Why Do Computers Use So Much Energy?
blogs.scientificamerican.com
Why Do Computers Use So Much Energy?
1–10 of 174 posts
Re: Why Do Computers Use So Much Energy?
#2What i don't understand is how a phone can be so powerful with so little watt usage. especially compared to a PC
Re: Why Do Computers Use So Much Energy?
#3What i don't understand is how a phone can be so powerful with so little watt usage. especially compared to a PC
There's a lot less of it, and PCs aren't nearly as optimised for low energy usage.
Re: Why Do Computers Use So Much Energy?
#4What i don't understand is how a phone can be so powerful with so little watt usage. especially compared to a PC
There's a lot less of it, and PCs aren't nearly as optimised for low energy usage.
Laptop cpus are still quite faster for complex computation, on a phone it's rarely the case and they have gpu/npu as coprocessor to avoid wasting energy there.
Re: Why Do Computers Use So Much Energy?
#5Wait until landauer principle gets proved :)
Re: Why Do Computers Use So Much Energy?
#6What i don't understand is how a phone can be so powerful with so little watt usage. especially compared to a PC
Power consumption is more or less square to per-thread throughput.
Power consumption is between square and m^n to inter-core bandwidth and count.
So, a high-end smartphone CPU might do 1/5th of the throughput of a desktop CPU using 1/25th of the power.
Re: Why Do Computers Use So Much Energy?
#7What i don't understand is how a phone can be so powerful with so little watt usage. especially compared to a PC
There are a lot of efficient PC's available. My HTPC sleeps when not playing and when streaming 1080p/4k videos only uses about 25 watts... which isn't bad considering its streaming from a NAS with plex through to an Xbox One.
Phones, on the other hand, are highly specialized - PC's are general purpose. Trade off is often power requirements and performance.
My 8 core 16 thread Ryzen Gaming PC smokes anything my phone can do and i guess if i really wanted to compare i could do a taskper watt calculation and see how they compare.
When i use my phone like a computer, its power draw increases and i get just a couple hours of battery use. play fortnite on your phone and it goes dead quick.
Re: Why Do Computers Use So Much Energy?
#8What i don't understand is how a phone can be so powerful with so little watt usage. especially compared to a PC
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Re: Why Do Computers Use So Much Energy?
#9What i don't understand is how a phone can be so powerful with so little watt usage. especially compared to a PC
This is only true when comparing older PC hardware.
There is simply no comparison to make when we are talking raw compute power. If there were, the DC market would be dominated by x86 processors with stupidly low power consumption. The cost savings from the smaller power/heat footprint would be absurd.
Re: Why Do Computers Use So Much Energy?
#10Koomey’s law says new computers use less and less all the time :)