My experience - consumption:

3x S3 (218,75MHz) - PSU Corsair RM1000 230V 1000W (12V/83A) - on the wall 1020-1035W, so if efficiency 88%, it means on DC side only 905W (+/-)

2x S3 (218,75MHz) - PSU FSP AURUM PRO 850 230V 850W (12V/70A) - on the wall 670-676W
2x S3 (237,5MHz) - PSU FSP AURUM PRO 850 230V 850W (12V/70A) - on the wall 740-745W