I've seen an article using a Peltier similar to what you describe, but I don't have the link. The article used a Tbird and a PIII and compared results. To make it short, the peltier was very good for helping the PIII, but it only acheived a measly 20-30mhz more than an Alpha 6035 HS/Fan on the Tbird. If you already have the peltier and can't return it, use it. If you don't have it yet, save your money and get an Alpha 6035.