Corsair AX1600i (1,600W)

[HEXUS]

World's best consumer PSU?

Read more.

[Bagpuss]

I suppose all the parasitic scum miners will have a need for it, everyone else not so much.

[kalniel]

You may wonder, as we did, why the AX1600i doesn't ace this chart, given that it is the only one with 80 PLUS Titanium efficiency. One plausible reason is that running, say, 20W and 40W, which we did, is such a small percentage of total load that the supply cannot hit high efficiencies.

That's not a plausible reason. A plausible reason would be some reason that explained why small percentage of load is less efficient.

If you are building a truly dream rig with a limitless budget, the choice of PSU is disarmingly simple: the Corsair AX1600i.

Seems odd, given the above failing. Ditto the lack of mention in the cons at the end.

[liquidflower]

the AX1600i's 140mm fan kicks into action at around 700W load

Nice, that's 100W more than the Seasonic Prime 600W Fanless. This would make a good psu for a quiet 1080 Ti build

[CAT-THE-FIFTH]

Considering I like mini-ITX rigs,I think I already have my PSU of choice,the Corsair SF450!!

It just shows you how far PSUs have advanced when you can get upto 600W of power in a pint sized PSU(PSUs like the SF600 and the Silverstone equivalents for example),with decent effiency and in the case of the SF450 its not even that noisy!!

[rwh202]

That's not a plausible reason. A plausible reason would be some reason that explained why small percentage of load is less efficient.

Seems odd, given the above failing. Ditto the lack of mention in the cons at the end.

A power supply draws some power, even at no load - for monitoring, control, fan etc.

At no load, then you have 0% efficiency (on all PSUs)

An advanced power supply that say has a 1W overhead at idle, suffers a 5% drop in efficiency at 20W, even if it could deliver those 20W with no further internal losses.
The internal losses are also going to be higher for a bigger PSU with more parallel output devices, all with their own leakage etc. and operating way down their performance curve.

And also, so what? do you care about losing 10% at 20W if you're gaining 1% at 1000W?

[DeLaVeGaGR]

133A at 12V Rail noice i can jump start my car

[kalniel]

A power supply draws some power, even at no load - for monitoring, control, fan etc.

At no load, then you have 0% efficiency (on all PSUs)

An advanced power supply that say has a 1W overhead at idle, suffers a 5% drop in efficiency at 20W, even if it could deliver those 20W with no further internal losses.
The internal losses are also going to be higher for a bigger PSU with more parallel output devices, all with their own leakage etc. and operating way down their performance curve.

See, that's a plausible explanation.

And also, so what? do you care about losing 10% at 20W if you're gaining 1% at 1000W?

Yes, absolutely, if you spend 90% of your time at 20W and none at 1000W