So i finally had the chance to pop in the L5639 last night and tweak the OC. Max BCLK was 200. Not sure if I can go higher if i got faster RAM. The chip throttles up and down but seemed to settle at the Cinebench score listed below. Previous 920 chip is benched as well.
Did see a modest bump...
I see ibuypower is using a 92mm cooler in their new LAN Warrior II. Curious if it is the Asetek model mentioned here in this thread.
http://www.anandtech.com/show/4248/ibuypower-lan-warrior-geforce-gtx-590-microatx/4