The AMD X2 dualcore CPUs work great on the MSI K8N Neo4 Platinum but you need to use a beta BIOS. The first production BIOS that will work properly is the 1.5. This is for the MS-7125, not the SLI or Diamond.
MSI asked me not to post a link, but if you have this board and want to test the X2's in it PM me and I'll email it to you.