Hashcat vs TeamViewer

Hi guys,
I just foun some strange "feature" of hashcat + teamviewer. Working on DES hash with speed arount 2000MH/s but when use my phone and connect to rig via teamviewer speed goes to 2800 MH/s. Ofc temp also goes up and if i dont kill session hashcat abort due temp limit.
Any ide why ??
Windows 7 user