My desktop computer at home for years has had an Antec True 380W Power Supply. It’s worked well and I’ve never had any problems. Recently, I became interested in 80plus Power Supplies, and wondered if I could save significantly with one. I found that Antec is now producing a 80plus version of the same power supply I already had, so this made for a perfect comparison. Last week, I upgraded to the Antec Earthwatts 380W Power Supply!
SilentPCReviews has a great review of the Antec True Power Supply. Their tests show that it’s efficiency is somewhere between 65-68% for the loads my machine is currently using. According to the 80plus report for the Antec Earthwatts, it is ~82% efficient. Given that, I expected to see about a 20% improvement.
To measure, I bought myself a great tool, called the Kill-A-Watt. I highly recommend you get one if you don’t have one already. It cost about $23, and it’s been great for hyper-analyzing every appliance in the house.
I then ran some basic tests and here is are the measurements that my computer used at idle and peak loads:
|Antec 380W True
|Antec 380W Earthwatts