Anyone tried to mine using different VGA card in the same rig?

These days the rig always hangs, especially when I surf internet and watch online movies. These two GTX 1070 is in different memory one is 1784 Mhz, the other is 1594 Mhz.

Is it due to different memory or the motherboard has been burnt?

you van do it I tun a gtx 960 and a gtx 1080 in the same rig.

first question here is, why are surfing and watching movies on your rig?

This is home pc. To make full use of it, adding another VGA card.

Just found out one of the risers has been burnt. It may be due to different base memories for these two cards.