IMO i dont rate BFG, never heard of in UK till 6800 range and read lots of probs and lack of paste under cooler that peeps removed to stick on after market ones, i will stick to Chaintech, the Asians make good kit.
Also claiming 10% oc on core is misleading as nvidia just said a ultra has to ahve at least 400/1000, not has to have or any more is a suto o/c model, the Nvidia UK PR Manager also added what we read on web about it was to fool ATI with the speeds then later release 400-425/1100 models.
There are a few good manus out there selling 425/1100 ultras not marking them as o/c 10% cause they really arent.
To top it up Nvidia also added a Ultra Extreme would have be at least 450/1200, which is easy to reach on most ultra with no bios mods, i go beyond that anyhow not got clue if all can.