I want to build my own computer, but I'm a complete beginner. I have no experience with computers whatsoever. I already looked up the parts I want online, and I want to know if they are good for gaming, if they are compatible with each other, if there's anything that can be improved, and if there's anything that's missing.
Processor: Intel Core i5-4570 Haswell 3.2GHz LGA 1150 84W Quad-Core Desktop Processor Intel HD Graphics BX80646I54570
Motherboard: ASRock Fatal1ty Z87 Killer LGA 1150 Intel Z87 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
Case: Cooler Master HAF XM ATX Mid Tower Case Black 3X5.25 8X3.5INT Red LED Light *No PSU*
RAM: Crucial Ballistix Sport 8GB 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model BLS8G3D1609DS1S00
Graphics Card: ASUS GTX780-DC2OC-3GD5 GeForce GTX 780 3GB 384-Bit GDDR5 PCI Express 3.0 HDCP Ready SLI Support Video Card
Hard Drive: Seagate Barracuda ST2000DM001 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
Solid State Drive: SAMSUNG 840 EVO MZ-7TE250BW 2.5" 250GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)
Optical Drive: SAMSUNG Black 18X DVD-ROM 48X CD-ROM SATA DVD-ROM Drive Model SH-118BB
Power Supply Unit: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready
Cooling: CORSAIR Hydro Series H60 (CW-9060007-WW) High Performance Water / Liquid CPU Cooler. 120mm
Monitor: AOC e2752Vh 27" LED Monitor
Keyboard: Microsoft Sidewinder X6 Gaming Keyboard
Mouse: Microsoft SideWinder X3 Black 5 Buttons USB Wired Laser 2000 dpi Mouse
Headset: Turtle Beach PX22 amplified universal gaming headset for PS3, Xbox 360 and PC
OS: Microsoft Windows 7 Home Premium SP1 64-bit - OEM
Processor: Intel Core i5-4570 Haswell 3.2GHz LGA 1150 84W Quad-Core Desktop Processor Intel HD Graphics BX80646I54570
Motherboard: ASRock Fatal1ty Z87 Killer LGA 1150 Intel Z87 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
Case: Cooler Master HAF XM ATX Mid Tower Case Black 3X5.25 8X3.5INT Red LED Light *No PSU*
RAM: Crucial Ballistix Sport 8GB 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model BLS8G3D1609DS1S00
Graphics Card: ASUS GTX780-DC2OC-3GD5 GeForce GTX 780 3GB 384-Bit GDDR5 PCI Express 3.0 HDCP Ready SLI Support Video Card
Hard Drive: Seagate Barracuda ST2000DM001 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
Solid State Drive: SAMSUNG 840 EVO MZ-7TE250BW 2.5" 250GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)
Optical Drive: SAMSUNG Black 18X DVD-ROM 48X CD-ROM SATA DVD-ROM Drive Model SH-118BB
Power Supply Unit: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready
Cooling: CORSAIR Hydro Series H60 (CW-9060007-WW) High Performance Water / Liquid CPU Cooler. 120mm
Monitor: AOC e2752Vh 27" LED Monitor
Keyboard: Microsoft Sidewinder X6 Gaming Keyboard
Mouse: Microsoft SideWinder X3 Black 5 Buttons USB Wired Laser 2000 dpi Mouse
Headset: Turtle Beach PX22 amplified universal gaming headset for PS3, Xbox 360 and PC
OS: Microsoft Windows 7 Home Premium SP1 64-bit - OEM