Buying a Mobo/RAM/CPU bundle and Graphics card Would a Sapphire Radeon HD 7870 OC work well with a Asus P8Z68-V LX (Intel i5 2500k included)? Are there any bottlenecks or would the Mobo/CPU work well with the graphics card? While I'm at it, (about the Mobo/CPU) Is this a good bundle to buy?: Intel i5 2500k @ 4.4GHz, Asus P8Z68-V LX , 8GB Corsair 1600MHZ DDR3. I noticed that the Asus Mobo has a PCI Express 2.0 slot but the graphics card is PCI Express 3.0. Will this be an issue??