Ok, I'm looking to get the Titan Nero prebuilt from OCUK, I was going to build a pc for my brother myself but this seems such good value I won't bother. 
I do however have a few questions; The first being what exact graphics card is installed? and would it be possible to have the slightly better Corsair Dominator 4GB DDR2 ram kit instead of what comes default?
Please move if this is in the wrong section, I couldn't find one specific to prebuilts.
Thanks.

I do however have a few questions; The first being what exact graphics card is installed? and would it be possible to have the slightly better Corsair Dominator 4GB DDR2 ram kit instead of what comes default?
Please move if this is in the wrong section, I couldn't find one specific to prebuilts.
Thanks.