Did a bit of playing today.
It seems my second card wasn't powerful enough to handle PhysX on its own - it's faster in the Cryostasis benchmark with PhysX and graphics on the 285, rather than split between them. Not that bothered though, as it was mainly bought as a 3rd monitor output. Something else I can try tomorrow. It averaged 40fps at full detail and 1680x1050. I wasn't that impressed with the particle water though, it looks more like very low-friction slime.
It thoroughly spanks GTA IV - decent amount of detail (not enough texture memory for full detail though) and no slowdown at all. Checking the coretemp logs, it idles at around 33 - 34 degrees and no core went above 41 degrees C for an hour of me playing it, so I've got some decent headroom for seeing how far it'll overclock.
. It's held in with sticky-back velcro.
but can't help thinking that it looks like this one below...though i must say, the red inside and the black outside like you have done looks great, keep up the good work 
Mine's a beautiful deep crimson colour (my photos make it a bit too bright - it's darker in real ilife) on the inside and rear, but keeps the original anodised black colour on the outside, giving a brushed, satin finish. I've also had the grilles on the sides and top done in the crimson.
