NordicHardware just published a review of Hemlock and during testing we did some extreme overclocking on the card and to give it a bit of an "AMD" touch we used the complete Dragon platform.

Both the graphics card and CPU was LN2 cooled:
Radeon HD 5970 @ 975/1250 (-50C)
Phenom II X4 965 C3 @ 6GHz (-181C)

We where mostly after getting some nice frequencies but the 3DMark Vantage Extreme score was rather nice, for an AMD system that is.



Link: NordicHardware