post #21 of 21
The 850W Silverstone has indeed four 12V rails of 18A each, and can deliver a max load of 70A total over those rails.

The Galaxy has five 12V rails indeed, 17A each with a total max load of 68A (850W version) or 75A (1000W version).

The issue is the way how those rails are distributed. The Galaxy has two rails (12V1 and 12V2) dedicated to the CPU(s) only. For both versions, these two rails have a combined max load of 34A, leaving 34A (850W version) or 41A (1000W version) for everything else across the three remaining 12V rails. This is nice for multi-CPU systems, but for most of us, one rail (and thus 17A) remains unused. As far I know the sets of 12V rails are strictly separated.

For the Silverstone, The distribution is as follows:
12V1: 8 pin mobo connector
12V2: SATA, 8-pin mobo connector (unused when you use only the 4-pin connector), PCI-E #3
12V3: 24-pin connector, molex, floppy, EPS12V 6-pin connector (not often used), PCI-E #4
12V4: PCI-E #1 & #2

Thus, a pretty well balanced distribution. Plus, about 17.5A (70/4) is used by th CPU rail (12V1), and the remaining current, which is 52.5A is available for all else. Quite a bit more than the Galaxy.

Finally, the Silverstone has proven to be worthy (ask K|ngP|n), and is cheaper than the Galaxy. Why prefer the Galaxy over the Silverstone?
    
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CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply