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Help choosing a PSU

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February 13, 2013 2:55:16 AM

Hello, this is the pc i want to build.
It is small (space wise), mainly for casual games (LoL, Diablo 3, Combat Arms).. some autocad works.

I need help with the PSU, it is a mini-itx system but the case will be a Master Cooler Elite 120 t his allow me to pick a full atx PSU for this components. (I just dont know how to determine the capacity)

Components: http://pcpartpicker.com/p/D8hM

Another question: can I get a pentium CPU (IVB) and get similar performance since the i3 is only dual core??

Forget to mention that my budget is 500~600 dollars.


thanks

More about : choosing psu

a c 1204 ) Power supply
February 13, 2013 3:23:00 AM

For a system using a single Radeon HD 7770 GHz Edition graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 20 Amps or greater and have at least one 6-pin PCI Express supplementary power connector.

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) will 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 Corsair Builder Series CX430 (SKU# 75-001666 / CP-9020046-NA), with its maximum combined +12 Volt continuous current rating of 32 Amps and with one (6+2)-pin PCI Express supplementary power connector, is way more than sufficient to power your system configuration with a single Radeon HD 7770 GHz Edition graphics card.

CORSAIR Builder Series CX430 430W ATX12V v2.3 80 PLUS BRONZE Certified Active PFC Power Supply for $44.99 USD ($34.99 USD after $10.00 rebate card)
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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February 13, 2013 4:49:01 AM

I recommend looking at sites that also do in depth PSU testing:

Jonny Guru: http://www.jonnyguru.com/

Hardware Secrets: http://www.hardwaresecrets.com/

Hardware Secrets' explanation of why a lot of power supply reviews are not very useful: http://www.hardwaresecrets.com/article/410

And these you may have already looked at, since they're part of Tom's Hardware, but in case you haven't:

Tom's Hardware Guide to PSU: http://www.tomshardware.com/forum/284314-28-power-suppl...

Tom's Hardware list of Recommended Power Supplies: http://www.tomshardware.com/forum/322966-28-list-recomm...

Note that the latter is from January 2012, so there have been some changes. In particular, considering the last reply, I've been told that the Corsair Builder Series CX series may have improved and might no longer need the warning about longevity and safety. Since, as far as I know, it hasn't been tested, I decided to forego it, but you might find it a good value. It is, after all, still on the list, despite the warning.

I do not know enough about CPUs to give you any guidance there. Good luck!
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February 13, 2013 10:16:50 AM

ko888 said:
For a system using a single Radeon HD 7770 GHz Edition graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 20 Amps or greater and have at least one 6-pin PCI Express supplementary power connector.

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.

The Corsair Builder Series CX430 (SKU# 75-001666 / CP-9020046-NA), with its maximum combined +12 Volt continuous current rating of 32 Amps and with one (6+2)-pin PCI Express supplementary power connector, is way more than sufficient to power your system configuration with a single Radeon HD 7770 GHz Edition graphics card.


Thank you for the reply and recommendation.
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Best solution

a b ) Power supply
February 13, 2013 10:27:34 AM

I'd suggest an Antec VP-450 over any Corsair CX 430. I've tried many CX 430 units of different models and never been as satisfied with them as I am with my Antec VP-450 units. They are, however, better than the other VP series models from Antec...

For the CPU, the Hyper-Threading can make a good difference for i3s despite being the same core count. If you can't afford an i3, then sure, go with a Pentium, but if you can, then I suggest going with an i3.
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February 13, 2013 10:30:11 AM

RavenCorbie said:
I recommend looking at sites that also do in depth PSU testing:

Jonny Guru: http://www.jonnyguru.com/

Hardware Secrets: http://www.hardwaresecrets.com/

Hardware Secrets' explanation of why a lot of power supply reviews are not very useful: http://www.hardwaresecrets.com/article/410

And these you may have already looked at, since they're part of Tom's Hardware, but in case you haven't:

Tom's Hardware Guide to PSU: http://www.tomshardware.com/forum/284314-28-power-suppl...

Tom's Hardware list of Recommended Power Supplies: http://www.tomshardware.com/forum/322966-28-list-recomm...

Good luck!


Thanks for the links recommended, the were very informative and helpful.

Im glad to join this forums.
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February 13, 2013 3:27:47 PM

blazorthon said:
I'd suggest an Antec VP-450 over any Corsair CX 430. I've tried many CX 430 units of different models and never been as satisfied with them as I am with my Antec VP-450 units. They are, however, better than the other VP series models from Antec...


thanks for your reply and recommendation. i really appreciated.

after reading the posts above i realize that selecting a PSU is not a simple task,
Now I know that the +12V wattage is the value i most focus while selecting the PSU, but this comes after i have evaluated the build in question and calculate the min wattage require for all the components + a safety margin= Watts of the PSU

1 question, Is it viable to use the pcpartpicker wattage stimate to calculate the +12v rail wattage??
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a b ) Power supply
February 13, 2013 4:34:54 PM

I am not aware of any site that measures power consumption properly. Maybe there are some, but from what I've seen, pcpartpicker.com is not one of them (they go off of PSU wattage and part TDP AFAIK). I've always had to do the math myself if I wanted it done right and that means looking up power consumption of the individual components in normal workloads :/ 
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February 13, 2013 9:33:14 PM

Best answer selected by pguerrerox.
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