Got it off Craigslist. It came with an aftermarket heatsink -> http://www.newegg.com/Product/Product.aspx?Item=N82E16835186046

it runs pretty well... I think. Getting an average of 326 M/hash using cgminer.

I am not sure if the previous owner installed the heatsink correctly because GPUz is reporting high temps on GPU #2 and GPU #3

Should I redo it?

Also, on cgminer it seems like the "--gpu-engine" AND "--gpu-memclock" flags aren't being applied. No matter what I change them to GPUz reports 775/1125 for speeds.

Anyone know how to fix this or if I am doing something wrong?