680 Overclocking (Calling all owners!)

Can we get a thread of all the current owners posting their max stable overclocking results? By stable I mean at least 1 loop of Heaven Benchmark on Extreme Tess, 4x AA, 16x AF, 1080p settings (rest default). This test seems to fail your card when 3DMark11 won't. After seeing a few people claim to get 1337MHz core stable.. I feel my results are subpar and there seems no way to adjust the voltage manually. I do have another GTX 680 sitting in the box still (friends) and I'm tempted to pull it out to see if it overclocks better.

My best results:
+132% TDP
+135 Core (1141MHz Normal/1194MHz Boost)
+500 Memory (1752MHz)

Never exceeds 79C with fan at 50%. This is a lower core speed than I expected by a good 50-100MHz, so could other owners share their results please? The scores are great either way, but I was pretty much expecting a 1.2GHz core and it could be an easy fix.

EDIT: If your driver crashes (heaven crashes) then you need to restart your entire computer. This is why many people are claiming "I can do +170/+500 but its slower than +150/+500". I've tested it thoroughly and even resetting Precision does not fix it.

I can easily do +190/+500 in heaven stable for at least 5 loops after a driver crash. After I restart my computer heaven will crash instantly and I have to go back down to +135/+500. This is why i'm taking all these +155 to +200 results with a huge grain of salt. I'm looking at their FPS and it's low compare to mine, which leave me to believe they are not restarting their comp after each crash. Even though the card says it's being utilized to 100%, it is not.

Look at FPS in heaven, crash driver, then look at it again. It will be 5-10FPS lower until you restart. Not a full load on the card = unstable overclocks become stable.

EDIT2: The above may only happen when overclocking the memory clocks. I'm just had a crash where it did not happen. Keep an eye on your FPS on the start of Heaven. If it's lower than normal, I suggest restarting your computer before testing for stability.
Edited by Murlocke - 3/24/12 at 5:47pm

We found out in the other thread that setting your fan to 65%+ drastically increases your overclocking stability. Even if your temps are fine.

Give it a go if someone else is experiencing what I was..

+150
+500

Stable right now... going to push more.

Care to run heaven on the max settings in fullscreen? It fails way fast than 3dmark for me. If you really got +170 stable you have a gem there.

DX11
Extreme
16x
Disabled
Unchecked
4x
Checked
1080p

Those are my settings. I just did +160 and it crashed on stage 22... sigh. For some reason though I think my fan started to spin down during the test..

Also my card scored quite a bit higher scores at +135 than +150, even though temps are under 70C. So confused, lol.

Interesting, just as I thought. +150 and +160 were stable in 3DMark for me. Heaven, they both crash before completing. I actually passed once with +150, but the 2nd loop failed.

It seems reviewers were given slightly better cards... They seem to be getting +153 to +155 across the board.

+600 memory is stable for you? I'll have to try that.