Opty 165 No Lid in Processors, Motherboards and Memory Posted October 14, 2007 I know that the bolt through water blocks are the best but sometimes you have to work with what you have. I waited probably a year after everyone else to cut my lid off. It got me to 3 ghz. anyway. It was very easy. I have pics here. Bottom of page. http://www.flickr.com/photos/edjahman/page12/ A disposable razor is the way to go.