Here's the result of my Haswell upgrade. A full upgrade at the cost of the CPU I replaced
This time the chipset was more important than the CPU for me, therefore Haswell > Ivy Bridge E.
Resulted in quite a nice MIN FPS gain in iRacing so I'm happy
I'm probably going to use the old 980X/X58 system as a dedicated Oculus Rift setup. Using the Rift on the Surround Screen system is a hassle. Just need to find a cheap but decent GPU.