Powertop reductions but high wall power

[Jason Berry]

Hi, I've installed Powertop and completed the autotune routine, which is now returning a series of 'good' options on the Tunables page. I think the overview page is showing my power usage as 3.99w ? see screenshot below. However I have a good quality power meter which is showing I am still drawing 45w from the wall.  I'm thinking it may be my power supply which was a spare from an older PC build (Cooler Master Rs-460-PCAP-A3).

 

Before I look at buying a new power supply, am I reading things right and what Power supply would you suggest ? I'm running an Intel I3 10105 and 2 x 4tb WD Red drives. Thanks in advance