DC or AC?

[mikeshn]

Computer use AC or DC? Also how what is cinosumption of a computer?


Thanks

 

[flot]

DC.

Never heard of cinosumption?!

Edit: Sorry, what I meant by the above is : " I have never heard of cinosumption. "

 

[mikeshn]

nope . What is this? Thanks

 

[RaynorWolfcastle]

DC, that's why you have a power supply.

-Ice

 

[BScott881]

All digital circuitry devices use DC. The computer power supply uses AC then converts it to DC at +5v, +12v, -5v, and -12v.

 

[mikeshn]

so Computer supply 5v or 12 v?

 

[BScott881]

Computers use both. The circuits use 5v, the mechanical devices use 12v. (drives)

 

[mikeshn]

Thanks for your help
But when the electrical device use -12v?

 

[Mark R]

-12 V is used for serial (COM) ports, sound cards, and some graphics cards.

Power consumption is very variable.

A middle-grade PC (Athlon 1000 MHz, GeForce 2, 2 Hard drives) uses about 90 W when idle, and 125 W when busy. A 17 " monitor uses about 90 W.

A simple PC (Celeron 700, 1 slow HD, integrated graphics) uses about 50 W when idle, and about 60 W when busy. A 14" monitor uses about 50 W.

These figures are based on measurements of my PCs using a true energy meter (not by measuring current in the mains cable which is a very inaccurate method).

 

[digme]

actually for reasons of DC wander, i think computers use to be specific, -12V not +12.....

most electronic or digital devices use - voltage for reasons of digital modulation and minimizing of error...

 

[Jerboy]