Nice oc Demonic, I'm not so impressed with your ram though, the Gainward has 4ns ram and that is guaranteed to hit above 500mhz I think (can't remember the mhz for each ns, someone who can please state 'em), 540 doesn't seemlike that much for the ram. 260 for the core on the other hand is great.
I tried with my Blorb (Blue Orb) on the gpu of mine but it couldn't run faster than before, but when I took the Blorb off I noticed that the paste hadn't touched the core of the hsf at all, so I'm gonna lap the Blorb and try again, as it could cool it as good as stock with improper contact I think it'll go further when it touches the gpu properly. The ram on my card is 5ns which is why I'm so impressed with it hitting 530Mhz.