Questions PSU wattage

[Frootism]

CPU: Intel Core i5-2500K 3.3GHz Quad-Core Processor
Motherboard: ASRock Z68 Extreme3 Gen3 ATX LGA1155 Motherboard
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1333 Memory
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive
Video Card: Sapphire 11199-00-20G HD7870 2GB GDDR5 Graphics Card
Case: Cooler Master CM Storm Enforcer
Power Supply: OCZ 550W ATX12V Power Supply
Optical Drive: Sony DDU1681S-0B DVD/CD Drive
Operating System: Microsoft Windows 7 Home Premium SP1 (64-bit)
CPU Cooler: 212 Hyper evo
This is the build i will get betting soon. I may or may overclock the 2500k to around 4ghz in the future.

Is my current PSU Good enough if i do overclock? (Also do OCZ make good psu's?)
IF i overclock my gpu, will i need even more PSU Wattage?

 

[Gallarian]

OCZ are one of the 'trusted' PSU companies, you should be fine with one of theirs.

To anwswer your overclock question - yes, more power is used if you OC your CPU/GPU, but as ct1615 has said, your 550watt will be sufficient.