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Old 07-19-08, 02:22 PM   #1
Kaguya
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Default 100% Fan or Do You Want Earplugs With That?

So I've been tooling around with Precision and clocking my 260s upward... they're both Vanilla versions, but I've been able to push the clocks up to that of the EVGA 260 FTW version (666/1107) however while it performed fine in Grid and Vantage with Auto fan speed, in DX10 Call of Juarez eventually I saw what appeared to be 'minor' graphic anomalies.

So I tooled around with the fan and found that if I want to keep at the FTW speed I need 100% fans. But man is that loud!? Especially with two of these suckers going full tilt.

I was able to clock them to 626/1053 which is one step down from the FTW in EVGA's line, which is still good, and leave the fan on auto - but I left a profile with 100% fan for vantage epeening. The difference in actual gaming between those two speeds seems to be very minor.

Anyway, my question: Do most of you running high clocks have to use fairly aggressive fan speeds to maintain them? Also, is there a way to change the auto fan-speed adjust, or is it built into the card's bios?
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Old 07-19-08, 02:32 PM   #2
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Default Re: 100% Fan or Do You Want Earplugs With That?

the FTW edition cards are probably binned to run those clocks much better than standard chips

626 seems kind of low for a max OC, but every card is diffferent.
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Old 07-19-08, 02:36 PM   #3
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Default Re: 100% Fan or Do You Want Earplugs With That?

My card has 100% fan speed 24/7, both overclocked and non overclocked.

It's automatically forced via Rivatuner on every startup.
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Old 07-19-08, 02:38 PM   #4
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Default Re: 100% Fan or Do You Want Earplugs With That?

Quote:
Originally Posted by hemmy View Post
the FTW edition cards are probably binned to run those clocks much better than standard chips

626 seems kind of low for a max OC, but every card is diffferent.
Like I said it's not my max - I'm sure I could get this to run over 700 if I wanted to leave my fan on 100% all the time... I also think it's probably my RAM that's overheating because my reported temp stays in the low 70's at 666 whether the fan is auto or 100%

Is there much reason in pushing the core up but leaving the RAM lower?
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Old 07-19-08, 05:28 PM   #5
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Default Re: 100% Fan or Do You Want Earplugs With That?

my 8800GTS (G92) fan at 100% is louder than the gtx 280 at 100%
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Old 07-19-08, 06:43 PM   #6
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Default Re: 100% Fan or Do You Want Earplugs With That?

I've always ran my GPU's fans at 100%, overclocked or not.

Kaguya, as for raising the Core, but not the RAM clocks, just know that most of your performance gain will be from the Core, not the RAM, so always raise the Core Clocks first, then the RAM when overclocking your GPU(s).
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Old 07-19-08, 07:08 PM   #7
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Default Re: 100% Fan or Do You Want Earplugs With That?

I have yet to get mine over 80 with the fan running on auto. I think the max it has gone was around 60%
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Old 07-19-08, 08:07 PM   #8
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Default Re: 100% Fan or Do You Want Earplugs With That?

Quote:
Originally Posted by bacon12 View Post
I have yet to get mine over 80 with the fan running on auto. I think the max it has gone was around 60%
Yeah, with my fan on auto I don't think it's even reached 50%... I think 46% was the top. But I'm thinking it's the RAM, and having the fan on 100% will force air across the entire board and cool the RAM (which is why I'm wondering if people who overclock their cards usually run the fan between 80-100%).

Quote:
Originally Posted by LBJM
my 8800GTS (G92) fan at 100% is louder than the gtx 280 at 100%
I don't know if I would mind so much if I only had the one card, but I have two and both of them at 100% is actually pretty loud. Not a huge deal if I have a game turned up, but late at night when I want to game I can't pump up the volume for fear of waking everybody up.

Quote:
Originally Posted by SLippe
Kaguya, as for raising the Core, but not the RAM clocks, just know that most of your performance gain will be from the Core, not the RAM, so always raise the Core Clocks first, then the RAM when overclocking your GPU(s).
I've never been 100% sure of how to properly overclock a GPU, since CPU overclocking you're usually pushing the entire FSB and not really separating the CPU/Memory clocks. So if I was to pump the GPU to say 700 but leave the RAM at around 1066, that won't be too uneven? I guess I just wonder whether having the core going so fast yet having to wait around for the RAM may just waste cycles (which is usually why I copy the speeds of known cards like the FTW since I imagine the ratio between the GPU and RAM that EVGA figured for that card would be optimal).
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Old 07-19-08, 09:59 PM   #9
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Default Re: 100% Fan or Do You Want Earplugs With That?

Quote:
Originally Posted by Kaguya View Post
I don't know if I would mind so much if I only had the one card, but I have two and both of them at 100% is actually pretty loud. Not a huge deal if I have a game turned up, but late at night when I want to game I can't pump up the volume for fear of waking everybody up.
you should water cool them then.
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Old 07-19-08, 10:56 PM   #10
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Default Re: 100% Fan or Do You Want Earplugs With That?

True enough. I need to be more risky and go for a water cooled system when I upgrade next.

So, it turns out it's probably not a heat issue at all. One of my two GTXs (or both, who knows) just doesn't like to run too high. I did some testing tonight to see what I could run at:

Since I know I can run 626/1053 with the fan on Auto, thought I'd up the core and leave the memory.

Using Futuremark Vantage on High:

Test 1: 702/1053 fan Auto - System froze just a few seconds into Jane Nash.

Test 2: 670/1053 fan Auto - Visual artifacts noticeable in Jane Nash. Quit test.

Test 3: 702/1107 fan 100% - System froze a little farther into Jane Nash than before.

So, at this point I realized it's probably not a heat issue, just a stubborn card that doesn't want to be a hero. Then I set out to find where I can set my fan and not have anomalies:

Test 4: 666/1107 fan Auto - Confirmed visual anomalies again.

Test 5: 666/1107 fan 65% - Test completed with a score of H11945.

Weird thing about it, though, is with the fan at 65% my GPUs didn't register a temp above 60C, which says to me that they have no idea what the temperature is, or the auto fan adjust is WAAAY off and it should be scaling a lot sooner.

Either way, I'm happy getting the speed of an EVGA FTW card... I don't want to monster overclock, just get my money's worth. Thanks.
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