Hi guys. I'm in the process of upgrading my PC. I have an HP 8000 SFF. My current processor is an Intel Core 2 Duo E8400 and I have a MSI Radeon HD 6450LP. I'm planning to upgrade to Core 2 Quad q9550 and Radeon HD 7750. Will it be a good combination? Are these 2 parts compatible to each other?