I have recently purchased a Crossfire motherboard and put in 1 graphics card which is Gigabyte GeForce 9400GT 512MB PCI-Express 2.0 x16 DVI. This runs fine but i want more as i have a crossfire board with a spare graphics slot available. I was wondering if i put in another graphics card in would it need to be the same to run at a better quality or cud i put [Gigabyte GeForce 9400GT 1GB PCI-Express 2.0 x16 DVI (OverClocked)] in the spare slot to have 1.5gb of graphics which would make it alot better? I have been told if the graphics cards are not the same it runs at the slowest one and therefor the second one is a complete waste of money. But because they are the same graphics card just different sizes is this an upgrade?
Thanks for reading and I would really appriciate your help.