Parts Advice for Gaming Build

[clichty]

I want a build that will play new games on high/ultra at 1920x1080.

PARTS I'M BUYING:

Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K

ASRock Z77 Extreme6 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

QUESTIONS:

1. Will this cpu and mobo work well together and get full function out of each other?

2. What RAM should I get with this system. ddr3 1600? dd3 2400? How much of a difference in speed it?

3. I'd like to get GSKILL 2x4gb=8gb of ram. Is that enough to play 1920x1080 on ultra?


CURRENT COMPUTER:

Intel Core2 Duo CPU E6750 @ 2.66Ghz

NVidia Geforce 8800 GTX 768mb GPU

G.SKILL 2GB (2 x 1GB) DDR2 800 (PC2 6400) Dual Channel Kit

Corsair HX 620W Modular Power Supply

EVGA NVidia nForce 680i SLI Motherboard

Seagate Barracuda 7200.10 500 GB 3 GB/s HDD

 

[tiny voices]

Get 8gb 1600mhz 2x4gb (games only use 4gb)
The CPU and motherboard will work fine.
What GPU will you be using?

 

[g-unit1111]

1. Yes

2. DDR3, 1.5V, 1600MHz, dual channel. Voltage is critical.

3. Get G.Skill Ares with the low profile heat spreaders..