Originally Posted by Kimir
Edit: ok so I'm back with LN2 bios and the 320.49 drivers and I can OC a little, not touching vcore and power limit, +100 on core and usual +600 on mem and Crysis 3 is ok. Fine enough for daily use (I was used to 1306Mhz, 1280Mhz will do).
I tried my second profile with +75mv, 250 power limit, +150core and 600 mem and I crashed. If I remember correctly I took the 680/770 Lightning version of AB beta 11 so core voltage should be working... gotta get that multimeter tomorrow and check that.
Played too much Crysis 3 for today
C3 works beautifully with with my 680L but it took a lot of tweaking.
1. I get better stability with SSDO replaced by SSAO. If you use "very high" sys spec, just add this to autoexec.cfg:
r_SSDO = 0
r_SSAO = 3
2. I get better stability with CUDA processing disabled in NV CP; no idea why, since AFAIK there is no NV Physx or directcompute etc in C3, but it works for me.
3. Using RTSS to cap frame rate at 60 and setting vsync off both in CP and game settings works for me. Seems to work better than setting a frame limit in autoexec.cfg, and definitely better than using vsync.
With those 3 adjustments, I eliminated the stretched polygons that I get otherwise when I push the Lightning. I also use either fxaa or smaa medium in the game's AA settings. Adding:
r_Sharpening = 1.0
to autoexec.cfg gives me a nice image with AA on.
In C3 MP, I find that Origin in-game can cause crashes. I keep it off and no probs.
I'm on air, so I use: +12mv, +53mhz core // -50mv, +700mhz mem // -100mv aux // +150% power limit. Using 80.04.28.00.3A unlocked LN2 BIOS, 320.49 driver, and AB 3.0.0 beta 11 from guru3d without the profile hack. With a few additional game settings tweaks, I'm getting a consistent 60fps in MP with a single 680L on air, and almost no frametime spikes. I do see 72 - 75c in C3 depending on ambient temp, but I think she'll last until Maxwell comes along, which is all I need
FWIW, my 3930k will do 4.6ghz without a hitch in all games, incl C3 SP, but it will crash in C3 MP. No idea why. No probs with 4.4ghz. So, maybe look into your system OC as well?