What is the power consumption?
I could fit 2 of them easily with a 500W Cooler Master PSU. Don't know the exact power consumption though.
The rest of the system is:
Gigabyte GA-970A-D3 Motherboard(only got 4 PCI-e)
OCZ Vertex 3 60GB
a laptop HDD(don't know the exact model but it's Western Digital)
AMD Phenom II x6 1100T Black Edition
4 of those power hungry LED fans
EDIT: And BTW they require a 6-pin PCI-e power connector for each card.