PSU Size? Online Gadget.

These tools are rather flawed, for various reasons. Being completely ignorant of variations in power supplies beyond wattage for one, and the difference between current draw and thermal envelope of a processor for a second.

Look for the amps available on the 12V rails, and compare it to that which your graphics card needs. That'll do for a first approximation. For a second, add on the power you expect your processor to draw, which is best done by asking someone who measured a similar cpu, and you're pretty close to the wattage required. If you want to be really sure, then pick a psu which has the above wattage in the band where it is most efficient. This builds in headroom for mistakes, and costs the least electricity if you get it right.

Or just buy the biggest corsair you can afford :p
 
The whole PSU issue still confuses me. Still not sure if I would be better off with a 850W or a 1000W to safe guard my system for a raft of upgrades next year.
 
Sindri said:
To warrant a 1000watt psu you would be talking a tri sli/crossfire configuration.
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Well, I also want to look at a TV card etc for my rig next year. And a blu-ray drive, and a high end sound card. I need a new PSU now. As I want to safeguard my current investment. I don't trust my old PSU really.
 
EsaT said:
This is only one using measured values
http://web.aanet.com.au/~SnooP/psucalc.php

Or same manually:
Search for measured consumption of CPU and graphics card and then add further 50W for other parts and you'll have good overall estimate of power consumption.
http://xbitlabs.com/articles/cpu/
http://xbitlabs.com/articles/video/


And you'll have PSU running below 80% efficiency most of the time...
Click to expand...

i think the 2.5w it estimates for the 4830 is a little off :p very good though, best one around.

It wouldnt be hard to do that in a simple spread sheet if we had all the data collected:)
 
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