PSU Advice

Jonnygrunge

Jonnygrunge

Jonnygrunge

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My Corsair HX620 is a very efficient PSU especially at load (83%)
Does this mean if measuring power consumption with a meter at the plug, it could draw a max of 750W mains to deliver about 615W (750 x 0.83) is this correct?, so if I'm about the 650W mark on the power meter, I should be OK with the PSU? (540W delivered from PSU)
Hope this makes sense!
Any advice would be appreciated!
Jonnygrunge.
 
the PSU u got is rated at a output of 620wats of contiuniosus power.

so peak power would be more then this, how ever if you are to push over the rated output, you may run into instability
 
Jonnygrunge said:
My Corsair HX620 is a very efficient PSU especially at load (83%)
Does this mean if measuring power consumption with a meter at the plug, it could draw a max of 750W mains to deliver about 615W (750 x 0.83) is this correct?, so if I'm about the 650W mark on the power meter, I should be OK with the PSU? (540W delivered from PSU)
Hope this makes sense!
Any advice would be appreciated!
Jonnygrunge.
Click to expand...

the 83% figure is often peak efficiency, as if has different amounts of efficiency at different amounts of output power. Efficiency usually drops off a little at higher load levels, but not always...

Your PSU will deliver 620W of power to your PC, while pulling 700W+ from your mains socket. :) If you try and pull more power than that then OCP will kick in and the PSU will shut down in order to prevent things getting too hot...

If you see 650W on the power meter, then you are running a rather power hungry setup, eg SLI or something like that, and the PSU is outputing ~500W or so depending on the efficiency of the PSU. You'll be fine with this PSU however... I have yet to see a PC that pulls more than 500W from the wall even though I've seen a few Q6600 rigs get close...

SPCR has detailed efficiency ratings for this PSU if you want to see them.
 
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Yeah cheers guys I think my system will draw about 500W from the wall with another 5870! Running about 350W atm with a single 5870! Thanks for the feedback!
Jonnygrunge.
 
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Yeah cheers guys I think my system will draw about 500W from the wall with another 5870! Running about 350W atm with a single 5870! Thanks for the feedback!
Jonnygrunge.
 
Dont max out the power if possible, at least not constantly, although the HX620 is a good unit and design to withstand pressure. PSUs work at peak efficiency before the 'redline' :) Bit like engines really.

Sustained 550W-575W would be about right for gaming, so say around 600W at the plug.
 
olivier renault said:
Dont max out the power if possible, at least not constantly, although the HX620 is a good unit and design to withstand pressure. PSUs work at peak efficiency before the 'redline' :) Bit like engines really.

Sustained 550W-575W would be about right for gaming, so say around 600W at the plug.
Click to expand...

good advice, bronze effecientcy PSU at around 575W output will be around 650Watt on the wall.

so anything under 700watts on the wall socket should be safe

Edit : Safe for 24/7 use

PSU will be giving its rated output when pulling 750Watt from the wall, meaning it will be at 100% load
 
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Tip my hat to you chaps sound advice!
Now if I can get my daughter off to bed early! (She's only 2!) and the wife in front of her soaps this evening!, I may get some time on my PC! :p
Jonnygrunge.
 
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