I've been given another XFX Radeon 5770 off a friend who has upgraded his pc. I've just installed it but I'm now worried about power supply. I've got a modular Antec true power 650. Running an i5 system with 8gb ram and a asus xonar dg audio card drawing power as well. What I'm wondering is 1) will my psu handle both cards? 2) do I need to connect the second card power on the same 6 pin cable (I.e. The slave connection or whatever it's called) or do I need to connect another 6 pin cable to my modular psu and juice the second card with that.? Responses ASAP would be great. Thanks in advance.