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~~The GTX 670 Overclocking Master-Guide~~ - Page 203

post #2021 of 3357
Quote:
Originally Posted by Sutenvulf View Post

Hello

Excellent guide, however I have a couple of questions if anyone can help as I've not overclocked anything before.

I'm running 2 Gigabyte 4gb 670's SLI which are connected to 3 120hz monitors, I've turned sync off and I am going to OC one after the other, I'm following the quick guide and got to the first benchmark, setting a custom resolution and apart from selecting Multi monitor in Heaven, everything is as it is in the guide.

However when the benchmark begins I can see everything but it is as if there is a thin veil of blue mist over the screens, this only happens in the benchmark not in a normal run through, is it normal or am I doing it all wrong?

Thanks in advance for any advice.

Hi there.
I think when running SLI you have to overclock both cards together and at the same speeds of the lower card.... You can't have one card run at 1200mhz and one at 1100. They have to run at the same speeds.
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post #2022 of 3357
Quote:
Originally Posted by jimskeet2002 View Post

Hi there.
I think when running SLI you have to overclock both cards together and at the same speeds of the lower card.... You can't have one card run at 1200mhz and one at 1100. They have to run at the same speeds.
This is true, but overclocking the cards separately (with SLi off) can be a good way to see how each individual card OC's, then you know the max SLi OC based on your lowest cards stable clock.
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post #2023 of 3357
Quote:
Originally Posted by Draknareth View Post

This is true, but overclocking the cards separately (with SLi off) can be a good way to see how each individual card OC's, then you know the max SLi OC based on your lowest cards stable clock.

and you can also find out which card you want in your top slot for those times sli isnt supported and you run just 1 card enabled wink.gif
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post #2024 of 3357
I have three cards in my rig. Two of them are EVGA GTX 670s FTW 4GBs in SLI. They seem to have a minimum fan speed of 30% and a maximum of 80%. The other card is an EVGA GTX 660 SC 2GB and it has min and max of 30% and 75%, respectively.

Are these set in the BIOS of the cards? Or can I adjust them somehow in Precision-X?

The guide in this thread shows min and max of 10% and 100% and the fan curve creation guide seems to count on these values. So, I can't really follow the guide as written unless I can alter the min/max properties on these cards.

I'm fine with adapting my approach if need be. But I figured first it would be best to see if these floors and ceilings can be modified in the software. I don't plan to mess with the BIOS of the cards.

Thanks,
JML
post #2025 of 3357
Hi All!

So I posted my OC results of the Palit Jetstream earlier (quite unimpressive really).

I was wondering if lowering the voltage slider on the Precision X utility will help with the temps I'm getting? Because as it is, I could not run a "Maximum Performance" fan profile so I resorted to the "Quiet" profile in the guide. My card runs beyond 70c even with the fans turned up at max (90%).

Maybe lowering the voltage but keeping the same offsets will help with my temperatures, but I don't know if it will help at all... Any advice?
Edited by mokmoki - 3/24/13 at 8:03pm
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post #2026 of 3357
Whoa, sorry, internet fail resulted to double post... Sorry! frown.gif
Edited by mokmoki - 3/24/13 at 7:59pm
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post #2027 of 3357
Anyone got experience with FluidMark? Or know where to find a decent guide to using it?

I'd like to really get some sense of how well my PhysX setup is working, but I don't find the software terribly intuitive and they don't seem to have a manual.

Thanks,
JML
post #2028 of 3357
Quote:
Originally Posted by JML10166 View Post

I have three cards in my rig. Two of them are EVGA GTX 670s FTW 4GBs in SLI. They seem to have a minimum fan speed of 30% and a maximum of 80%. The other card is an EVGA GTX 660 SC 2GB and it has min and max of 30% and 75%, respectively.

Are these set in the BIOS of the cards? Or can I adjust them somehow in Precision-X?

The guide in this thread shows min and max of 10% and 100% and the fan curve creation guide seems to count on these values. So, I can't really follow the guide as written unless I can alter the min/max properties on these cards.

I'm fine with adapting my approach if need be. But I figured first it would be best to see if these floors and ceilings can be modified in the software. I don't plan to mess with the BIOS of the cards.

Thanks,
JML

This can be modified in BIOS. However, you should be able to follow the guide either ways. 100% is your highest possible fan speed, and not necessarily 100%, the same goes for the lowest fan speed. Whenever you are asked to put your fan speed at 100%, put it on 75%, and start from there.
post #2029 of 3357
Quote:
Originally Posted by iRandomize View Post


This can be modified in BIOS. However, you should be able to follow the guide either ways. 100% is your highest possible fan speed, and not necessarily 100%, the same goes for the lowest fan speed. Whenever you are asked to put your fan speed at 100%, put it on 75%, and start from there.

Yeah, that's what I meant about adapting my approach if need be.

JML
post #2030 of 3357
Small question from me - I own a GTX 660Ti Power Edition but this guide suits me very well.

I got my final Kepler Boost clock at 1333 MHz on core and 7400 MHz on memory. For 24/7 I decided to back down memory to 7200 MHz.

I'm using MSI Afterburner because in Power Edition cards it lets You overvolt the card over 1,175v. So I added +60mv voltage.

Now I have a weird problem:

In Heaven or Valley benchmarks I get high GPU usage, I'm around 100% power target (whenever it goes higher than 102-103% card declocks itself, although i set power target to 114% which is maximum for my card - same with EVGA Precision X) and the clock is stable at 1333 MHz on core.

But for example when I run 3dmark 11 I get 105% power usage sometimes and also low GPU usage which results in card declocking itself even to 1150 MHz.

In games it depends on a game - In Far Cry 3: constant 100% gpu usage, clocks 1333 MHz on core = good performance
Skyrim: GPU usage rarely goes over 70%, power % max 80-90% = good performance although sometimes it drops from 60 to 45 FPS (I use loads of mods but max 1,8 GB Vram) - clock varies from 1150-1333 MHz
World of tanks: GPU usage:50% power% 80% = mediocre performance - often see FPS drops although can't find the reason why GPU usage is so low (everything maxed out). FPS 60 stable but during fights they drop to 40 and than I see stuttering. And I can't find the reason why gpu usage is so low - on gtx 560 Ti it was 90-95% although I couldn't run the game at max settings. Clock varies (goes down even to minimum 1080MHz)

CPU: Core i5 3570K @4,5 GHz

Any advices on this? My temps never went higher than 60 degrees with 50% fan (got nice fan profile, and very well cooled case).
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