ATI Radeon™ HD 4890 System Requirements
PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard 500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode)
Certified power supplies are recommended. Refer to http://ati.amd.com/certifiedPSU for a list of Certified products
Minimum 1GB of system memory
Installation software requires CD-ROM drive
DVD playback requires DVD drive
Blu-ray™ playback requires Blu-ray drive
For a complete ATI CrossFireX™ system, a second ATI Radeon™ HD 4890 graphics card, an ATI CrossFireX Ready motherboard and one ATI CrossFireX Bridge Interconnect cable per graphics card (included) are required
The recommended PSU is for the entire system. If I were u I will not take the risk.
true except with the exception of seasonic none of those companies actually make their own PSU's. Most of the best brands have seasonic or cwt make their PSU's.
Enermax is a great manufacturer which has always made its own PSUs, although lately there are rumors that some other manufacturer is also producing Enermax units, but nobody knows who... Do you have any information about this matter?