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[Official] MSI GTX 680 Lightning Owners Club - Page 71

post #701 of 7827
Quote:
Originally Posted by xlur8 View Post

Been benching mine all night here best i can get so far is 1354 on the core and +700 on memory no artifacting

Congrats, thats a nice card man. thumb.gif
post #702 of 7827
Quote:
Originally Posted by xoleras View Post

I have to stress again you people have to use manual fan MORE THAN LIKELY if you're using a heavy overclock.
Apparently some people are new to overclocking here, a few years ago it was accepted that if you OC a GPU you have to use manual fan. This has not changed, yet some users are not aware of this. Regardless of your core temp, your VRM temp is stressed without high manual fan settings. As an example, I can OC in SLI to 1352 stable yet it requires 70% manual fan or greater. If I use auto fan it is not stable, if I use manual fan it is stable for 10 hours in heaven stress testing. In single card, I can get one one to 1382 with 75% manual fan - verified and tested with 10 hours of heaven stress testing. Yet with auto fan, I CANNOT OC IT past 1302. Understand that regardless of core temp, VRM temp is not listed and is much better with manual fan, it does not have the heatpipes that the core does.
I don't know what shifted in the mindset of users, I think a lot of people are new to OC'ing GPUs and expect more for less. Use manual fan. You can't OC reliably most of the time with auto fan, period. There are a few exceptions to this but my experience with OC'ing the GTX 480, 580, 680, 7970, and 6970 all provided higher clockspeeds with manual fan with no exceptions. I'm sure someone here will say "but I can do it with auto fan" that is the exception not the norm. VRM temps suck with auto fan and that definitely affects OC stability. Don't use auto fan and expect ridiculous clockspeeds.


This is great advice, the VRM's will suffer tremendously if they are not properly cooled. Auto fan is horrible for high overclocks.
post #703 of 7827
Quote:
Originally Posted by psyside View Post

GPu-Z false reading, last night during gaming max vrm temp shown where 200c rolleyes.gif

Obviously 200'C is incorrect on the VRM temp reading, but in general, it's right. Mine goes from 33'C up to 50'C while stressing.

Here is another example of gpuz giving a bad reading that I don't take literally:



Notice my my gpu core voltage in gpuz on the right(VDDC)?
    
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post #704 of 7827
I edited my post, can you tell me what you think about it? thanks.
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post #705 of 7827
Mine is watercooled, that's why mine looks nice temp wise.
    
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post #706 of 7827
Ah ok, thanks bud! but listen what happend and i'm seriously worried.

I got my card 3 days, and with auto fan speed which is 20% rpm i had only 1c over ambient temp 2 days ago.....

Now, with fan on 35/40% i got 35c on idle! with fan@ auto it was 41c......and i cant get my card to be 1c over ambient again which is 29c or eve 2c higher now no matter what, its 35c as minimum i wonder what happened?

I'm perfectly aware that ambient temps ain't matter much but this is like 12c difference.....what gives? and also almost all of the GTX680 DCII owners have stated that their cards are never go over 1/2c over ambient at idle...
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post #707 of 7827
I don't want to play the little police here tongue.gif
But I just want to gently remember you guys, that this is the MSI Lightning Owners Club thread.
People will mostly comme there seeking for discutions about their msi product so...
There is more apropriate threads for DC2 owners and you will find more apropriate answers there as well
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post #708 of 7827
Quote:
Originally Posted by Xnerdz View Post

I don't want to play the little police here tongue.gif
But I just want to gently remember you guys, that this is the MSI Lightning Owners Club thread.
People will mostly comme there seeking for discutions about their msi product so...
There is more apropriate threads for DC2 owners and you will find more apropriate answers there as well

No problem, im out. Enjoy your cards guys.
post #709 of 7827
Quote:
Originally Posted by Xnerdz View Post

I don't want to play the little police here tongue.gif
But I just want to gently remember you guys, that this is the MSI Lightning Owners Club thread.
People will mostly comme there seeking for discutions about their msi product so...
There is more apropriate threads for DC2 owners and you will find more apropriate answers there as well

Yes sorry, but anywyay i fixed my issue! it was the prefer maximum performance in global settings of Nvdia drivers keep the card at constant 1000+mhz on core biggrin.gif

So happy now, that my temps are back to normal! i just use different profiles for games in which i turn off adaptive performance, and use prefer maximum settings, but global is adaptive thumb.gif
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post #710 of 7827
Quote:
Originally Posted by EM2J View Post

wow +80 more on the core just for manual fan? Sure, i understood that the vrm temps matter a lot when it comes to oc'ing, but that is a HUGE difference, hardly believable actually. I've always used auto fan, of course I made the fan curve very aggressive but if setting it manually at a very high fixed rpm makes that much of a difference, i'll be trying this out for SURE later on today when my 2 lightnings come from amazon.
edit

What I meant was I get +50 more with manual fan in SLI...Anyway, preliminary to this discussion is that I must add that my stress testing is quite extensive, I will run crysis 2 maxed or heaven DX11 looped for hours. Without manual fan with SLI (keep in mind the top card in SLI will always have higher temps) I will eventually get artifacts after some time in, sometimes 30 minutes or 45 minutes. With manual fan this does not happen. I'm honestly quite surprised people are using auto fan because a couple years ago it was accepted that to OC a GPU you MUST use manual fan. I'm shocked to be honest that people aren't doing this.

I remember my 7970s would lock at 1025mhz with auto fan yet with manual fan I could get 1150 easily stress tested. Reference boards are more picky about fan settings and overclocks, you have a little more leeway with aftermarket boards but auto fan does cause heat buildup on the VRM (Since it does not have heatpipes connected to it) Not everyone will get drastically better results with manual fan, but in general it does help a lot. Some people may not get more leeway with manual fan (manual fan helps more in SLI) but it has helped me a lot over the years.
Edited by xoleras - 7/19/12 at 8:54am
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