Re: Mixing Graphics Cards 4650 and 5830?

You can only run 2 different cards if their in the same series, IE 5xxx or 6xxx
The problem is that every different series of card uses a different architecture, 40nm,50nm, ect and the drivers simply don't support 2 of those cards working together

Not true. My Windows 7 box is happily mining with a 4850 and a 5770.

^^^ how are you doing this?

Literally just plugged it in (the 5770) and let Windows install the driver for it. Both cards then showed up in GUIMiner. You might need dummy plugs (I have a monitor on each card, so YMMV). Make sure you have the latest driver from here - I'm almost certain that the newest ones will support 4xxx, 5xxx and 6xxx series cards.