Here are my results:
GPUz Validation - http://www.techpowerup.com/gpuz/6yf2c/
Using the stock bios and stock air cooler, I was able to get the following:
Core Voltage - +31 (But AB monitor shows this to stay around 1.2 V under load)
Mem Voltage - 1700
Aux Voltage - 1150
Power Limit - 109%
Core Clock - +205, but GPU Boost takes it to 1306 during benchmarks
Mem Clock - +300
In my testing the memory proved to be the most limiting factor. I also had to make a more aggressive fan profile. At load the fan has to run about 80% to keep temps in the low 70s.
You guys on LN2 BIOS and water cooling should be able to do 1400+ easy. Is it possible to soft mod a BIOS with these settings so it will also work under Mac OS X?
Update - I found a really cool tool to soft mode the BIOS:Svet's VBIOS Tool
It works great with the stock bios. The only limitations to BIOS soft mod is that memory and aux voltage cannot be changed. It seems those can only be altered via AB. I did some quick testing and so far so good. On my Mac, I am able to run:
Core Voltage - +37, 1.212 max
CPU Boost - enabled and shows 1244 at load
Mem/Aux - Stock
Power Limit - 100% (have not figured out how or if this can be changed in BIOS)
Core Clock - +140
Mem Clock - +250
Fan Control - Changed to hit at 70 deg and increased fan speed to 62%
I will play around with the power settings to see if I can improve. On my Mac, all benchmarks are already 10% or more higher than stock. This seems to be a relatively low risk tool to use. I incorrectly set mem to +500 once and Windows booted fine, but only 3D benchmarks caused a crash. Also, having dual bios on the card creates a fail safe in case something really gets out of whack.
One last interesting note - I purchased my card from Newegg on 10/30 and my card did not have an LN2 BIOS installed on the 2nd BIOS. Instead, it was a pure GTX 780 BIOS with lower clocks than Lightning stock BIOS. It also did not show the "LN2" label in AB.Edited by Mac Hack - 11/12/13 at 8:48am