believe, but that doesn't mean it won't do any harm. http://www.overclock.net/t/1134229/amd-cpus-max-temps
Thanks, I've seen the 62deg limit posted everywhere before but I didn't realise it could do damage.... Maybe I'll tone it down a bit. Although heavy gaming doesn't even see close to 60deg, only Prime.
Quote:
Originally Posted by auraofjason View Post

That is strangely very hot for just a 3.9ghz oc especially on an nhd14. Even with a hyper 212+ before, I would get temps ~low to mid 50s at 4ghz 1.5v. How is your thermal paste?
Thermal paste is Noctua's stuff that came with the NH-D14; apparently it's pretty good. It may still be curing (?) because I only applied fresh stuff last weekend. There's definitely not too much on there.
Quote:
Originally Posted by auraofjason View Post

Also, I'm curious as to why you chose the very high bus speed + low multiplier route, instead of the only/mostly multiplier route. Not sure if that has to do with the temps, but it could.
This is just something I have never tried before. I believe sometimes a higher bus speed has a positive impact on the overall performance of the system when compared to a multi-only overclock... (correct me if I'm wrong). I also want to keep the multiplier below x19 to keep CnQ functional. I'll have a play at lower bus speeds and higher multi, plenty of room for exploration and testing!! I'll keep track of results in 3dmark11 at each stage and see if I find any interesting trends.
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post #4 of 39
Quote:
Originally Posted by savage1987 View Post

Thanks, I've seen the 62deg limit posted everywhere before but I didn't realise it could do damage.... Maybe I'll tone it down a bit. Although heavy gaming doesn't even see close to 60deg, only Prime.
Thermal paste is Noctua's stuff that came with the NH-D14; apparently it's pretty good. It may still be curing (?) because I only applied fresh stuff last weekend. There's definitely not too much on there.
This is just something I have never tried before. I believe sometimes a higher bus speed has a positive impact on the overall performance of the system when compared to a multi-only overclock... (correct me if I'm wrong). I also want to keep the multiplier below x19 to keep CnQ functional. I'll have a play at lower bus speeds and higher multi, plenty of room for exploration and testing!! I'll keep track of results in 3dmark11 at each stage and see if I find any interesting trends.

Noctua paste is good, give it a little time to settle and spread (cure), what have you.

62.5C is AMD's recommendation for TCase, not core temperatures, and judging by the look of your screenshot, I'd that that TMPIN0 is probably your "CPU" or "Socket" temperature. No, the socket doesn't have a sensor, that temperature is actually the Tcase estimation, and since yours is under 62.5, you're fine. On the limit, but fine. The cores (TCTL) are rated much, much higher than 62C for 24/7 usage. Yours is a peak, not 24/7.

Bus speed has no real affect on system performance because your CPUNB is also unlocked, although it can make your overclock more stable if you find a strap that your chip likes to run in. 300*13.5 for example. Just make sure that HTT doesn't go beyond 10% away from stock, in either direction.
    
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post #5 of 39
Thread Starter 
Oh wow, good to know. Maybe I should watch temps in Speccy instead, that reads lower (probably same as TMPIN0 actually). Or I'll just watch TMPIN0 max in Hardware Monitor tongue.gif

Some good information there, I feel I could learn a lot from you. I can't actually remember what my HTT was stock, will have to check that. Advice I have been given tells me to keep CPU/NB 2600-2800 with 1.4V max, HT link around 2000 (with no performance drop up to 2350 but that may require more voltage)

Everything else has just been trial and error really smile.gif

Thanks for the info, looks like I don't have to turn it down from my 4.06 after all smile.gif
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post #6 of 39
Quote:
Originally Posted by savage1987 View Post

Oh wow, good to know. Maybe I should watch temps in Speccy instead, that reads lower (probably same as TMPIN0 actually). Or I'll just watch TMPIN0 max in Hardware Monitor tongue.gif
Some good information there, I feel I could learn a lot from you. I can't actually remember what my HTT was stock, will have to check that. Advice I have been given tells me to keep CPU/NB 2600-2800 with 1.4V max, HT link around 2000 (with no performance drop up to 2350 but that may require more voltage)
Everything else has just been trial and error really smile.gif
Thanks for the info, looks like I don't have to turn it down from my 4.06 after all smile.gif

Nice overclock on that chip to be honest, 2100Mhz HTT(eff.) wouldn't hurt anything, stock is 2000. That said, I run mine at 2100 as well, with a 300 strap. Is 1.3v the default voltage for your HTT? On my chip it's about 1.20v (1.15-1.25), but this board does sag quite a bit.

Take the NB as high as you can manage as long as you keep the vDDNB under 1.4, yeah. 2600-2800 is a real "stability point" for OCing the cores, and it adds a ton of performance. Actually some of the highest performance per MHz in the system, at the cost of also being some of the highest TDP per MHz density when overclocked.

I prefer watching both temperatures myself. You'll commonly see me post that core temperatures are useless, but someone (damric) actually put it in better words. They are useful, if you know how to read them. I've done a lot of scanning through AMD datasheets over the dilemma of socket vs. cores (or in the AMD sense TCase vs. TCTL).
    
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post #7 of 39
Thread Starter 
Positive comments, good to hear I'm at least in the right ballpark smile.gif

Resetting everything to stock I checked the voltages in BIOS..
CPU 1.349V
CPU/NB 1.105V
CPU VDDA (whatever that is tongue.gif) 2.500V
HT 1.210V
NB 1.111V
SB 1.111V


I got excited about the CPU/NB performance:MHz comment, until you mentioned temps. Maybe I shouldn't try to push that further after all.

I've just turned it up another half multi to 4.2GHz and it's booted to Windows fine (typing this from it), don't think it'll be stable without more Vcore, but we'll soon find out smile.gif
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post #8 of 39
CPU VDDA (VDDA, VPLL) is the voltage that controls the internal clock multiplication logic. Some believe that increasing this value can add additional stability to high overclocks, and others think that it is snake oil. Personally, I just leave it alone as Phenom II on 800/900 series boards has depreciated its value. It was however more talked about back in the original Phenom days.
Quote:
HT 1.210V
NB 1.111V
SB 1.111V

You can probably safely ignore these voltages. I only increased mine due to the vDroop on this board so that they don't sag below stock values.
Quote:
I've just turned it up another half multi to 4.2GHz and it's booted to Windows fine (typing this from it), don't think it'll be stable without more Vcore, but we'll soon find out

cheers.gif

If you find yourself unstable, you can also try increasing the NB1.8 (VDD1.8, VCC1.8, or NB 1.80) voltage. It helps when used with higher reference clocks, but be mindful that it may add a slight bit of heat to the northbridge on the board itself, not the CPUNB. 1.85-1.90 is a good place to start for 300-350 reference. You can also try increasing the tRFC on your RAM up to 160ns. This can have profound effects on bus stability at higher speeds smile.gif
    
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post #9 of 39
Thread Starter 
Good to know - I just kept pushing Vcore to get it stable. I got almost 15min of Prime95 without error at 4.215GHz but that TMPIN0 hit 63 so I shut it off and turned it back to 4.05GHz for now. Really I'm tempted to leave it with that 4.2 and just stability test through normal use and gaming, in the knowledge that it will never get Prime hot doing anything else.... not right now though.

If increasing Vcore stabilised 4.2, is there a chance I may be able to drop that Vcore a little and substitute in that 1.85-1.9V on the NB? To attempt to move some heat from the CPU to the NB (CH IV F NBs are pretty well covered with heatspreaders anyway...) or is my logic massively flawed?

I really really want 4.2 stable on air for 24/7 use tongue.gif I'm so close!!! (At 1.52V and 63degrees TMPIN0 though.)


I have no idea what you just said about the RAM tongue.gif

Would that maybe let me get it to run at its rated 2000MHz?? It doesn't even make it to Windows at 2000 now.. "Overclocking failed" message in the "DOS" prompt..
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post #10 of 39
Quote:
Originally Posted by mezmenir View Post

I prefer watching both temperatures myself. You'll commonly see me post that core temperatures are useless, but someone (damric) actually put it in better words. They are useful, if you know how to read them. I've done a lot of scanning through AMD datasheets over the dilemma of socket vs. cores (or in the AMD sense TCase vs. TCTL).
Core temperatures are actually very important, what are you smoking? rolleyes.gif
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