Hello,
All AMD Turion processors (single core) use Socket 754 (ML and MT series), apart from one model which uses Socket S1, and that's the AMD Turion MK-36.
As already posted, all AMD Turion X2 (dual core) processors use Socket S1. So, you can't put an AMD Turion X2 (dual core) processor in your system I'm afraid. You'll either have to settle with what you've got, or you could upgrade to a higher clocked single core Turion.