H80 is a low end "water" cooling for SB-E. I couldn't get a 3930K or 3960X over 4.5 stable with a H100 which is a little better than H80. And by stability I mean at least 8 hours of Prime95 27.7. I was already too close to temperature throttling limit. With a golden chip, better results could be achieved, but 4.9 @ 1.5 V doesn't sound too promising.

Btw wrong subforum.