When I first got my 1900+ she ran at close or higher than what yours is running and I knew OClocking her was going to push her even higher, so I decided to change my heatsink to one that I knew would cover whatever I wanted to do, I researched different OClocking sites reading reviews and trying to figure out what in the world to do, I don't remember where, but I read an article written by a guy praising the heatsink Swiftek 462, because his cooling fan had failed and the heatsink itself had saved his machine, I bought the Swiftek 462 myself and installed it on my machine, using the lower option fan my temp under extreme processing load doesn't exceed 38c, that is an expensive option and alternative and if you go with the high speed Delta fan you can cut your temps even lower, however sound is something you have to put up with its a lot louder than the average computer. I put a chunk of money into building my computer, I wanted a heatsink and fan so I could OC without worrying and I found it Swiftek 462, You get what you pay for. Oh don't take the little pads off the processor, but do use a good thermal compound. If your 1900+ is green don't worry with the shims, if its brown you may consider using the shim.