I agree with ol' Ham-n-Eggs.
Again: I'd just get 8GB memory: G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 1600
Newegg.com - G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7D-8GBXM and get the H80 or H100 cooler.
And I prefer ASUS over Gigabytel; check out this mobo: ASUS P8Z77-V PRO LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Newegg.com - ASUS P8Z77-V PRO LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
Again: I'd just get 8GB memory: G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 1600
Newegg.com - G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7D-8GBXM and get the H80 or H100 cooler.
And I prefer ASUS over Gigabytel; check out this mobo: ASUS P8Z77-V PRO LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Newegg.com - ASUS P8Z77-V PRO LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard