I think youd be hard pressed to run 3.6ns ddr at 800mhz
if you have a close look the article says 316/600 which is about what youd get from 3.6ns also there would be a bigger jump in 3dmarks. youd need 2-2.5ns DDR to get 800mhz.

My 4200 does 316/613 with 3.3ns DDR and gets about 10,500 3dmarks
I have taken out the blanking plates either side of the AGP slot
with a 120mm case fan blowing air onto the card. Cold air blows across the card and out of the empty slots (quite a wind!). The otes would only stop the hot air from the video card reaching the cpu. It wouldnt help overclocking.[/b]

The article doesnt say 316/600 it says 315/600 sorry