What is Ghz and Core? what affect does it have on computer performance??

[Trong Dinh]

im having a hard time trying to understand what does ghz and core does to computer.
This is the build that im about to build but i am debating if i should go with AMD FX-8350 4.0GHz 8-Core Processor or AMD FX-6300 3.5GHz (4.1GHz Turbo) Six-Core
Obviously the fx 8350 is better but i was wondering if the 3.5 ghz with 6 core still give out a good performance
Thank You <3
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-8350 4.0GHz 8-Core Processor ($199.99 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: ASRock 970 EXTREME4 ATX AM3+ Motherboard ($99.99 @ Newegg)
Memory: G.Skill Sniper 8GB (2 x 4GB) DDR3-1600 Memory ($79.99 @ Newegg)
Storage: Kingston SSDNow V300 Series 120GB 2.5" Solid State Disk ($89.98 @ OutletPC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.65 @ OutletPC)
Video Card: Sapphire Radeon HD 7870 GHz Edition 2GB Video Card ($169.99 @ Newegg)
Power Supply: Corsair CX 600W 80 PLUS Bronze Certified ATX12V Power Supply ($54.99 @ Microcenter)
Total: $755.56
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-06 04:58 EST-0500)

 

[allanitomwesh]

more cores share more tasks and finish faster. Higher ghz means it is calculating faster,but also uses more power as a result. You should determine whether you need the more powerful cpu,for the tasks you will do with your pc

 

[Trong Dinh]

so lets say if im only planning to use this comp for normal video/photo editting, web browsing, a lil gaming would a 6 core 3.5 ghz cpu still get the job done.. Run smooth..??

 

[allanitomwesh]

Yep,you'll only see video editing take a shorter time with the 8 core processor,otherwise it is all pretty similar.