Problem Overclocking after adding card

Hi there,

I have a setup consisting of a Fury pro, an RX480 8gb and an RX 470 4gb.

Before I added the 470 I could run the 480 memory at 2550mhz no problem at all and get 27/28mhs. Now that the 470 is in, If i so much as look at the memory controls it crashes with BSOD.

I have a 750w psu. The Fury is underclocked and total system power is draw at the wall is a little over 500w. It will be more when I overclock the 480 but I still have plenty of headroom.


Can someone suggest why this is happening?

Thanks.