Been following this thread for a while and I was one of the people who managed to get a hold of the modded BIOS before they were taken down. Here's some comparison details for those wondering:
Graphics Card Tested: MSI N760 Hawk using stock cooling
Stock LN2 BIOS-
1205/7500 @ 1.3v
This is the maximum overclock I could achieve on the core at 1.3 volts (using skyn3t's Afterburner soft mod). The biggest issue here is that I believe the card throttles itself several times during the benchmark due to the 111% power limit (I am unable to get the 185% power limit advertised by the review sites) because I see it peaks out multiple times at over 120%.
skyn3t BIOS (based off of the standard Hawk BIOS, non-LN2)-
1205/7500 @ 1.2v
This is sort of the apples to apples comparison. The base clock was set to the same value (1205) and the memory the same (1875), I tried to apply the soft mod but it returned invalid for both commands and also the 12mV adjustment would not work either (even though I know it worked when I tried it last weekend), so the card was actually operating at 1.2 volts here. After the test was ran I could see that the card peaked out at 144% power so I knew that setting was working.
At this point I was impressed that the card a) operated at this frequency at 1.2v and b) posted basically the same score. While I forgot to write down the maximum clock the core reached during testing for the LN2 BIOS, I did notice the skyn3t BIOS did reach 1333 MHz, which means the card still is boosting to an extent.
From there I went on to see how far I could take the core on skyn3t's BIOS. I was able to run the test at 1225/7500 (max core 1346) @ 1.2v and achieved a 48.6 FPS / 2035 Score. The power limit was pushing 149% here, so there might possibly have been some throttling. Both tests at 1250 and 1240 crashed, so I just decided to call it quits there.
Conclusion: From what I can tell, skyn3t's modded BIOS is pretty solid (for the Hawk at least). For me, it seemed the primary benefit was the increased power limit, the serious decrease in required voltage to reach similar base clock speeds, and the the card's different handling of the boost feature (though not entirely sure if it was actually working). It really makes me wonder what a good tweaked Hawk LN2 BIOS, with the "standard" abilities of the GPU being able to overvolt to 1.3/1.4v through soft mod, memory capable of overvolting, and the power limit reaching 185%, could do.
If there's anyone out there that could mod the stock LN2 bios so that it's somehow hard-coded to allow a 185% power limit (or even 145%), I'd happily test it out for you just to see if throttling really is occurring when the limit is at 111%.
edit - went back and tested the skyn3t BIOS with its limit lowered to 111%. Can confirm my score dropped 50 points just form this single change alone, so that 111% limit might be holding back a lot of higher scores.Edited by btcpro - 10/15/13 at 5:01pm