Are these parts compatible?

Are these Compatible Parts ? I'm on a mid-budget build here, and i want to know if these part compatible, or not. Also, would these parts be good for gaming? Thanks.

Specs:
GIGABYTE GA-B75M-D3V LGA 1155 Intel B75 SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard

Rosewill CHALLENGER Black Gaming ATX Mid Tower Computer Case

G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) Desktop Memory Model F3-

14900CL9D-8GBXL

EVGA 01G-P3-1556-KR GeForce GTX 550 Ti (Fermi) FPB 1GB 192-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support

Video Card

Rosewill Green Series RG630-S12 630W Power Supply

LG DVD Burner 24X DVD+R 8X DVD+RW 8X DVD+R DL

Seagate Barracuda Green ST2000DL003 2TB 5900 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive

Intel Core i3-3225 Ivy Bridge 3.3GHz LGA 1155 55W Dual-Core Desktop Processor Intel HD Graphics 4000 BX80637I33225\

Keyboard

HP Pavilion DV5-1000 DV5-1100 DV5-1200 Series Keyboard