GTS 450 GV-N450 0C-1GI I wanted more

I’ve purchased a Gigabyte labelled GTS 450 GV-N450 0C-1GI my original intention was to buy the Gigabyte GVN26OC896I GeForce GTX 260 however prior to purchase I was advised by my supplier that it was doubtful & somewhat borderline that my current PSU would be able to support the Gigabyte 460GTS & I didn't want to spend the money to replace it at this time, therefore on the spur of the moment I decided to buy the Gigabyte GTS 450 GTS GV-N450 0C-1GI instead.

Oops   I’ve most recently found that Gigabyte also produces an extremely similar but faster card to my current card (GTS 450 GV-N450 0C-1GI) namely the Gigabyte GV-N450 OC2-1GI

From what I’ve now found on the net the two cards look identical , could you please advise if this is so & if yes I assuming that a new BIOS must be required, again if this is the case could you please advise where I could obtain this later BIOS firmware.

Thanking you in anticipation of your reply

Thanks Megan 8

PS I see this is on You tube http://www.youtube.com/watch?v=Odspx2I2zU4 but wonder if this info can be trusted, especially the source of the updated BIOS What do you experts think?