Overclocking the Asus EN7950GX2
As we neared the end of our testing, we spent a little time overclocking the Asus EN7950GX2 using the clock frequency slider available within NVIDIA's Forceware drivers, after enabling the "Coolbits" registry tweak. To find the card's peak core and memory frequencies, we slowly raised their respective sliders until we begun to see visual artifacts on-screen while running a game or benchmark. Please note that the GX2's GPUs have to be overclocked in tandem, and not individually. The peak clock speed attainable by the "slower" of the two GPUs will determine the maximum overclock.
This test is important from the perspective of comparing Asus' EN7950GX2 to XFX's card, which come overclocked out of the box at 570MHz core and 775MHz on its memory interface. Though Asus' card comes factory set at reference GeForce 7950 GX2 speeds, it certainly has plenty of headroom for overclocking. In fact, it overclocked right up to the levels we saw from our overclocking efforts with the XFX card in our launch article. As we noted before however, these cards get really hot under pressure and we wouldn't recommend pushing the card past the 570MHz range at its core just to get a couple more fps. The jump from stock speed to 570/775 is certainly worth it though, while gaming with F.E.A.R.