Risers come tomorrow! I have 5 of these cards so far, i need one more to complete my rig. Definitely ran into the memory overheating issue, two of these cannot be plugged directly into the motherboard together. But spread out with risers and extra 120mm fans cooling them, they should work just fine. If they all end up producing the same hashrate, with 6 cards i should be around 614 MH @ about 1550 watts when completed. ::