Interested but need more info.
if these things will not come with PSU's will they allow regular ATX PSU's to be used or will it need to be specially made PSU's like the A2 used?
The A2 did not NEED a special PSU - I've got 2 of them running with Seasonic X-1250 standard ATX power supplies, one that came from Zoomhash with a 1300 watt gold PS in it that I don't remember the brand of and other folks have reported transplanting other standard ATX power supplies into them when the "included" PS died.
They would WORK with an EVGA 1300 G2 but those didn't fit into the case physically without major "too cramped" and "pinch the wires" issues.
X1250 is pretty close to SILENT running a A2 110Mhs Terminator at the max turbo mode and appx. 1200 watts draw from the wall - definitely can't hear it over the Deltas in the miner unless you put your ear RIGHT at the fan of the Seasonic.
I do note that Innosilicon is SPECIFYING a 1000 watt power supply, while the A2s shipped stock with an 1100, which strongly implies that the A4 is lower power usage all-up than the A2.
Using a 1600 watt PS should be a TOTAL WASTE of capasity and money (unless you already have it sitting around, of course).
The A2 does need a CPU style pin connector or you can plug in PCI connections with the last 2 pins flipped backwards. I have confirmed this with 2 of my A2 megas that I tried to put more efficient power supplies in. Perhaps yours are built differently? Mine are the Silver Models with 5 fans from Inno.
Agreed in regards to the A2 vs Seasonic noise level. The sound comments I made were in direction to the A4, which is supposed to be much more quiet than the A2 was. Since no one yet has an A4 to compare or has provided a comparison, not sure how loud the psu fan will be compared to the A4. I was simply stating that at near max load my AX1200i's are on and in a quiet room, you can hear them. Some people want truly silent builds and consider the low whirr of a PSU fan to be undesirable.
IMO: I wouldn't gamble on power usage, its better to have more than you need than not enough in any case.
I disagree regarding the 1600 as the 1300 G2 would be running around 91.5% efficiency at 1100 Watts while the 1600 would be somewhere around 95% efficiency at the same power. In other words, do you want to waste 5 cents for every dollar you spend on power or would you rather waste 8.5 cents for every dollar you spend on power?
Doesn't sound like much difference but it adds up over time.
