Corsair cx500w psu & GPU GTX760 questions

sgraff1 · Jun 20, 2014

Will I need more power for my rig?
I'm thinking about a Corsair cx500w psu; however nvidia says a minimum of at least 500w is required. But I've been reading everywhere that 500w is just fine. Is the cx500 a quality psu or should I grab another one?

Processor: i5 4690 3.5ghz
mobo:GIGABYTE Z97-D3H
HDD: 1TB SATA-III 6.0Gb/s 32MB Cache 7200RPM HDD (Single Drive)
CD:24X Double Layer Dual Format DVD+-R/+-RW + CD-R/RW Drive
Ram: 8GB (4GBx2) DDR3/1866MHz
Gpu: evga gtx 760 superclocked with that acx fan

Also have stock 120mm fans; thats about it, no cooling system what so ever.

Thanks in advanced. :]

Danifilth · Jun 20, 2014

When it says 500 watts requirements it means it runs half the power to be on the safe side. The power draw for that card is 160ish watts under load depending on the stress. 160w for gpu 144w for cpu 7w for hard drive 4 watt for cpu fans for example so it varies.

http://www.guru3d.com/articles_pages/geforce_gtx_760_evga_superclocked_acx_review,5.html

Think there's a story floating around the net something relating to why they say wattage requirements when it doesn't use that much. Has something to do about getting sued

jnewegger23 · Jun 20, 2014

You will be just fine. There are other higher quality psu's out there but if you do not intend to go sli in the near future this will meet your needs very well. Most Corsair psu's are above average. The cx line is a budget line but compared to others in it's price range you are getting a decent psu.

When calculating draw power you have to consider many variables such as overclocking, heat, how man drives are attached and how powerful each drive is and what their respective power draws are etc. so when guru3d makes a recommendation realize that he takes all of those factors and many others I have yet to mention into account. Based on what I see in your system the cx500 should be just fine.

sgraff1 · Jun 20, 2014

jnewegger23 :

Well I did this calculator that takes in all of those factors in consideration(idk if these are accurate, and it also doesn't list my cpu model) http://extreme.outervision.com/PSUEngine, and it says that i need a minimum of
357w. 500 is enough headroom right? CPU Utilization is at 90%TDP ( no clue what that means) and the cpu load is at 100%

ko888 · Jun 20, 2014

For a system using a single NVIDIA Reference Design GeForce GTX 760 graphics card NVIDIA specifies a minimum of a 500 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 30 Amps or greater and that has at least two 75 Watt 6-pin PCI Express supplementary power connectors. Some of the non-Reference Design GeForce GTX 760 cards have a single 150 Watt 8-pin (e.g. ASUS GTX 760 DirectCU II OC) or two 150 Watt 8-pin (e.g. MSI GTX 760 HAWK) or one 75 Watt 6-pin and one 150 Watt 8-pin (e.g. Gigabyte GTX 760 WindForce OC, EVGA GTX 760 SC w/ACX Cooler, MSI GTX 760 TwinFrozr Gaming) PCI Express supplementary power connectors.

Corsair CX Series 500W CX500 (SKU# 75-001667 / CP-9020047)
• OEM: CWT (Channel Well Technology)
• maximum combined +12 Volt continuous current rating of 38 Amps <===== this is more than sufficient to power your system configuration
• two (6+2)-pin PCI Express supplementary power connectors
• Modular Output Cables: No
• Official Intel Haswell Compliance: No
• 80 PLUS BRONZE Efficiency Certification
• 3 Year Limited Warranty

jnewegger23 · Jun 20, 2014

sgraff1 :

Could you print screen what your input was so I can catch anything you may have missed or not? Assuming you hit all cylinders 143W is plenty of headroom. Even if you didn't this psu should take great care of you. Just don't try to sli on this. If you plan on upgrading to a stronger gpu in the future you may want to consider a stronger psu now and anticipate what that demand will be. Past this you'll be over thinking it. You're all good!

@ko888 what a great detailed post! op should be very grateful! Talk about getting peace of mind from some knowledgeable members. You are lucky to have such input from a poster with his/her resume!

sgraff1 · Jun 21, 2014

jnewegger23 :

sgraff1 :

Could you print screen what your input was so I can catch anything you may have missed or not? Assuming you hit all cylinders 143W is plenty of headroom. Even if you didn't this psu should take great care of you. Just don't try to sli on this. If you plan on upgrading to a stronger gpu in the future you may want to consider a stronger psu now and anticipate what that demand will be. Past this you'll be over thinking it. You're all good!

@ko888 what a great detailed post! op should be very grateful! Talk about getting peace of mind from some knowledgeable members. You are lucky to have such input from a poster with his/her resume!

http://imgur.com/espxYu5 part 1

http://imgur.com/5aWiYqY part 2

thanks @ko888

jnewegger23 · Jun 21, 2014

sgraff1 :

So, as I concluded it looks like you may have been able to even get away with a cx430 albeit with much less "head room" which I do not recommend but anyhow, I would always heed the manufacturer's recommendation first which in your case is 500W. If I were you I'd anticipate and recheck with as many possible "extras" like an ssd, external hard drive, etc and see how high that puts you and while you did not purchase the "k" version still put a light overclock (there are ways to acheive this) in that calculator just so you have an idea of how much head room you'd be left with still in that scenario. No need to post it here but just run that through the calculator again for extra peace of mind if you want. Either way, you are good! Now go have fun with your build!

Thanks,

Justin S.

ko888 · Jun 21, 2014

Don't ignore the eXtreme Power Supply Calculator's warning:

ATTENTION:
The recommended total Power Supply Wattage gives you a general idea on what to look for BUT it is NOT a crucial factor in power supply selection! Total Amperage Available on the +12V Rail(s) is the most important, followed by the +5V amperage and then the +3.3V amperage.

A modern PC obtains most of its power from the +12V rail.

Graphics card manufacturers overstate the system power supply requirement by 50 Watts to take into consideration some of those cheaper power supplies with a weaker combined +12V rail(s).

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Corsair cx500w psu & GPU GTX760 questions

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