hi im new to pc building and i have picked up a psu and hdd for 35 pound and the psu is a hp 575w will it be able to be used t

Tariq_2

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hi i picked up a 575w hp powersupply for £15 and i want to build a gaming pc on a budget of £200 to £210 and im thinking of getting an 7850k im looking for help to build one or to suggest bits but im worried that beacuse its not 80 plus certified that the psu will blow up on me its an hp 575w many thanks
 
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If you the +12V only has 15.5A, for the purposes of a modern PC, the PSU is an under-200W one. So integrated GPUs only, basically. A long time ago, it was the 5V rail that mattered, but nowadays, the +3.3V and +5V rails are mostly used by peripherals that don't eat up much power.

OEM power supplies are generally a varied bunch. Some are OK...
I doubt it is a particularly good PSU for good components. OEM ones are generally down on their stated wattage. I don't know anything about it, but maybe post the model number so others can help. What is the amperage on the 12V rail(s)?

I think most would suggest trying to save a bit more and upping to maybe £300 where there are options including a new PSU.
 

Tariq_2

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i have no idea to find that i mean i mean its enough to power all the parts i want it just the fact i dont know if it willl just blow up on me im new to pc building and you see but as it is an hp surely it should be fine??? its a well known brand and its heavy duty or something
 
There should be a label on the side - it should show a table and under the '12v' heading should be something in amps - you would expect maybe around 45 if it is a good quality 575W unit.

Since it is OEM, it is hard to know. It I likely there will be much more amperage on the 3.3 and 5v rails to take the total to 575W - you really need a good amount on the 12V rail.


By all means try it, but if you look on this site for the 'PSU tier list' it will tell you which to go for (tier 1 or 2 is fine).
 

Tariq_2

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it says 15.5amps
 

DSzymborski

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If you the +12V only has 15.5A, for the purposes of a modern PC, the PSU is an under-200W one. So integrated GPUs only, basically. A long time ago, it was the 5V rail that mattered, but nowadays, the +3.3V and +5V rails are mostly used by peripherals that don't eat up much power.

OEM power supplies are generally a varied bunch. Some are OK, many are terrible. An HP power supply isn't like getting a branded printer or something - OEM power supplies are generally chosen to power the pre-build PC, no more, and stuff like high-quality capacitors is *usually* out given that prebuilts don't typically have lifetime warranties.

The various 80 plus certifications are a measure of the efficiency, not the overall quality of the PSU. Now, there's a relationship in there, but it's not perfect. It's important to research power supplies as it's the most important part of a PC. Any PSU is guilty until proven innocent - if you see a power supply that's not on a known platform or with professional reviews (absolutely not newegg/amazon customer reviews), stay away.

 
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