updated sys clk and able to oc to 614mhz, unfortunately, performance doesnt scale despite the almost 2x gpu clocks. I'm getting the same dips to the 40s fps but lots of areas are close to stable 60fps.
I didn't overclock cpu (and ram) as it doesnt seem to be hitting max utilization though i'm sure it would help
all in all, pretty happy with 720p (there doesnt seem to be any AA in the game) with the almost 60fps performance