In hindsight, probably not the best unit to have purchased. So, with the Sapphire 5850 Xtreme at $149, I was thinking of purchasing another 5850 in crossfire. The only catch being that I only have two pci-e slots. I was thinking of getting a pair of splitters and using that to power the cards since rail can carry 50A. However, I'd really prefer not to toast anything. Does anyone have experience with this?
For reference, I'm running the processor on 1.425v at 3.8ghz.
I think you would not see good results using a splitter and in my opinion you psu is not enough to hold out.
A second card requires you to add another 170 Watts. You need a 650+ Watt power supply unit if you use it in a high-end system. That power supply needs to have (in total accumulated) at least 55~60 Amps available on the +12 volts rails.
That 30 amp figure is recommended for a complete "typical" system.
A pair of 5850's draws less than 25 amps. Figure 10 amps for the CPU and that's 400 watts. The rest of the system will not pull more than 100 - 120 watts. A 650 watt PSU will provide sufficient power. I, however, would use a 750 watt PSU.
Davcon, 60 amps X 12 volts = 720 watts.
Having said that, the Antec would be a better choice, but Homestar already owns the Rosewill.
Keep in mind that Rosewill is a lot like CoolerMaster. They keep trying to build good PSU's but they are not quite there yet.