Sapphire Radeon HD 7870 GHz Edition 2GB

Hi, so I've been looking into overclocking my CPU so recently added a cooling system to my build. However, I haven't looking into overclocking my 7870. First of all, here's my build (without the case, still looking into that):

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-2500K 3.3GHz Quad-Core Processor ($213.98 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler ($24.85 @ Amazon)
Motherboard: MSI B75MA-E33 Micro ATX LGA1155 Motherboard ($59.99 @ Amazon)
Memory: Mushkin Blackline 8GB (2 x 4GB) DDR3-1600 Memory ($35.57 @ NCIX US)
Storage: Seagate Barracuda 1.5TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ NCIX US)
Video Card: Sapphire Radeon HD 7870 GHz Edition 2GB Video Card ($194.99 @ Newegg)
Power Supply: Corsair Builder 500W 80 PLUS Bronze Certified ATX12V Power Supply ($39.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($16.99 @ Newegg)
Total: $656.35
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-01 12:16 EST-0500)

So would overclocking be possible and/or recommended with this build?