Fits without any issues.
I'm running an SLK-900U with a Panaflow 92mm L1A @ 12V (43cfm or so).
Idle: 25C - 100% Load for several hours: 41C
Let me know what temps yours reads out, I can't decide if mine are being reported really low or not, I suspect they might be as I only have one 120mm case fan for exhaust (Antec Sonata case).
The temps are the same if I'm at 2600 or running 3300 (both at stock 1.5V, but the P4P800 overvolts to 1.54 or so).