This is the stock vbios the card ships with on the "air" bios position switch

Boost on most cards should be around 1430mhz at full 3d loading. There are no issues with booting/drivers at default voltage without evbot or dips using default bios. Some cards can OC to 1600mhz without yet making any voltage adjustments on card using this one, max OC at def voltage also depends on gpu though: DOWNLOAD.

Update 03-11-2015

Here is a new bios based on previous Kpex2c bios. This version should help anyone having driver issues when booting into windows without evbot. Also, this bios has the ability to run reduced power state at idle if not k-boost enabled. For best performance and scores, enable k-boost. You should see the highest clocks without making any adjustments to core voltage on this bios. Memory can overclock regardless of k-boost on/off now. LN2 clocks are verified up to 2200 on capable gpus: DOWNLOAD.