Silverstone 1500w - Does that mean 1500w DC output or max input ac

[mackminer]

Hi,
I'm running a rig that is showing as using nearly 1500w at the plug. If I up the power of my cards to increase performance the machine switches off.

Any ideas on what to do here?

Thanks.

[squall1066]

I always allow 20% MINIMUM on draw, Meaning if I have a 1.5KW PSU, I will only use it up to 1.2KW Running it at max greatly reduces life of the capacitors, Even a platnum rated psu will run hot and burn out after time.

I would split the load over two PSU's, If your Drawing 1.5KW Get two good 900W on the 12v on single rail, This will keep you running smooth and cool 

[Photon939]

Power supplies are rated by their maximum DC output, so at true full load you will be pulling a few hundred watts more than the label rating due to efficiency losses.

You're likely exceeding the current limit for one of the 12v rails which causes the shutdown.

[GenTarkin]

Power supplies are rated by their maximum DC output, so at true full load you will be pulling a few hundred watts more than the label rating due to efficiency losses.

You're likely exceeding the current limit for one of the 12v rails which causes the shutdown.

Hardly any modern decent high wattage PSU has seperate regulated 12v rails =)
In fact, I think no decent high watt PSU has seperate rails. That was a huge fad that kinda disappeared.

Also, to the OP... you arent tripping your mains breaker are you? thats pretty close to a 15amp limit on 110/120v mains...

Another thought is, some PSU's hate being heavily crossloaded(no / little power being used on either 3.3/5v & almost all being used on 12v or visa versa) .. usually this just results in overall effeciency drop, but not complete shut down. This is rarely seen in highend 1kw+ PSU's

[shacky]

I have 4 of 12 Silverstone PSU with problems, I suggest you to take care with that PSU.

[ssateneth]

It means 1500 watts of potential DC. If it is 80% efficient, that means you can draw 1875 watts of AC at the wall socket.