If you've done what I did and upgraded your computer to something twice as fast, you may have noticed that RAR files will always be limited by your hard drive speed. My proc doesn't even scale above 1.8GHz (It's a firstname.lastname@example.org) when extracting RAR files. Why? WinRAR copies files to a temp folder, you can actually find it right there in the options. Now, taking hard drive geography and platters into mind, you can realize that the drive is doing a lot of extra needless work, copying from wherever your data is to that temp folder and then back to where the data will end up. For most of us, this data ends right back up in the folder or a subfolder of the RAR files folder. The solution to the problem is so simple it's mind boggling. You just set the temp file field to blank and click OK. Done. I did this and noticed that it's like putting a performance camshaft in a motor; the RPMs are steady and the power band (extraction rate) is flat because you're working in just that one section/platter of the drive instead of having things copied over to your C drive and then back wherever they're going. Cheers.