depends what its in the turion is a mobile processor so if ur gettin a laptop get the turion, if ur gettin a desktop get the athlon

NO

One can purchase an AMD Turion X2 from various websites like Amazon or eBay. One could also visit a local hardware store and ask if they have an AMD Turion X2 for sale.

The speed varies by the exact model. Go to the AMD website at http://www.AMD.com to get exact specifications.

No. The eMachines e627 will only physically accept an S1 socket processor. The Athlon X2 is an AM2 socket processor. You will need to go with an AMD Turion X2. And even then some Turion X2 processors may not be supported by the BIOS. The AMD Turion X2 TL-50 should be supported and should be free of heat issues as the dual core version of this laptop was shipped with this processor. I have read of users successfully upgrading to the AMD Turion X2 TL-58 and TL-64 without issue. However, that is not first hand knowledge on my part. I have the same laptop with the single core TL-20 and am about to upgrade to the TL-64.