In my experience, no. I've actually tested similar levels of loads with exactly both models of power supply, and the 1280 uses a few watts more.I have a SC 216 running one PWS-741P-1R. I have a PWS-1K28P-SQ available I could put in it. Would the SQ be more efficient? Thought I'd ask before I modded the SQ to fit. I'd rather not if I stand to gain nothing by making the switch.
TIA
View attachment 6481
I haven't tried the 500w platinum, so I can't say for sure. Looking at the specs, it doesn't look very impressive. The efficiency may be within bounds for the 80+ P rating, but the power factor is atrocious by comparison. In a datacenter this is very relevant where you are billed by the amp, less-so for home use where you are billed by the watt.Efficiency levels of the SQ and non SQ Platinum PSUs are fairly similar. For lower utilization the smaller PSU's are almost always better since you get to the most efficient range easier.
So In your case (175W) the most efficient PSU will be 500W Platinum, then the 741 then the SQ
are the amps of the reactive power included in the accounting?I haven't tried the 500w platinum, so I can't say for sure. Looking at the specs, it doesn't look very impressive. The efficiency may be within bounds for the 80+ P rating, but the power factor is atrocious by comparison. In a datacenter this is very relevant where you are billed by the amp, less-so for home use where you are billed by the watt.
I'm not sure about accounting. The power supply test reports show amps, watts input, watts output, efficiency %, and power factor, at 10%, 20%, 50%, and 100% load. The 740 watt seemed like the sweet spot for low power use situations. The 10% load figures on the 740 were about as good as the 20% figures on the 500w, and the 20% figures on the 740w looked better to me than the 50% figures on the 500w. Again, the biggest difference was power factor and this is less relevant when you care about watts and not amps.are the amps of the reactive power included in the accounting?
I fortunately have accounting by metered watts, so didn't care about when deciding on psu's
Maybe in terms of efficiency you are better off with the 200W (i guess it's a gold) PSU, especially when the nodes are idle a lot.A Xeon D 1518 system idle power using a 920SQ was around 80W. It went down to 36W when I installed it in a Cse-505-203B chassis with a 200W PSU.
If you are willing to give up the hotswap capability, you probably can use the PWS-341P-1H which is the smallest platinum rated PSU from SuperMicro with PMBus.