fast guess is the psu runs out of gas at the 600 setting. do you know what the psu is?
back to the blocks we are so close to going to:
" a lighter shade of pale" when it comes to the blocks So we need four more block to come very: fast and furious.
IF we pop 4 blocks in under 90 minutes we will get to that perfectly pale green we all love to see.
Actually I don't really know...It's a 220V 80+ Platinum with 93.5% efficiency rating that Jonathan Toomim provides but I have never heard what brand it is. It could be worth checking into...
IMO no psu will achieve any kind of efficiency rating advertised by the manufacturer if it is not connected to the device that it was intended to be used for i.e. a pc or a server with an bios and os that supports energy management also in conclusion it takes power to make power watts
