Noob questions

[asbator]

I have two questions that i feel everybody knows answers and nobody even asks...

1. But how do i increase screen resolution in Teamviewer, VNC on Windows 7 with new digital output only graphic cards?
Casue i have only 640x480 resolution available without connected monitor.

2. How do i overclock ethereum miner?
If i put just +1 on memclock i get instant decrease of hashrate. I tried that on 7970, 295x2 and rx 470. I can only overclock gtx 1070 to nice juicy 30 mhs.

[asbator]

I pissed off and went up from 7000 Mhz to 7800 MHz and computer just crashed. Max mhash was still lower than stock.
But guys from http://cryptomining-blog.com/ somehow manage to OC every card they test. Do i need to mod bios or something?