Also remember that the Corsair CX750 only has 2 x pci-e plugs and the S5 needs 4.
In all honesty you're better off going for a branded psu with minimum 4 pci-e connections or a server supply with the same.
If you're thinking about getting another S5 in the future then the EVGA Supernova 1300 or 1600 look just about perfect for the job as philipma1957 mentioned a few posts back as they both have 8 pci-e connectors.
I've seen other people mention this here that the CX750 only has 2 pci-e plugs, this is wrong. As per Corsair's site it has 4 plugs - http://www.corsair.com/en/cx-series-cx750m-modular-atx-power-supply-750-watt-80-plus-bronze-certified-modular-psuIn all honesty you're better off going for a branded psu with minimum 4 pci-e connections or a server supply with the same.
If you're thinking about getting another S5 in the future then the EVGA Supernova 1300 or 1600 look just about perfect for the job as philipma1957 mentioned a few posts back as they both have 8 pci-e connectors.
I also don't like using Dogie's guide. Reason being he gives his rating but doesn't state why for example EVGA Supernova 1300W gets 93.0 rating, while the exact same model in 1100W version gets 78.0 or something similar
.....No explanation and it doesn't make sense. Also, he states the CX750 has 2 connectors, which is probably why people don't realise it has 4. One last comment, what constitutes a no-name PSU? Corsair/Thermaltake/Cougar/CoolerMaster/EVGA/Gigabyte , is it safe to say these aren't no-names?