This PSU good enough for my specs

I plan on getting this PSU: Corsair - Enthusiast Series 650-Watt ATX/EPS CPU Power Supply

- Cooler Master HAF 912 Mid-Tower Gaming Case w/ Adjustable HDD Cage
- Intel® Core™ i5-2500K 3.30 GHz 6M Intel Smart Cache LGA1155
- Corsair Hydro Series H60 High Performance Liquid Cooling System 120MM Radiator & Fan
- 1TB SATA-III 6.0Gb/s 32MB Cache 7200RPM HDD
- 8GB (2GBx4) DDR3/1333MHz Dual Channel Memory
- [CrossFireX] Asus P8Z68-V LX Intel Z68 Chipset DDR3 ATX Mainboard LucidLogix Virtu and Intel Smart Response Technology & 7.1 HD Audio, GbLAN, USB3.0, 2x SATA-III RAID,2 3 PCIe Gen2, 2 PCIe X1 & 2 3CI
- AMD Radeon HD 6870 1GB GDDR5

This PSU Good Enough?

Yes that PSU will run 6870 Crossfire if you decide to upgrade later.

For a system using a single Radeon HD 6870 graphics card AMD specifies a minimum of a 500 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 30 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

The Corsair Enthusiast Series TX650 V2 (CMPSU-650TXV2), with its +12 Volt continuous current rating of 53 Amps and two (6+2)-pin PCI Express supplementary power connectors, is sufficient to power your system configuration. There is ample reserve capacity to handle any overclocking of the CPU and GPU you may want to perform.