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Do I need a better PSU?

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  • Power Supplies
  • Components
Last response: in Components
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December 19, 2012 4:12:53 PM

Hey, I just bought a computer pre-built from my local gaming-rig-builders.
And I was wondering if my PSU is too weak. One of my friends told me it might be too weak, and if it is, I will demand a better one from the makers!!!

My build:
Case: Corsair Carbide 300R Midi Tower OEM ATX, mATX, 2x USB 2.0
PSU: Corsair CX 500W PSU BULK ATX 12V V2.3, 80 Plus
CPU: Intel® Core i7-2700K
MOB: MSI B75MA-P45
RAM: Kingston ValueR. DDR3 1333MHz 8GB, CL9 Kit w/2x
GPU: Gainward GeForce GTX 660Ti 2GB PhysX PCI-Express 3.0, GDDR5
SSD: Intel 128GB SSD
HDD: Seagate Barracuda 1000GB 3,5" hard-drive

Thanks for any answers, inputs or suggestions! It'd be greatly appreciated!

More about : psu

a b ) Power supply
December 19, 2012 4:18:45 PM

Hi :) 

Its fine for a single graphics card, stop worrying lol..

All the best Brett :) 
a c 311 ) Power supply
December 19, 2012 5:01:24 PM

Th0m3v said:
Hey, I just bought a computer pre-built from my local gaming-rig-builders.
And I was wondering if my PSU is too weak. One of my friends told me it might be too weak, and if it is, I will demand a better one from the makers!!!

My build:
Case: Corsair Carbide 300R Midi Tower OEM ATX, mATX, 2x USB 2.0
PSU: Corsair CX 500W PSU BULK ATX 12V V2.3, 80 Plus
CPU: Intel® Core i7-2700K
MOB: MSI B75MA-P45
RAM: Kingston ValueR. DDR3 1333MHz 8GB, CL9 Kit w/2x
GPU: Gainward GeForce GTX 660Ti 2GB PhysX PCI-Express 3.0, GDDR5
SSD: Intel 128GB SSD
HDD: Seagate Barracuda 1000GB 3,5" hard-drive

Thanks for any answers, inputs or suggestions! It'd be greatly appreciated!


Hi - That system will use aprrox 320w (prob a little less), so 500w is plenty
and has some headroom.

Tom
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November 10, 2013 3:35:08 AM

toyftw said:
Th0m3v said:
Hey, I just bought a computer pre-built from my local gaming-rig-builders.
And I was wondering if my PSU is too weak. One of my friends told me it might be too weak, and if it is, I will demand a better one from the makers!!!

My build:
Case: Corsair Carbide 300R Midi Tower OEM ATX, mATX, 2x USB 2.0
PSU: Corsair CX 500W PSU BULK ATX 12V V2.3, 80 Plus
CPU: Intel® Core i7-2700K
MOB: MSI B75MA-P45
RAM: Kingston ValueR. DDR3 1333MHz 8GB, CL9 Kit w/2x
GPU: Gainward GeForce GTX 660Ti 2GB PhysX PCI-Express 3.0, GDDR5
SSD: Intel 128GB SSD
HDD: Seagate Barracuda 1000GB 3,5" hard-drive

Thanks for any answers, inputs or suggestions! It'd be greatly appreciated!


Hi - That system will use aprrox 320w (prob a little less), so 500w is plenty
and has some headroom.

Tom


Hey, I was just wondering (sorry for responding late)! But how do you find that out? What calculator do you use? :p 
a c 311 ) Power supply
November 10, 2013 7:33:21 AM

Th0m3v said:
toyftw said:
Th0m3v said:
Hey, I just bought a computer pre-built from my local gaming-rig-builders.
And I was wondering if my PSU is too weak. One of my friends told me it might be too weak, and if it is, I will demand a better one from the makers!!!

My build:
Case: Corsair Carbide 300R Midi Tower OEM ATX, mATX, 2x USB 2.0
PSU: Corsair CX 500W PSU BULK ATX 12V V2.3, 80 Plus
CPU: Intel® Core i7-2700K
MOB: MSI B75MA-P45
RAM: Kingston ValueR. DDR3 1333MHz 8GB, CL9 Kit w/2x
GPU: Gainward GeForce GTX 660Ti 2GB PhysX PCI-Express 3.0, GDDR5
SSD: Intel 128GB SSD
HDD: Seagate Barracuda 1000GB 3,5" hard-drive

Thanks for any answers, inputs or suggestions! It'd be greatly appreciated!


Hi - That system will use aprrox 320w (prob a little less), so 500w is plenty
and has some headroom.

Tom


Hey, I was just wondering (sorry for responding late)! But how do you find that out? What calculator do you use? :p 


Hi - Most of the online calculators, GPU requirements, and other sites all build in headroom in their power requirement estimates. Your best bet is to check a your CPU specs, a tech review of your GPU, and realize in most systems the remainng components draw very little power in relation to the two main draws.

Those two components draw their current from the +12v rail(s), so that is a much more relavant spec than total power.

As far as sites, I use two to get a general idea if I don't see an unusual amount of other significant power draws in the system.

These sites are the following:
http://www.realhardtechx.com/index_archivos/Page362.htm

http://forum-en.msi.com/faq/article/power-requirements-...

I think back in Dec when I first responded, I might have added the CPU & GPU power draws, if I used a calculator it was prob this one:
http://support.asus.com/PowerSupply.aspx?SLanguage=en

I prefer the 1st 2 sites as they actually research and/or study the GPU systems involved.

Hi again - I also check the PSU database for the +12v rail spec for the PSU in questionn, as that is the real
key spec in relation to modern systems:
http://www.realhardtechx.com/index_archivos/Page447.htm

You can then compare the +12v amps avail, 38 for the CX500, to the estimate of what your system with a 660ti needs,
which is 24 - +12v amps from the site I linked above.
You can see you have plenty of spare headroom for you system.


!