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someone explain psu watts please :(

connrad96
By connrad96
in Power Supplies
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Go to solution Solved by Archangel1994,

hey all,

so i tried looking on t.he web for answers but all i get is what watts equals.

can someone explain when a power supply is rated 750w does this mean that it can pull 750w from the wall or it can power a system needing 750w sorry for the silly question :)

It means that the total wattage it can supply to the entire PC equals 750W. It will pull more from the wall due to energy loss due to heat output.

 

By far the most important is the amount of power its 12V rail(s) can supply.

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hey all,

so i tried looking on t.he web for answers but all i get is what watts equals.

can someone explain when a power supply is rated 750w does this mean that it can pull 750w from the wall or it can power a system needing 750w sorry for the silly question :)

It means that the total wattage it can supply to the entire PC equals 750W. It will pull more from the wall due to energy loss due to heat output.

 

By far the most important is the amount of power its 12V rail(s) can supply.

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The power supply regulates the amount of power being drawn, if it's 750W it can draw 750W of power at most

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hey all,

so i tried looking on t.he web for answers but all i get is what watts equals.

can someone explain when a power supply is rated 750w does this mean that it can pull 750w from the wall or it can power a system needing 750w sorry for the silly question :)

If your cpu needed 375 watts and your gpu needed 375, the psu would be able to power them both...

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PSU wattage rating / efficiency = power it takes from the wall

PSU wattage is how much gets through to your PC

it is supposed to be continuous (aka constant 750W) but some cheap manufacturers say 750W rating but that is peak power not continuous (aka it can only do 750W for a couple seconds)

so make sure you buy from a reliable brand

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...if it's 750W it can draw 750W of power at most

Except there are loads of power supplies that are rated as 500W that can't deliver 500W. There are also some review websites that do overload tests, and many good power supplies can deliver more than their rated wattage.

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Except there are loads of power supplies that are rated as 500W that can't deliver 500W. There are also some review websites that do overload tests, and many good power supplies can deliver more than their rated wattage.

Yes, but in most cases with reputable brands like Cooler Master or Thermaltake you get the rated performance and sometimes more

CPU: AMD FX-8120 | CPU Cooler: Thermaltake Contac 30 | Motherboard: GIGABYTE GA-990FXA-UD3 | Memory: Kingston 16GB (4 x 4GB) DDR3-1333 | Storage: WD 1TB | GPU: Gigabyte Radeon HD 7870 | Case: Thermaltake Chaser MK-I | PSU: Thermaltake Black Widow 850W

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Yes, but in most cases with reputable brands like Cooler Master or Thermaltake you get the rated performance and sometimes more

Cooler master makes some dangerous low end psu's (explosions and pops)

Their high end are decent tho

n0ah1897, on 05 Mar 2014 - 2:08 PM, said:  "Computers are like girls. It's whats in the inside that matters.  I don't know about you, but I like my girls like I like my cases. Just as beautiful on the inside as the outside."

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Cooler master makes some dangerous low end psu's (explosions and pops)

Their high end are decent tho

Yeah I like their V and VSM series

CPU: AMD FX-8120 | CPU Cooler: Thermaltake Contac 30 | Motherboard: GIGABYTE GA-990FXA-UD3 | Memory: Kingston 16GB (4 x 4GB) DDR3-1333 | Storage: WD 1TB | GPU: Gigabyte Radeon HD 7870 | Case: Thermaltake Chaser MK-I | PSU: Thermaltake Black Widow 850W

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what about corsair i got the cx750w

Yup that's decent

n0ah1897, on 05 Mar 2014 - 2:08 PM, said:  "Computers are like girls. It's whats in the inside that matters.  I don't know about you, but I like my girls like I like my cases. Just as beautiful on the inside as the outside."

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Yes, but in most cases with reputable brands like Cooler Master or Thermaltake you get the rated performance and sometimes more

It's hilarious that you listed CM and TT as examples of reputable brands. CM seems to be transitioning to good power supplies, but they're still most well known for their numerous godawful units like the Elite Power's and Extreme Power's, which rarely can deliver their rated Wattage.

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It's hilarious that you listed CM and TT as examples of reputable brands. CM seems to be transitioning to good power supplies, but they're still most well known for their numerous godawful units like the Elite and Extreme Power's, which rarely can deliver their rated Wattage.

I love Cooler Master, don't let me catch you talking poop

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I'll talk as much poop as I like as long as I feel that it's true. If you love CM so much, you'll respond with why you think they're a reputable brand.

None of their stuff has ever failed me, even though their fans soun like aeroplanes without low noise adapters

CPU: AMD FX-8120 | CPU Cooler: Thermaltake Contac 30 | Motherboard: GIGABYTE GA-990FXA-UD3 | Memory: Kingston 16GB (4 x 4GB) DDR3-1333 | Storage: WD 1TB | GPU: Gigabyte Radeon HD 7870 | Case: Thermaltake Chaser MK-I | PSU: Thermaltake Black Widow 850W

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None of their stuff has ever failed me, even though their fans soun like aeroplanes without low noise adapters

Have you used their low end Elite and Extreme series' power supplies, or read reviews of them? There are many that cannot deliver their rated Wattage, and the performance is pretty awful by todays standards. There was a CM 500W unit review I read where the box said [unit Name] 500W, except they didn't mean it could deliver 500 Watts, the model number was simply "500 W". Deliberately misleading, and an unacceptable business practise.

 

They are moving to better units, like the excellent V Series and the competitively priced and excellent VS Series. I just hope they stop selling the lower end garbage, and then their image can begin to improve over the next few years.

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Have you used their low end Elite and Extreme series' power supplies, or read reviews of them? There are many that cannot deliver their rated Wattage, and the performance is pretty awful by todays standards.

 

They are moving to better units, like the excellent V Series and the competitively priced and excellent VS Series. I just hope they stop selling the lower end garbage, and then their image can begin to improve over the next few years.

Yeah I never buy low-end products, if I'm on a budget I save up for quality parts. I've heard low end PSUs tend to explode

CPU: AMD FX-8120 | CPU Cooler: Thermaltake Contac 30 | Motherboard: GIGABYTE GA-990FXA-UD3 | Memory: Kingston 16GB (4 x 4GB) DDR3-1333 | Storage: WD 1TB | GPU: Gigabyte Radeon HD 7870 | Case: Thermaltake Chaser MK-I | PSU: Thermaltake Black Widow 850W

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