But like I said, you're basically replacing an old ass CPU with another one. If you're paying retail for this upgrade, don't do it. 20 bucks on ebay, sure what the heck?
As I mentioned in his other post, the 3.4 GHz processor is a Pentium 4. The E5300 is nearly, and in some cases more than, twice as fast as the one he got. Even if its $20 on eBay, he would do himself a massive disservice to throw that processor in there.