GV-N630-2GI flashing

[soulreaper59]

Hello everyone. Need a lil bit of help with choosing the right firmware version for my GT630 (MICRON Memory).
I've noticed recently that a more recent firmware available for my card:
http://www.gigabyte.com/products/product-page.aspx?pid=4217#bios
My current one is F21 70.08.AA.00.00 and I'm confused which one to flash - F61 or F91?
Thanks in advance.

[akeapob]

I read the posts you easy to understand.