[Official] MSI GTX 680 Lightning Owners Club - Page 186

So whats the highest stable overclock on air with the Lightning so far guys? Voltage too please.

what would be a good voltage offset to start out at? Is it safe to crank it all the way up?

With AB 2.2.3?

I started out at +67 on core, +50 on mem, and +40 on aux. Temps were fine, I ended up maxing all out with no outrageous temps but +93 is max I can run on core.

And I just use 2.2.2 for daily driving, it does all I need for daily use.

thanks, i just tried +56mv, +400 mem, running 1350 boost so far no issues at all, and this is what i get in heaven. Looks like a might break 1400 soon. Im going slow so i will probably wait tell tomorrow to OC further.



Edited by pwnzilla61 - 7/31/12 at 9:13pm

in 2.2.3 there's a little arrow just to the right of the core voltage slider, click that and it'll show the mem and aux volt sliders. You can also play around with those.

IMHO, the best approach is to increase slowly if you run into instability. Start with core voltage first and as adjust in small increments.

If you go in with guns blazing and max everything you'll just increase your temps when you probably could get the same OC with a much smaller voltage (desirable)

Yeah ,I've been going slow and this is where am, i think the voltage is a lil higher than needed for those clocks, but i am goin up 10-20 mhz at a time. mem i pushed +50 at a time. and started out at +50mv. fan is at 67 with temps never going above 50c. I am in a chilled basement.
Edited by pwnzilla61 - 7/31/12 at 9:35pm

Ok, tests are in and some very good news and bad news.

Lets start with the bad news first. The LN2 bios is only meant for benching, and if you try to play aggressive games on it MAXED OUT ( CRYSIS 2) at very high resolutions
it will fail. Why does it fail?? Because the LN2 bios is buggy and has a memory leak in it. It does't flush properly when its supposed to. It might be designed this way for protection.

Now on to the good news. I moved the bios switch on the card to its original position which is the default bios. Boost is 1176 on this bios
Did a few voltage tweaks on afterburner 2.2.3 set the core clock to 1300 and memory up 300 mhz and fan manual 95%
Ran benchmarks with Heaven 3.0 and 3dmark2011. All completed several times with no issues and no throttling of gpu.
Now my biggest worry was will this puppy be able to play crysis 2 maxed out on ultra and TESS enabled on a 2560x1440 res
Played 1:45 min with no lock ups Closed the game out and I went to go check the log on memory load during game play. The highest it hit was 2008 and flushed within a split second
and went to 1900 which is the way its supposed to be when the buffer is working correctly with out a memory leak.
Next test moved up to 1350 core 400 plus on mem voltage at .67 and fan still on 95% Went to play crysis 2 again for 1:40 minutes no hiccups whats so ever.
Closed out the game and i went to go check the monitor log again to see If the card at any point throttled and it didn't except for cut screens. Temps never above 60c at anytime
FPS was 31 to 52 depending on the scene. I think these are very good results for a maxed out crysis 2 on a 2560x1440 res.
I was about to rma this card today and I'm glad I didn't. Hopefully they find the bug in the LN2 bios and give us an update.

At what temp does this card begin to throttle is at 70c??

Dude, really Crysis 2 is easy mode with this cards. Head over to Guru3d or Google Maldo HD mod, it looks 10x better then the default Crysis 2 and runs like 5-10 fps better AT LEAST while looking miles better

Interesting, you're making me want to replace the TIM too Is the dissembling process not too difficult?