i3 2105 with HD3000 can work perfect now in snow leopard, but how to get it work? please follow me(here we use ga-h67ma-ud2h-b3).
1. set USB3.0 controller as disabled and HPET as 64bit mode.
2. install the kexts you need to download
http://u.115.com/file/e6y3gvn2 kexts for HD3000
http://u.115.com/file/dn6drtdu DSDT.AML+ EXTRA