[ISSUE] ASIO Spikes in Cubase Pro 8.

I have Cubase Pro 8 and experience a lot of ASIO spikes. Very frustrating experience. I use Vienna Ensemble Pro with it. Any suggestions? My computer is fairy powerful: A dual Xeon @3.1Ghz with 64 GB of RAM on a Windows 7 machine.

Thank you,

-Nektarios