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680 OC'ing (what does yours do?)

F

Ferzerp

Diamond Member
What's yours do?

I haven't found the limit yet, but 1215 Mhz with no voltage adjust is stable in furmark. Sadly, I must leave and can't test more tonight.
 
I'm leaving mine stock for now. I'll tinker with OCing when I get my waterblock. The card already hits high 70's stock. I just got rid of a card that goes to 90C, I'm not looking to edge my way back up there haha.
 
+100mhz offset is the most I can get in EVGA precision.

I don't get much added performance with oc'ing at all on the 680, doesn't seem worth it. Maybe i'm doing it wrong.
 
Mine is stable in Furmark at 200 mhz gpu offset which runs between 1190-1233 mhz and the memory offset at 384 (6772 mhz I think). I haven't tried higher on the memory yet but i went 30 higher on core and the driver crashed after a minute or so. I'm not sure if that memory speed is stable in everything since furmark doesn't seem to use much memory, but I'm pretty impressed by the memory clock so far and will push it higher and see what happens. I'll test in battlefield later on.

http://i.imgur.com/0Lx0S.jpg


Olikan said:
hey, i have a question for 680 users...

can u undervolt?
Click to expand...

Doesn't look like it, but I noticed while playing starcraft 2 that it was mostly running around 800 to 900 mhz core and getting over 100 fps. I thought it never went below the base clock but it seems that it does when its not being pushed (gpu usage was at like 40% or something). It worked out pretty well since it was around 50 - 55 C and low fan speed and still over 100 fps (2560x1600 highest settings).

Update: Actually in unigine heaven I was getting texture tearing at those settings so I'll have to spend more time on figuring out proper settings next week
 
Last edited:
Using EVGA Precision X and a lot of free time (lol) managed to get:

+165 GPU
+425 Mem

I suppose that I can get better results with better cooling.

CPU: i7 940 w/ stock cooler and default clocks (2.93 GHz)
 
badb0y said:
I thought when you OC the GTX 680 it dynamically changes voltages as well, am I wrong?
Click to expand...

I believe it does, and it's still controlled by the dynamic boost which is limited to TDP cap.

Right now the max you can give it over stock TDP is +32%, or 225 watts. It's a major hindrance in overclocking currently.
 
Wonder why nvidia decided to cap the tdp at 225w?

Nvidia must have something up their sleeves cause if i know nvidia,overclocking is what people do and performance is what they showcase.

Maybe making room for gk110...hope somehow that tdp lock is removed.
 
Someone brought up an interesting point, +32% could be a limitation within the current EVGA Precision program, maybe more will come later... But as it stands now it's the only program that you can use to OC the 680 and it's limited to 225 watts.
 
I spent a few hours overclocking it tonight, I found the max stable o/c for me is 1256 core/7030 memory. That is 171 gpu offset and 510 memory offset. Any higher on the core will artifact/crash in 3d mark 11. I haven't actually found the ceiling on the memory yet but I can't imagine it's much higher than what it's at right now. I will figure out tomorrow night though. I tested using 3d mark performance and xtreme runs along with BF3 at 2560x1600 ultra.

My friend also got a 680 and claims he can't go over I believe 100 on the offset without crashes, so I guess it varies a lot.
 
Nice to hear people's early results in this thread. I'm going to get one in May with an IB system, hoping to hit 1200 stable, that would be gravy (~20% OC on GPU). I hope MSI has a Twin Frozr version out by then.
 
One thing I have noticed, if you push it too hard and cause a GPU failure, you lose your increased power maximum until a reboot, or at least I did in the once case that I pushed the memory too far. Suddenly, my power usage would never go above 100ish (sometimes it spiked to 105 or so), and my clocks stayed lower to remain under that power limit. (I have the power limit set at 132%).
 
I may leave mine as it is for a while. The 132% power is just text in a CFG file, I wonder if it's actually a hard limit, or just as much as the gui allows....
 
I am still testing for stability, but so far I got to +190 offset gpu and +450 offset memory. This translates to actual boost clocks of 1322Mhz at <70C (1.175v), 1313 at 70-80C (1.162v), and 1300 at > 80C (1.150v) as reported by Precision. EVGA GTX 680.

So yeah, 1.3GHz on air. Also, this card is so much quieter than my 7970, it's not even funny.
 
Stable OC for me is
132%
+145
+475
That translates into 1215 gpu core clock and 1740 mem clock.
I'm not 100% sure on the stability of the memory but so far no crashes during Heaven benchmark runs and BF# multiplayer matches.
 
BallaTheFeared said:
Someone brought up an interesting point, +32% could be a limitation within the current EVGA Precision program, maybe more will come later... But as it stands now it's the only program that you can use to OC the 680 and it's limited to 225 watts.
Click to expand...
+32% is 225W. It's almost certainly an intentional limit to keep users from exceeding PCIe power limits.
 
132 - power
150 - gpu
200 - mem

will probably try and push the ram a bit more (seems like 400+ should be doable for most people, but just went by the average the review sites were using)
 
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