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[OFFICIAL] GTX 670 Overclocking - Page 63

post #621 of 1562
This may be kind of silly, but is the latest driver the most stable? Just got my EVGA gtx 670 FTW today.
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post #622 of 1562
Quote:
Originally Posted by brettjv View Post

The way it works is that under most conditions your actual operating frequency will be Stock Boost Clock + whatever Offset you apply in an OC'ing tool + your individual card's 'Kepler Boost'.
The sum of the first two values is what you'll see listed in GPU-Z as the Boost Clock, and the sum of all three is what you'll see in the Afterburner/PresX/GPU-Z graphs when the card is put under a full 3d load.
Most of the 670 cards people around OCN have received are showing a Kepler Boost value in the range of 75MHz - 150MHz, average is probably about 110 or so. My particular GB card has a KB of 130MHz, so when I run 3d apps (at stock clocks), I see an actual core clock of 1189MHz (1059MHz Stock Boost + 130MHz KB) when I monitor it in the Afterburner graphs. Most folks around here call this value the 'Max Boost' you're getting on the card.
There are however conditions under which your clocks could end up lower, such as if your GPU usage is low, the card will downclock to save power, or if the card is consuming too much electricity vs. it's target power consumption value, or if the temps are too high it could also downclock a bit. Raising the cards Power Limit in an OC'ing tool like AB is a way to potentially avoid a small amount of downclocking the card might do if the card is drawing more juice than it 'thinks' is appropriate.
Here's a screenshot to illustrate. In this I've OC'd the card by +148, so my actual 'max boost' on load is 1337. The difference between what GPU-Z says is my boost clock and what AB says is my actual operating frequency (1337-1207) is my KB of 130MHz.
286

Ah OK. Since I have a 650W PSU would that still be enough to power a (gigabyte) GTX 670 OC when I OC on top of the factory OC?
post #623 of 1562
what psu do you have exactly ?
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post #624 of 1562
Quote:
Originally Posted by pc-illiterate View Post

what psu do you have exactly ?

Corsair HX-650W.
post #625 of 1562
My entire system (see my sig rig) draws about 420W AC from the wall running an intensive bench like Heaven. Accounting for AC/DC conversion efficiency of around 85%, that means I'm using about 355W from my PSU.

So, yeah ... a 650W is WAAAAAY more than enough.
    
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post #626 of 1562
Thread Starter 
Quote:
Originally Posted by brettjv View Post

My entire system (see my sig rig) draws about 420W AC from the wall running an intensive bench like Heaven. Accounting for AC/DC conversion efficiency of around 85%, that means I'm using about 355W from my PSU.
So, yeah ... a 650W is WAAAAAY more than enough.

How do you find out total power usage?
post #627 of 1562
I used a Kill-A-Watt to monitor power usage.
    
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post #628 of 1562
Quote:
Originally Posted by Bosniac View Post

How do you find out total power usage?

Yeah dude your super safe with your corsair 650, heck you can almost sli, maybe you could but I believe it would be pushing it personally.

My system gaming on bf3 multiplayer with a kill o watt was around 325-335watts at the wall, so less output on the psu, maybe 300watts? Too lazy to do the math. My peak actually was achieved at the menu screen after a match which hit 355watts. Kinda funny but oh well.

The pic is when I was actually in a game running and took the pic with my phone, idle is like 115watts
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post #629 of 1562
Quote:
Originally Posted by samwiches View Post

Is there a reliable way to set a global frame rate limit? I'm getting 200+ FPS in some games with the card going past 70% power target. It's a waste, and the fans get relatively loud.

Yeah, in the Nvidia control panel, go into your global settings.

Set Vsync on for everything. You should be set.
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post #630 of 1562
Thread Starter 
Quote:
Originally Posted by brettjv View Post

I used a Kill-A-Watt to monitor power usage.

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