Hello guys, I have a plan to upgrade my gaming PC. I saw that the prices of AMD cards dropped so i was thinking,should i buy another Ati Radeon HD7970. My current system: CPU-i7-3770 3.4 GHz GPU- Sapphire Dual-x HD 7970 RAM-Patriot Viper 2133 MHz Motherboard- Gigabyte Z77-DS3H SSD-Samsung 840 Series 120 GB(boot drive) HDD-1 TB Western Digital Blue 64 MB CASE- Coolermaster HAF 922 Also i was thinking about a CPU cooler. I was in my local computer shop and they said that i should get the Coolermaster Seidon 240, is it a good cpu cooler? Thanks.