Which is the latest BIOS among these

F4 is the oldest - F23 is based off the latest Nvidia BIOS.

However, like ur6 said, this is the BIOS, not drivers. If you don't know what you're doing and aren't intending to flash the BIOS, don't mess with it - you can brick your card.

You sure you're not looking for drivers?
 
Considering that you said 'driver' in your original post, and that not many people mess with their graphics card BIOS, I wouldn't really consider it obvious that that's what you're looking for.

No need to snap at us for trying to make sure you don't do something by accident that could turn your graphics card into a brick.

And yes, it's a little confusing, but as we said, the F23 is the newest revision, as it's based off the newest nvidia bios.
 
Also F23 is for Hynix memory and F12 for Samsung memory. how do i know which memory is there in GV-N660OC-2GD?

This review say samsung? But can another card contain Hynix?


www.tchpowerup.com/reviews/Gigabyte/GTX_660_OC/4.htmle