I have an okay PC and I'm looking to upgrade my processor to a i5 4690k, here are the specs.

Processor: Intel Core 2 Quad Q8400 (2.66GHz)
Motherboard (I'm pretty sure I need to upgrade this): LENOVO (My CPU-ID is very vague about the model of it) and the chipset is a Q45/43.
GPU:(This isn't very important): Zotac NVIDIA GTX 750.
RAM: 8gb DDR3