Video capture card help

I was looking at buying an AVerMedia C985 Live Gamer HD 1080p capture card (goo.gl/tpsq8X). However I have a small problem;
can I play pc games at >1080p AND still have the card record 1080p? (e.g. so the video card outputs 2560x1600 to my monitor but capture quality is 1080p)
Is it possible with this card? if so how would i do so? If not could you recommend something else hardware based to suit my needs?

thanks in advance for any help.

You will probably be better off going over to avermedia's forum.

http://forum.avermedia.com/index.php?forums/live-gamer-hd-c985.6/

thanks, didnt realise they had one.