Heya peoples I've been looking at extreme cooling for a long time now, but money has always been an issue. Recently I've aquired 2 peltier units. a 245W Potted Peltier and a 437W Qmax Peltier. Any peltier above 80W will not work on air cooling. So I need to water cool it. I've previously had a gigabyte Watercooling kit and still have the parts around for it. I know that the parts are not upto dissappating over 200W of heat, but will work for a test. I have modified the origonal waterblock to suit the peltiers (http://mo-girks.com/gallery/main.php?g2_itemId=3235) and may still choose to use it to test with. I'm not sure how well it will handle > 200W (with the appropriate radiator/pump Doing a lot of research through many extreme cooling forums I've found that only one comercial waterblock is capable of handling the 437W peltier. So i decided to make my own. I've placed all the photos into my new modding Gallery. I've been modding for years, but only just finally uploaded my latest mod. Will upload more mods when I have time. I'm only going to post links to the pics so the page loads quicker. Creating the block: http://mo-girks.com/gallery/main.php?g2_itemId=3547 Here is the aluminium bar that I'm roughing the cooling plate, fins and upper case from. I've decided to go with Aluminium because we have the bar already, and copper is SOOOO expensive. http://mo-girks.com/gallery/main.php?g2_itemId=3557 Here are the 2 main pieces of the waterblock ready to be milled. The larger piece is the top of the waterblock, and the smaller will have the fins. http://mo-girks.com/gallery/main.php?g2_itemId=3467 Here is a test run on a scrap piece, trying out a new tool created to make groves for the fins. I've decided to set the fins at a 60 degree angle to encourage waterflow around them without creating dead spots where the water gets trapped. http://mo-girks.com/gallery/main.php?g2_itemId=3487 Here I've machined the "fin block" to a flat surface on both sides, all ready for the fins to be cut http://mo-girks.com/gallery/main.php?g2_itemId=3607 All the groves in one direction are cut, job rotated and ready to continue the diamond pattern. This takes an amazing amount of time, Soooo many cuts http://mo-girks.com/gallery/main.php?g2_itemId=3677 Here's the completed diamond pattern, and the job is positioned for a 6mm grove around the edge to be machined. as you can see on the clamp I had a slight miscalculation, when a clamp is done up one corner of the slide will always kick up, I didn’t take this into consideration when I machined the diamonds I'm glad it was a cheap clamp http://mo-girks.com/gallery/main.php?g2_itemId=3572 Completed grove around edge and removed some of the bent pins. I've competed the waterblock this evening. Uploading 200 mb of photos now and I'll update with the completed block tomorrow.