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multi rail combined ampage? - Page 2

post #11 of 17
Quote:
Originally Posted by jy360 View Post
yeah it looks pretty awful. why is it they can sell it rated at 850w ?
Because there's no regulation of the power supply market, and very few people know enough about power supplies to be able to call BS conclusively. The only "consumer watchgroup" really are review sites like JonnyGURU.com, HardOCP.com, and HardwareSecrets.com



Anyway, that looks a lot like a mediocre 450-500W labeled as an 850W.
post #12 of 17
Why not? This industry has basically no oversight whatsoever. If you go after them for selling a ****ty unit, they can probably put together a bull**** way of proving that the unit can deliver 850W and that the sticker ain't lying, so long as you're drawing totally unrealistic amounts of power from the +3.3V and +5V rails. It's just that no modern computer will ever be drawing that much power from those two rails since most of the major power these days comes from the 12V transformer, whereas the +3.3V and +5V rails power small, low-power circuitry such as RAM, motherboard chipsets or the PCB under a hard drive (while the HDD's motors use 12V).
post #13 of 17
Quote:
Originally Posted by Shub View Post
Why not? This industry has basically no oversight whatsoever. If you go after them for selling a ****ty unit, they can probably put together a bull**** way of proving that the unit can deliver 850W and that the sticker ain't lying, so long as you're drawing totally unrealistic amounts of power from the +3.3V and +5V rails. It's just that no modern computer will ever be drawing that much power from those two rails since most of the major power these days comes from the 12V transformer, whereas the +3.3V and +5V rails power small, low-power circuitry such as RAM, motherboard chipsets or the PCB under a hard drive (while the HDD's motors use 12V).
Plus they'll say that it's a peak rating, and/or the wattage pulled from the wall, or even the VA pulled from the wall (and a 300W PSU that's 70% efficient with a .55 power factor can appear to be a 780W PSU under those criteria).

As a last resort, or in some cases as a first resort, they may claim that "xxxW" is just the model #, not an indication of the wattage the PSU can provide.
post #14 of 17
Thread Starter 
Quote:
Originally Posted by Shub View Post
Why not? This industry has basically no oversight whatsoever. If you go after them for selling a ****ty unit, they can probably put together a bull**** way of proving that the unit can deliver 850W and that the sticker ain't lying, so long as you're drawing totally unrealistic amounts of power from the +3.3V and +5V rails. It's just that no modern computer will ever be drawing that much power from those two rails since most of the major power these days comes from the 12V transformer, whereas the +3.3V and +5V rails power small, low-power circuitry such as RAM, motherboard chipsets or the PCB under a hard drive (while the HDD's motors use 12V).
that's quite ridiculous surely something can be done to sort this
:3
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:3
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post #15 of 17
I highly doubt it cleanly provides that much amperage, and the ripple on these are probably awful.

I've bought three Arianet PSU's, one was in a Storm box (the PSU manufacturer varies with each batch they get), the last was a supposed 600w, prior was a 550w (listed as 500 but people were getting 550's instead), and a 500w before that.
All cheap PSU's by, Aria, Overclockers, or wherever are usually similar.

The fan's started making godawful noises in the first 2-3 months, after I think 4 months the 500w just died, the 550 died after 6 months, and the 600w is making hellish noise in my bro's PC, and all of the above was limiting my OC attempts to boot.

A good quality 650 will blow that 850 outta the water, and give you peace of mind. I would risk it for a chocolate biscuit if you even remotely like your system.

If you wanna power an old system of someone elses, that consumes like 100-200w max, that 850 will do just fine.
 
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post #16 of 17
Quote:
Originally Posted by jy360 View Post
that's quite ridiculous surely something can be done to sort this
Yea, it's called make informed purchases.
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post #17 of 17
Quote:
Originally Posted by rx7racer View Post
Yea, it's called make informed purchases.
A technique which fails in the face of the huge ocean of uninformed purchasers who just buy whatever has the right things on the box and looks pretty
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