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850w POWER SUPPLY QUESTION

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  • Sabertooth
  • Power Supplies
  • Computers
  • Build
  • Components
Last response: in Components
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December 30, 2013 5:42:58 PM

Hi... this is my first thread and my english is terrible so I'll try to be brief.. I decided to build a new computer. I bought an ASUS sabertooth z77, i5 3570k, GTX 660ti msi power edition, NZXT phantom 630, 2x8 corsair vengeance pro, but I'm confused about the PSU, I have a modular 850w but I'm worried that it will be too much and it won't be so efficient so I was planning on selling it and getting maybe a 650w, i dont want it to work at 15% all the time, because i heard that they work better at 50% - 90% so I don't wanna be overpowered. I will be overclocking and probably adding another gpu on sli, or just one but much better than the 660. Thank you!

More about : 850w power supply question

a c 2489 ) Power supply
December 30, 2013 5:46:16 PM

As long as it's a decent 850w , keep it , the computer will only draw the power it needs.Also if it's decent you can SLI with it.
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December 30, 2013 5:59:09 PM

if you are really concerned with efficiency you should get something like this:
http://www.amazon.com/Corsair-Series-80PLUS-Gold-Certif...
The fact that powersupplies run most efficient around that point is certainly true, but you also need to consider the 80 plus rating. This powersupply will probably save you a ton of energy when running that system or even with another 660, although in that case i would go with the 650w version for a few bucks more. However we are talking a maximum of 15% power savings unless your current supply is complete crap, so you should think about it before buying. Buying a similar quality 650w supply will not provide any noticeable power savings.
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a c 311 ) Power supply
December 30, 2013 6:09:07 PM

opentildoomsday said:
Hi... this is my first thread and my english is terrible so I'll try to be brief.. I decided to build a new computer. I bought an ASUS sabertooth z77, i5 3570k, GTX 660ti msi power edition, NZXT phantom 630, 2x8 corsair vengeance pro, but I'm confused about the PSU, I have a modular 850w but I'm worried that it will be too much and it won't be so efficient so I was planning on selling it and getting maybe a 650w, i dont want it to work at 15% all the time, because i heard that they work better at 50% - 90% so I don't wanna be overpowered. I will be overclocking and probably adding another gpu on sli, or just one but much better than the 660. Thank you!


If it's a good quality unit keep it. Yes, most PSU's have peak efficiency in the 50% max output range, but most good ones are still pretty efficient at 20%. And, if you're upgrading or adding another GPU, the xtra power will be helpful.

Also, a higher power PSU than you need, won't be working as hard and should produce less heat and less fan noise.
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a c 311 ) Power supply
December 30, 2013 6:40:22 PM

opentildoomsday said:
Thanks guys !! This is my PSU and it's 80 plus bronze.
http://es.sentey.com/productos_print.php?prod=mbp850-hm

What do you think?? I couldn't find any reviews so I wasn't completely sure. But I think I'll keep it and see how it works. Thank you veyr much.


Hi - Right - no reviews from a trusted review site - but it looks like a good unit - modern design - OEM is
Sirtec which can make some decent units, has it's tot rating avail in +12v amps, usually a sign of a
good unit.

Modular cables & 5 yr warranty. Looks like a keeper to me.
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