Topic: Power efficiency question (Read 213 times)

Practice without knowledge of the theory can end in death, if we talk about the use of weapons. If you served in the army, then you know that before live fire, you do the same on unloaded weapons or weapons with training cartridges.
A simple example, beginners ask where to start mining?
From checking electrical outlets, if there is no ceramic base, then change it, and check the thickness of the wires in order to understand what maximum load can be used. If several more parallel outlets are connected to these wires, to which household appliances are connected, you need to know this.

That's why practical makes more sense than theory, every first experience will be different from what you imagined or read in the book, it's like learning how to shoot a gun in the book instead of visiting shooting range for practice lol, physics my foot 👣👣👣

You confirm my words. Some beginners damage their video cards in this way. You gain knowledge from your own experience, and your losses are your payment for experience.
Or you keep a close eye on those who have already made mistakes and teach other miners not to make similar mistakes.
You cannot service and repair mining farms if you are annoyed, hurry up, etc. Before turning on the mining farm, you need to check all connections and power cables.

You nailed it, what's physics have to do with selection of power supply for your mining farm? How many physics experts even know how to build mining rigs? Can they do it without google help or asking someone? I turned a freaking riser backward and got my gpu killed, why can't physics safe me from this? 🤣🤣🤣🤣

Physics does not teach such knowledge. It is better to ask unclear questions from experienced miners.
Knowing physics will not help you choose a good power supply for your mining farm. You can buy the most expensive PSU, but this is not a guarantee of the best choice.
I can write you a list of power supplies, and if you are a Ph.D. in physics, you will not give good advice.
This knowledge can be gained from your mining experience or the experience of other miners.

Dunno about your education system but where I grew up no one cared what you are "up to". You had to study physics, chemistry, biology, astronomy etc and then take exams, or you simply don't graduate LOL. And those who hated "science" classes at your high school now seriously discuss flat Earth, yoga, anti-vaccination etc etc   

You'd be disappointed mate, not everyone are into basic physics at high school, in my country many students will leave science class for business class or Art class, everyone hates science class lol 😂, anyways the question isn't that bad, what you don't know means you don't know, not everyone know about crypto and btc today, imagine facepalming infront of such people 😂😂😂

Reading questions like these makes me wonder if these people did learn any basic physics at high school... Facepalm

Don't overpay for a power supply. Usually miners use 80+ Gold.
But there are also Chinese manufacturers who do not pass certification, but their blocks give the same results.
QDion QD 1500 90+
Yorjim 1600w 90 gold
etc

Every miner should own a kill a watt meter to measure power pulled from the wall outlet.

They are well under 30 usd.
When you realize 4 x 1660 cost over 2000 usd having a meter to test your power draw is common sense.

Atx psu do not like drawing more Than 80% 24/7/365

Bad idea, even if your gtx1660 super is drawing 70 watts while mining that isn't the exact total power from wall, I'm guessing around 100watts per gpu and you will have 200watts left for motherboard, CPU, fans, HDD, cables, not good mate

You can measure your efficiency but it need alot of doing stuff around. you read wattage from wall and reading from what you are consuming. Software will not report you correct power consumption you must test it manually without PC. Heavy loads like resistors. lets say wall showing 600w but you are consuming 500w  500/600= 0.83x100 = 83 %  efficiency is your power supply. Also it is different in some point like 20% load 50% load and 100% load.
600w is not good for 4x1660 even they are less power hungry that psu will not last long. 850w psu will be good choice for 4x1660

@Vann so if my powerpack has no 80 Plus sign on it means it's low efficiency? Also is OCZ powerpack good? I have one I'm not using with 80PLUS rating on it, though it's just 600w which is enough for 4 gtx1660 super since they are less power hungry

A PSU's rated efficiency is based on how efficient the PSU is in transforming the AC power from the wall in to the DC power that your components can use. 80 Plus is an organization that tests and certifies PSU's for manufacturer's and groups them according to their efficiency.



Higher rated PSU's consume less power because they use better quality components that are more efficient. e.g. In converting a 500 watt load, a PSU rated at 90% efficiency will consume 555 W from the wall vs a PSU rated at 80% will consume 625 W from the wall for the same 500 W load. The rest is wasted in heat.

How efficient a power supply is also depends on the percentage of the rated load being outputted, with most PSUs running at maximum efficiency around 50% load. Better quality PSU's are able to keep their rated efficiency for a higher percentage of the maximum output. Better quality dual conversion PSU's also convert the entire energy into a 12V single rail and then uses VRM to generate 5V and 3.3V. The cheaper PSU type converts using different taps in the transformer for each voltage and use the 5V line to regulate the voltage, instead of the 12V line like the dual conversion models. In mining, that causes voltage instability from not loading the 5V line. As far as for mining, I would stick to Gold or higher rated PSU's from EVGA, Superflower, Seasonic or Corsair.

How do you define a power efficiency power supply and non power efficiency power supply? Can a non efficiency power supply use consume more electricity just because it's not efficiency?