Don't remember this from earlier, but my mouse is lagging when I refresh specific websites in Chrome and Firefox. I can't observe such lags with Internet Explorer.
I tested with AIDA64 and sometimes noticed very little and short lags.
Hardware And Software Information:
DELL Latitude E6420
Windows 7 64-Bit Enterprise
8GB of RAM
Razer DeathAdder Black Edition mouse
Driver version: 1.02