New PC - Existing PSU sufficient?

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Temjinck

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Nov 10, 2013
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Hi guys,

I'm looking to upgrade my computer with the following components.

CPU: i5-4670K
Ram: G.Skill Sniper 8GB Kit 1600 Mhz
Mobo: AsRock Z87-Extreme4
Video Card: ATI Radeon R9 290
SSD: Samsung 840 Evo Series 250GB
HDD: Existing

I would like to use the existing PSU, which is the ENERMAX MODU82+ 525W.

I am looking to overclock the 4670K, and possibly R9 290 in the future. Is my existing PSU sufficient to power this setup? I do not think I will be adding a second video card till the next upgrade in 3 years.

I've used the online PSU wattage calculator (ENERMAX MODU82+ 525W) and found the recommended value to be 539W with CPU overlocked. I would like to avoid upgrading my PSU if possible, but want to know if the online calculator is accurate enough.

If not, please advise on an appropriate PSU and wattage level.

Thanks!!

Temjin




 
Solution
ko888
For a system using a single Radeon R9 290 graphics card AMD specifies a minimum of a 750 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 41 Amps or greater and have at least one 6-pin and one 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12...
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eatmypie

eatmypie

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Sep 12, 2013
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the wattage wouldn't be the problem, it would be the haswell processor that you have that you plan on getting that would make it so you would need a new power supply, since enermax on their website has nothing saying it is haswell ready. http://www.newegg.com/Product/Product.aspx?Item=N82E16817139040 this one will work for you just fine from corsair, 750w, and haswell certified. You will also have room for more hard drives in the future as well as overclocking and a 2nd video card.
 
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Temjinck

Honorable
Nov 10, 2013
3
0
10,510
Thanks eatmypie. I've just done some reading on Haswell certified PSU and it is only a matter of having the option of a lower power consumption during IDLE. I believe this option can be turned off in the BIOS so there is no need for me to get a Haswell certified PSU?

So you would say the 525W PSU is definitely enough for what I will have despite the online calculator suggests a higher value?

Thanks!
 
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ko888

ko888

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Feb 18, 2009
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For a system using a single Radeon R9 290 graphics card AMD specifies a minimum of a 750 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 41 Amps or greater and have at least one 6-pin and one 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

The Enermax Modu82+ 525W (EDM525AWT) power supply unit, with its maximum combined +12 Volt continuous current rating of 40 Amps and with one 6-pin and two (6+2)-pin PCI Express supplementary power connectors, is borderline sufficient/insufficient to power your system configuration with a single Radeon R9 290 graphics card.
 
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Solution
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Temjinck

Honorable
Nov 10, 2013
3
0
10,510


Thank you ko888.

I will go ahead and get the 750W PSU then. I guess if I were to ever get a second R9 290 in the next year or so, we are talking about over 1000W PSU??!! Crazy....
 
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ko888

ko888

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Feb 18, 2009
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84,990


For a system using two Radeon R9 290 graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 1000 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 64 Amps or greater and have at least two 6-pin and two 8-pin PCI Express supplementary power connectors.

Some of the high quality 850 Watt PSUs (e.g. Seasonic X-850 (SS-850KM)) meet the requirement. I wouldn't recommend much overclocking with them though.
 
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