Crazy fun!! - Haha, what more is there to say?!
Ok, so it would have been nice if all four cards had performed as well as the best card, but that is something you have to be prepared for, particularly when going to the extremes.
But I am not complaining; P53k with 5870's in 3D Mark Vantage is nothing to sneeze at and watching some of the peak frame rates during the benchmarks, you can't help but smile.
Benching five pots with liquid nitrogen on your own is not for the faint hearted. Great fun? Yes, but also very stressful. But as they say, if it was easy, everyone would be doing it. But if the mood takes you to push four already powerful cards further and you have access to the equipment needed, I highly recommend the experience.
I would like to thank MSI for all their assistance in bringing this article to you. Another big thanks goes to Shamino for his fantastic guide on "Souping Up your VGAs". His original thread can be found here.