Yip, unfortunately can only pull 2.4ghz on the NB i daresay cause of that. I have a hyper 212 evo, with a 10cm case fan, and 10cm psu fan all in optimal position to cool the VRM's. debating rangi'ing up some heatfinks to put on them loosely, but at this stage, if my CPU's very comfortable at 4ghz, I'm happy.
I wish they had the ud3, but they didn't sadly. I do like the other features, like the usb 3.0, (as I said) dual bios and easy unlock features the 970 affords.