I managed to get my X5650 up to 4.3 GHz stable but I have to turn off all the power saving features to do it and that means it uses nearly 250 W when idle, which is just ludicrous. I actually bought an X5675 the other day so will try that tonight. I highly doubt the outlay for any new system right now would be worth it for me, compared to upgrading the GPU (if I felt the need to). Hopefully Zen 2 and DDR4 prices dropping will change that but we'll see.