Can this gigabyte 740g board do hybrid crossfire? Does it work on a hd3450 or hd3650? anyway if a hd 3450 hybrid crossfire will da speed be better than hd3650 256mb ddr3
No, it works on the 780G and 790GX. Only 2400 or 3400 cards (Most commonly the HD3450) will work. The HD3650 will not however with a HD3450 overclocked and using Hybrid Crossfire, your performance will probably still fall a little short of the HD3650 by itself.