Is this ok
4x S3+ OC'd
You need to get the notion that you need 4 connectors populated to power an overclocked S3+ out of your mind.
I'll do some maths for you to judge what you need.
Each 6 pin PCI-e connector, fully populated with PROPER 16AWG cables carries 7.5A * 3 = 22.5A which equates to 270 Watts @ 12V
That is enough to power a board in an overclocked S3+ (just one socket!), so for a 1200W PSU, you can safely power 2 S3+'s overclocked. Having said that, a single S3+ will not draw that much power, so a 1000W PSU can safely power 2 overclocked S3+'s.
Depending on how much power is available on each rail of your PSU, one 6 pin PCI-e socket should be adequate per S3+ board (making it 2 for the rig), but if you chose to populate all four, go ahead. For the cost and headache of an off the shelf PSU, I'd recomend a server PSU which are fare more efficient and robust than their desktop counterparts (and cost next to nothing, again compared to their desktop counterparts!)
Yeah I've been looking at the Server PSU's and there dirt cheap, only problem is I cant find any breakout boards in the UK.
Also I understand the concept of only requiring 2 pair device but that using 16awg, just looking at my Cooler master VGA cables and they say 18awg.
So in theory its not the device that requires the extra power, its the quality of cables used.
