First we've got the ThinkComputers guys, who are giving away a trio of prizes from CoolerMaster. It's a forums-based contest with a 35-post minimum. Posting in the contest thread gets you one entry, while if you follow along with the CoolerMaster trivia throughout the contest, each correct answer will get you additional entries.

The Shrimpies have been appointed the task to send one Belgian overclocker (or team of two) to Amsterdam, Netherlands for the European MSI overclocking finals in August. Post your o/c'ing results in their forums in order to get into the pre-qualification round. The top three will get prizes, and the winner will get to represent at the finals.