You got 4.4Ghz on all 8 cores at the same time? I highly doubt it. Use HWiNFO for monitoring, HWMonitor reports some incorrect values.
Here's a quick grab, I just reset the min/max then ran a few apps to see and a few cores hit 4.4GHz.
Is HWMonitor useless, should I uninstall and use HWinfo instead?

