Official GTX 680 overclocking Thread!

I do feel for you guys unable to achieve what would be considered a decent OC. Just keep in mind that you have one hell of a powerful gpu at stock settings
 
Ghoststalker said:
Good lord, my overclocks SUCK in comparison to what I see here. +120/+275 seems about all I can manage, unless the driver crash I get in BF3 at higher speeds isn't related to the clocks.
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Eh, I can only do +135 but my stock boost clock is also pretty low so that +135 is only 1215mhz and thats only if I can keep the card under 70c which hasn't been a problem so far. Still, +135 and +300 seems very stable and provides a solid boost in some games.
 
BababooeyHTJ said:
Eh, I can only do +135 but my stock boost clock is also pretty low so that +135 is only 1215mhz and thats only if I can keep the card under 70c which hasn't been a problem so far. Still, +135 and +300 seems very stable and provides a solid boost in some games.
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I think this is about the same clocks as mine will do, I didn't check my boost clock though :confused: Think I'm gonna just right +135/+300 in my sig as most clocks are different lol

Well...I wasn't stable at 135 to 140, so I lowered my power thingy to 120 and played BF3 with out any errors. Its strange that at 132 my temps never went above 70c...but at 120 my temps are pegged at 65c, no higher and no lower.

I seem to be more stable the less power target I use, even though I didn't go over 70c when I was at 132. My default boost is 1124 btw...and at 140 my card runs at 1254.
 
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Managed to get it at 181+ Clock offset and 575+ memory offset.

http://imgur.com/a/4tVwf#0

Second image shows all the fun info for behind the scenes. I'm surprised the bottom card goes to 1320MHz, but the top one sticks to just under that. They're at the same temp most of the time during the run so I'm not sure why there is around a 30MHz difference. Maybe just card quality...
 
My memory is BEAST but my core clocks aren't so hot...

PNY Brand:

1157 on Core (+60 offset)
7200 on memory (+600 offset)
 
CrunchTime said:
My memory is BEAST but my core clocks aren't so hot...

PNY Brand:

1157 on Core (+60 offset)
7200 on memory (+600 offset)
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My card will run at 600 memory as well but it is actually slower than when I put it ay +450. Remember the ram is ECC and just because it runs at some speed doesn't mean it is working any faster :)
 
Sojuuk said:
My card will run at 600 memory as well but it is actually slower than when I put it ay +450. Remember the ram is ECC and just because it runs at some speed doesn't mean it is working any faster :)
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Well it finally crashes at +750 and my live monitoring shows that it is running @ 3600 (7200 mhz) so I know it is working at that speed. What do you mean it's slower? Actual benchmarks show that it isn't as fast? That is probably because your card is downclocking due to not having enough power thrown at it.
 
CrunchTime said:
Well it finally crashes at +750 and my live monitoring shows that it is running @ 3600 (7200 mhz) so I know it is working at that speed. What do you mean it's slower? Actual benchmarks show that it isn't as fast? That is probably because your card is downclocking due to not having enough power thrown at it.
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No, GDDR5 has built in error-correction and if it detects errors it will slow itself down to compensate, so just because it is running at XXXX MHz doesn't mean that you are getting increased performance or it is stable. Run benchmarks at each speed to ensure it's actually increasing performance.
 
Rizen said:
No, GDDR5 has built in error-correction and if it detects errors it will slow itself down to compensate, so just because it is running at XXXX MHz doesn't mean that you are getting increased performance or it is stable. Run benchmarks at each speed to ensure it's actually increasing performance.
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Thanks for the info... I will run benchmarks later. Were you able to clock your ram higher than 400 and be stable but with a decrease in performance?
 
Rizen said:
No, GDDR5 has built in error-correction and if it detects errors it will slow itself down to compensate, so just because it is running at XXXX MHz doesn't mean that you are getting increased performance or it is stable.
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It probably starts retrying memory requests, which kills performance.
 
CrunchTime said:
Thanks for the info... I will run benchmarks later. Were you able to clock your ram higher than 400 and be stable but with a decrease in performance?
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I'm still working on my overclocks. I can run +175/+400 in 3DMark11 and it has no issues (performance is up) but I crash in BF3.
 
CrunchTime said:
Thanks for the info... I will run benchmarks later. Were you able to clock your ram higher than 400 and be stable but with a decrease in performance?
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In the case of my card, yes. I started seeing diminishing returns after +350 on RAM, declining scores after +400, and artifacting/crashing after +450.

I just set it to +300 and called it done.

You get your biggest perf boost from core increases, which on mine is +150. It'll bench in 3DMark11 at +175 (P10800!), but isn't stable in Haven 3.0 past about 5 minutes. At +150 core it's good for hours and still benches P10600.
 
Hi all, I'm new here and read alot about others with GTX680 overclocking experiences. I got mine 2 days ago and it's an EVGA one I bought from www.overclockers.co.uk and I must be one lucky mofo because it overclocks AMAZINGLY. I will give you some details what I could reach so far.
Using 301.10 drivers and MSI Afterburner 2.2.0 beta 15 > settings> enable low-level hardware access interface: user mode > Unlock voltage control > Unlock voltage monitoring > Force constant voltage > Power limit slider 132%.
Core voltage (mV): +100
core: +200Mhz
mem: +500Mhz
fan on manual 70%

Benchmarks 3DMark2011: P1100+ ( I will run it again to get exact number and screenshot later)
Crysis 2 Adrenaline benchmark with HD texters and all the bells and whistles ULTRA:
Central Park run > Avg FPS = 79.1
Downtown > Avg FPS = 79.1
Times Square > Avg FPS = 82.6
Dirt3 Adrenaline benchmark ULTRA everything (NO AA):
Avg FPS = 153.7
Battlefield 3 all on Ultra and using FXAA
Caspion Border 64 player conquest mostly over around ~150fps very few rare dips in the 90fps but always above 100fps
Heaven DX11 ran it once but didnt save the result, just wanted to see if I could run that as well and see if the overclock was stable. Will run again and post screenshots with the 3DMark2011 later or this weekend.

All this time testing my temps would not exceed 55 degrees celcius and on some games and benchmarks it would stay below 50 degrees celcius, all this with manual fan at 75%.

Again I have NEVER EVER had luck with a GPU that overclocks this well and I'm going to use the shit out of it now and try and get as far as possible on it :)

Little update: in my sig it says core 1.4Ghz but wont play BF3 for more than 30 min, would get black screen and have to end BF3 process. Everything else stays stable on that frequency.
 
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Rizen said:
No, GDDR5 has built in error-correction and if it detects errors it will slow itself down to compensate, so just because it is running at XXXX MHz doesn't mean that you are getting increased performance or it is stable. Run benchmarks at each speed to ensure it's actually increasing performance.
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ECC has to be enabled via the memory controller and it isn't on 5870, 6970, GTX580, and GTX680.

Its actually crc that causes the performance degradation with unstable overclocks.

EarlyAdopter said:
You get your biggest perf boost from core increases, which on mine is +150. It'll bench in 3DMark11 at +175 (P10800!), but isn't stable in Haven 3.0 past about 5 minutes. At +150 core it's good for hours and still benches P10600.
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Thats not necessarily true with GTX680. GTX680 seems to scale really well with memory clocks. Check the Anandtech review and alienbabeltech's recent GTX680 overclocking comparison.
 
BababooeyHTJ said:
Thats not necessarily true with GTX680. GTX680 seems to scale really well with memory clocks. Check the Anandtech review and alienbabeltech's recent GTX680 overclocking comparison.
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I looked at both and can't find what you're talking about -- do you mind linking specifically?
 
CrunchTime said:
Thanks for the info... I will run benchmarks later. Were you able to clock your ram higher than 400 and be stable but with a decrease in performance?
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I was able to run at 650 but it benched almost as slow as stock did.
 
BababooeyHTJ said:
Here you go.

Also, Anandtech came to the same conclusion in their GTX680 review. Crysis scales really well with memory clocks from what I've seen.
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I stand corrected! Thanks for posting that link. I hadn't seen that article and wasn't aware that overclocking memory boosted frame rates so much. I was going by increases in 3DMark11 scores I was measuring, which scale with core increases much more rapidly than memory. Gonna go back and see if I can push the RAM a bit more.
 
Klapcos said:
Little update: in my sig it says core 1.4Ghz but wont play BF3 for more than 30 min, would get black screen and have to end BF3 process. Everything else stays stable on that frequency.
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Your choice, but I'd stay change it to what's stable across everything :p
Otherwise this leads to sig inflation and the false perception of everyone running at obscene clocks.
 
I think I will stick with these clocks..pretty stable I think.

Power +120
GPU +125
Mem +400

Gives me 1249/3404 in all games...cant complain I suppose :0
 
Changed it back to 1350Mhz and increased the mem to 7100Mhz and stable across everything I could throw at it now. That is:
power 132%
core +200Mhz
mem +550Mhz
fan manual 75%
 
Broke 10k in 3D mark 11...I upped my ram from 400 to 470 and that gave me a extra 600 points :eek: hope it helps in BF3.
 
The best I can do is

power 132%
core +135Mhz
mem +500Mhz
fan manual 75%

It stays at 1202mhz while gaming
 
thenightman4u said:
The best I can do is

power 132%
core +135Mhz
mem +500Mhz
fan manual 75%

It stays at 1202mhz while gaming
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Its kinda strange that I need less offset for a higher clock in games than you.

+125 gets me 1249mhz :confused:
 
That's something I don't understand about this, one person can have the same settings but get faster clock speed.
 
thenightman4u said:
That's something I don't understand about this, one person can have the same settings but get faster clock speed.
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Whats your boost speed ? mine is 1124 the same as a Evga SC card, but mine is only the regular 680.
 
thenightman4u said:
That's something I don't understand about this, one person can have the same settings but get faster clock speed.
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Not all cards have the same maximum boost multiplier it seems. At stock mine boosts to 1087 or something while some people get 1110 and other don't go over 1056. I dunno what the card is using to decide these things but it sure seems out of our control.
 
So I guess the final OC is the speed the card runs all games correct ?
 
Something still is off though, Mine is default boost at 1058 and I have offset to +135 so that should equal 1193 but I get 1202
 
thenightman4u said:
Something still is off though, Mine is default boost at 1058 and I have offset to +135 so that should equal 1193 but I get 1202
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Bump up the fan speed so that the card stays cool and run heaven with the offest set to 0 to see what your boost clock tops out at. It will be higher than 1058.
 
thenightman4u said:
That's something I don't understand about this, one person can have the same settings but get faster clock speed.
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It just adds the overclocked frequency to whatever the stock boost is for the card, and since all the cards have different boosts they will all have different final overclocks. You should be able to compare final clocks though - for example mine goes to 1260 when fully loaded and at operating temperature, so no matter what offset I needed to get there, that's the freq I tell people my card runs at. It also varies by temp (and by power load, but I've never seen mine drop down) so it is trickier to make comparisons than it used to be.
 
How does increasing voltage work? Does it actually increase to help with the core clocks or what?
 
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