This mobo/cpu/ram compatible?

Are these parts compatible?

Mobo: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...
GIGABYTE GA-MA785GM-US2H AM3/AM2+/AM2 AMD 785G HDMI Micro ATX AMD Motherboard

CPU: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...
AMD Phenom II X2 550 Black Edition Callisto 3.1GHz 2 x 512KB L2 Cache 6MB L3 Cache Socket AM3 80W Dual-Core Desktop Processor HDZ550WFK2DGI - OEM

RAM: http://www.newegg.ca/Product/Product.aspx?Item=N82E1682...
Kingston 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300) Dual Channel Kit Desktop Memory Model KVR667D2N5K2/4G

I want to double check. Mobo is AM3 and the cpu is AM3 as well. I think it should fit. This should fit in an Antec 300 right?

Thanks!