Must say overclocking the memory is a waste of time on these cards, little to no increase in performance. Also drivers are a bit touchy when it comes to overclocking. Haven't quite worked it out yet but I get the display driver crashing in a random pattern. For example if I overclock the memory first I can increase +600 without performance drops BUT core will only OC to +170 without driver crashing. If I overclock core first I can get +190 on the core but only +200 on the memory before the driver craps out on me. Also increasing vcore is a total waste of time as the card will increase dynamically to the same level as it needs it. What I mean by this is that the card starts at .987v and will increase consumption to a maximum of 1.175v dynamically during a test or a game and then will lower to .987v when back in 2d. If I use afterburner or Precision to increase volts to 1.175v it just stays there at this level in 2d or 3d which obviously raises temps and makes no sense. Do not bother increasing vcore as it is basically useless and may in fact be detrimental due to increased heat.
Anyhow:
10215 MSI GTX 680 OC @ stock vcore 1293 Core 1855 Memory
http://3dmark.com/3dm11/3119337 Performance
3713 MSI GTX 680 OC @ stock vcore 1293 Core 1855 Memory
http://3dmark.com/3dm11/3119361 Extreme.
I will be getting my waterblock next week but seeing how I am unable to raise vcore and my temps are not bad I believe that I have tapped out this particular card. Perhaps I will get another 10-20mhz on the core!