MSI Radeon HD 5870 Lightning Graphics Card Review

"When looking at the PCB design, it becomes clear that MSI has gone long ways to improve the AMD reference design for extra overclocking potential. The included SSC coils work without emitting any coil noise, and the added number of PWM phases will help in situations that require large amounts of power fed to the GPU. But it seems to me that during normal use and during overclocking with the stock cooler, these features seem to make little difference.

Out of the box, the card comes with a fairly small overclock which only adds about 2-3% to the card's performance compared to the reference card. I am also puzzled why MSI did not increase the memory clock - there certainly seems to be enough headroom to do so."