Looks like they didn't even bother to update all the labels. One of them lists its input as 180-240V 10A. At the max voltage that's 2400Ws minus whatever the efficiency penalty is.
What really scares me is that the input connector is a C14, which is also only rated for 10A. For the power draw it's rated for at max load they need a C20 which can deliver 16A.
Without fixing that, this thing isn't just not 80+ certified, but it can't pass any national safety standards (eg UL listed in the US.), because it could be connected to the wall using a power cable not rated for the amount of power it can draw and potentially into an outlet not rated for it either.
I really hope this is just an early engineering sample they're showing off and not a product in a shipping ready configuration.
There's a major difference between idiots doing stupidly unsafe things off label, and shipping a product that's designed in a way that invites you to burn your house down.
Bundled PSUs drops the efficiency of the system. If each PSU is 90% at half load then the combined efficiency is only 81%. Considering its cost and size, you're better off buying two PSUs which can be cheaper and not deal with a higher quality/gauge power cord.
I've seen a similar setup using refurbished 1200W HP server PSUs which costs less and a lot smaller (though the fans can be high pitched). Each PSU is rated at 95%.
No, you don't add percentages that way, if you had two 90% Efficient supplies drawing 100w and delivering 90w the combined would be drawing 200w and delivering 180w. 180w is 90% of 200w.
Are there any corresponding motherboards that would be designed to accept only a single PSU connector, with that much (3.3K) Wattage? There are YouTube videos showing recent crypto-mining motherboards which include 3x PSU connectors. In other words: 3x separate PSU's, not some behemoth PSU with only one motherboard connector. The featured PSU's look like safety hazards: more likely to catch on fire than to produce any crypto-coins.
nope. Not safely anyway. There're maximum current limits for each pin in the connector itself. That's why as CPU power has grown high end boards have gone from a 4 pin connector to an 8 pin connector, to a pair of 8 pin connectors; with occasional examples in each generation adding a GPU or accessory power connector somewhere on the board as well.
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gregounech - Monday, June 11, 2018 - link
Oh yes these famous Cyrptocurrency Miners.DanNeely - Monday, June 11, 2018 - link
Looks like they didn't even bother to update all the labels. One of them lists its input as 180-240V 10A. At the max voltage that's 2400Ws minus whatever the efficiency penalty is.What really scares me is that the input connector is a C14, which is also only rated for 10A. For the power draw it's rated for at max load they need a C20 which can deliver 16A.
Without fixing that, this thing isn't just not 80+ certified, but it can't pass any national safety standards (eg UL listed in the US.), because it could be connected to the wall using a power cable not rated for the amount of power it can draw and potentially into an outlet not rated for it either.
I really hope this is just an early engineering sample they're showing off and not a product in a shipping ready configuration.
Lord of the Bored - Tuesday, June 12, 2018 - link
Honestly, if that is the scariest thing in a miner build, then miner builds have gotten a lot tamer than the last time I looked.DanNeely - Tuesday, June 12, 2018 - link
There's a major difference between idiots doing stupidly unsafe things off label, and shipping a product that's designed in a way that invites you to burn your house down.zodiacfml - Monday, June 11, 2018 - link
Bundled PSUs drops the efficiency of the system. If each PSU is 90% at half load then the combined efficiency is only 81%. Considering its cost and size, you're better off buying two PSUs which can be cheaper and not deal with a higher quality/gauge power cord.I've seen a similar setup using refurbished 1200W HP server PSUs which costs less and a lot smaller (though the fans can be high pitched). Each PSU is rated at 95%.
Meaker10 - Tuesday, June 12, 2018 - link
No, you don't add percentages that way, if you had two 90% Efficient supplies drawing 100w and delivering 90w the combined would be drawing 200w and delivering 180w. 180w is 90% of 200w.londedoganet - Tuesday, June 12, 2018 - link
Clearly, the first PSU is there to supply power to the second PSU. /sDr. Swag - Tuesday, June 12, 2018 - link
Yes, because of course the psus are connected in series even though that wouldn't even work.cpy - Tuesday, June 12, 2018 - link
So sticker says 240V + 10A, how do they get 3300W again?PeachNCream - Tuesday, June 12, 2018 - link
You get 3300W the same way you get money from cryptocurrency, magically!vailr - Tuesday, June 12, 2018 - link
Are there any corresponding motherboards that would be designed to accept only a single PSU connector, with that much (3.3K) Wattage? There are YouTube videos showing recent crypto-mining motherboards which include 3x PSU connectors. In other words: 3x separate PSU's, not some behemoth PSU with only one motherboard connector. The featured PSU's look like safety hazards: more likely to catch on fire than to produce any crypto-coins.DanNeely - Tuesday, June 12, 2018 - link
nope. Not safely anyway. There're maximum current limits for each pin in the connector itself. That's why as CPU power has grown high end boards have gone from a 4 pin connector to an 8 pin connector, to a pair of 8 pin connectors; with occasional examples in each generation adding a GPU or accessory power connector somewhere on the board as well.