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[OFFICIAL] GTX 670 Overclocking - Page 17

post #161 of 1562
Quote:
Originally Posted by Darylrese View Post

s into the case. Now my H100 is an exhaust im getting great temps on my GTX 670.

Can anyone tell me though why heaven seems to only use about 1267mhz on the core clock whereas when i run games they use the full 1303mhz??
Yah sometimes it can be hard to even get these cards to fully load. For example you may think +100 gives you 1225 then all of a sudden in game it will jump to 1245. Kind of annoying if you ask me.
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post #162 of 1562
Overclocking is a little annoying on these cards. I get 1275mhz - 1300mhz depending on game but if i set my power control to 117% (max available) so that it runs 1300mhz all the time the driver crashes. If you leave it at 100% but the game runs it at 1300mhz it doesnt crash...how weird is that.

Are you supposed to leave the power control at 100%? (default)

In DIRT 3 it runs 1300mhz all the time. In Crysis 2 and Heaven 3.0 it varies between the 2 values above..is this normal? It doesnt actually seem to make any difference to performance or FPS when this happens. My temps are good, max is 64c since i changed my H100 fans to exhaust.

Im hoping my overclock is stable but not sure if by setting power control to 117% and getting a crash means my clocks are unstable or if it just doesnt like that increased power control setting.

I dont get a single crash when overclocking with these clocks with 100% power control setting.
Edited by Darylrese - 5/23/12 at 5:17pm
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post #163 of 1562
It's because of how these cards decide to initiate the boost. It's based on voltage, temperature, and GPU load. That's why i said once you get your max stable overclock with the max power target you should try reducing it and see if you can overclock more. For some reason if voltage is high but temperatures are still under 70C, they decide to throttle anyways. I don't know the reason why this is, but it worked for the 680s too. Usually keeping the power target low is better.

If you crash with 117% power target then that's not a stable overclock. Just drop it to 100% if that's allowing you a higher stable overclock.
post #164 of 1562
Yeah ill keep it at 100% power control, im happy with the performance. It only varies by 20mhz as a rule which hardly makes any difference anyway redface.gif

DIRT3 and Project CARS are both running at 1300mhz all the time and it doesnt crash smile.gif Crysis 2 and Heaven run at 1267mhz - 1300mhz without crashing too.

Last question, does it make ANY difference running these cards @ PCI-E 3.0 with an IvyBridge CPU?
Edited by Darylrese - 5/23/12 at 5:42pm
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post #165 of 1562
Quote:
Originally Posted by Darylrese View Post

Last question, does it make ANY difference running these cards @ PCI-E 3.0 with an IvyBridge CPU?

You'll see a very minor performance increase with 3.0 over 2.0. It's only about a 1% increase though rolleyes.gif
post #166 of 1562
I think I'm going to leave it at 100% power target myself....I never see it rise over 80% anyway.....I guess leaving it at 111% is cool too, but if Darylrese is reporting instability, I guess it wouldn't hurt me either to try 100% and not worry down the line

What exactly is the power target % anyway? I never understood this value....I only see that it never goes to what I specify in MSI AF
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post #167 of 1562
Quote:
Originally Posted by steven88 View Post

I think I'm going to leave it at 100% power target myself....I never see it rise over 80% anyway.....I guess leaving it at 111% is cool too, but if Darylrese is reporting instability, I guess it wouldn't hurt me either to try 100% and not worry down the line
What exactly is the power target % anyway? I never understood this value....I only see that it never goes to what I specify in MSI AF

Adjusting the voltage target shouldn't do anything as the voltage on the GTX 670 series is locked (for now).

I haven't pushed the limits of my card yet but so far, I managed a 100+ boost on the Gigabyte revision (1.3Ghz clock) and 335+ on memory. I am really not sure what I am doing and the poster who mentioned it has more to do with heat and the GPU decides to clock is probably right as my GTX 670 is ridiculously cool (26C at idle, 55C at full load). I will try fooling around more and see what I get.
post #168 of 1562
Quote:
Originally Posted by Asad_A203 View Post

Adjusting the voltage target shouldn't do anything as the voltage on the GTX 670 series is locked (for now).
I haven't pushed the limits of my card yet but so far, I managed a 100+ boost on the Gigabyte revision (1.3Ghz clock) and 335+ on memory. I am really not sure what I am doing and the poster who mentioned it has more to do with heat and the GPU decides to clock is probably right as my GTX 670 is ridiculously cool (26C at idle, 55C at full load). I will try fooling around more and see what I get.

I know the voltage is locked on the 600 series cards...but I'm talking about the power target value...what exactly is that?
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post #169 of 1562
I got to EVGA Vanilla's, well I ordered two. One of them won't go below 966MH'z. Also that one, won't overclock that much either. Even in one card setup it won't. The one with the stock reading of 915, I can +200 Boost & +475 Memory.

2nd card @ stock settings below

394
Edited by PatrickCrowely - 5/24/12 at 2:10am
 
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post #170 of 1562
Quote:
Originally Posted by steven88 View Post

I know the voltage is locked on the 600 series cards...but I'm talking about the power target value...what exactly is that?


I think it's more so of a feature to keep steady power to the card (keeping the voltage as high as it can) Otherwise, give you more stability with the OC
 
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