Sargent Duck wrote:So I read this article over on Dailytech. 90% power supplies. But instead of being labeled 90%, they're being called 80 plus platinum. Who came up with that lunacy? Did they hire Nvidia's marketers or something?
I assumed it would be a goof thread linking to a story about some wacky 90-year-old.balzi wrote:I'd be very interested in what people first thought this thread was about from the title.
Yeah, but all the attention by the mfrs seems to be aimed at near-kilowatt supplies. While it's true those are the ones that benefit the most from increased efficiency and certainly that's the market that won't be dissuaded from paying a little extra for the latest features, it's a little annoying when they're way overkill for most modern systems (which, ridiculous multi-GPU setups aside, are getting less power-hungry compared to a few years ago).MadManOriginal wrote:Got to pay for the R&D somehow, and that somehow is to release them in high-power high-margin PSUs first.
That's definitely true if you're thinking about replacing an existing supply that is otherwise adequate for your needs. If you're planning a new build, though, and you do plan to run it many hours a day and expect to keep the PSU (and perhaps case) for years while you swap in other parts, it does make sense.Anyway I'm glad to see this but a while ago I was thinking of replacing an 80+ 'regular' PSU with something 5% more efficient. It turns out that unless you're running a hundreds of watts 24/7, while the percent improvement is nice the absolute power change is not very much. Electricity would have to be a *lot* more expensive for it to make financial sense.
JustAnEngineer wrote:200 watts inside the case ÷ 80% efficiency = 250 watts used from the wall.
200 watts inside the case ÷ 90% efficiency = 222 watts used from the wall.
250 - 222 = 28 watts saved.
28 watts x 24 hours/day x 365¼ days/year = 245½ kilowatt-hours per year.
245½ kwhr/yr x 15¢/kwhr = $36.82 saved per year.
Most of us would be satisfied with a 3-year payback on our investments, so if the PSU costs less than $110 and you fold 24/7, it's probably a good buy.
UberGerbil wrote:I assumed it would be a goof thread linking to a story about some wacky 90-year-old.balzi wrote:I'd be very interested in what people first thought this thread was about from the title.
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