Originally Posted by miki117
Well what would be the difference between a single 12v rail with 40A vs a dual 12v rail with 20A each? Would the 20A on each 12v rail stack? (20A+20A = 40A?) Or would there be some kind of degradation when adding up those 2 rails?
Any benefits from either one?
I'm planning on buying the FSP Hexa 500w tomorrow, because my backup power supply (250w LOL) ain't gonna make it any longer. It has a dual 12v rail with 18A on each. Despite my previous thread favoring the Antec Neo 520w with a single 12v rail, about 40a I think, I would need to buy the FSP Hexa psu, since it is cheaper. But the dual/single railed 12v thing is bugging me.
Here's my specs by the way.
CPU: FX4100 Zambezi 3.6GHz
GPU: GTX285 (currently on 8600GT)
RAM: 8GB (2x4) Kingston 1333 DDR3
Mobo: Asrock N68C GS-FX
Got 2 HDDs(one only used at this time)
1DVD RW drive(disconnected)
7 120mm case fans, 1 with LED (4 being used, including the LED)
1 Vortex + heat sink (92mm fan)
I've read somewhere that dual 12v 18A rails are enough for the gtx285 and the CPU is really not a problem.
So, would it be 'okay' to buy the FSP Hexa psu for this system? Or would it be better to just pray that the 250w power supply holds on for another 15 days for me to buy the Antec Neo or better?
Unfortunately, they don't stack. So, having two 20A rails doesn't make 40A, nor does having two 18A rails make 36A.
I am having a hard time finding out what the 500W FSP HEXA's +12V capacity is, but from the looks of things, I am willing to bet that it's much less than 40A. Now, according to the page linked below, it's 408W which is 34A:
That's not good, but it's not necessarily bad. However, the quality of the unit is more important. I'm willing to bet that the 520W Antec NEO ECO is significantly better than this FSP Hexa unit. I mean, I took at look at FSP's product page for this PSU, and it doesn't leave me with the impression that this is a quality-made power supply. I'm also having a hard time learning about this PSU from my Google searches which leaves me with the same bad impression.
I don't know what to recommend here, but I would try to hold out for a better PSU by minimizing your system as much as possible until then.