Good PSU Upgrade?

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bluelobster

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Mar 30, 2013
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I was planning on going with a 600W ocx psu (http://www.amazon.com/gp/product/B001EYV690/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1) for my build (http://pcpartpicker.com/p/OnQC).

The parts have started rolling in, I have most of them now, but I talked to somebody today who has a lot of experience building computers and has an unbiased opinion on the matter, who suggested going with atleast a 750-800W PSU instead of the current 600W I was planning to roll with, since I said I want to OC my gpu and cpu at some point, and maybe even crossfire somewhere down the road. I'd like to not spend more than $20 more on the new PSU than this one (up to $100), and I'd love a modular PSU as well.

Can somebody suggest a good PSU for my need? I'm currently looking at a Corsair, modular, 750W for $90, with a $10 mail in rebate bringing it down to $80, which seems an insanely good price (http://microcenter.com/product/406089/CX_Series_CX750M_750_Watt_ATX_Modular_Power_Supply), and it's in store at my local microcenter so I could pick it up in person rather than waiting on one to ship.

Would anybody have any reservations about this particular psu?
 
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ko888


I was responding to your original post where you did link to the 600W version.

The Corsair Enthusiast Series Modular TX750M (CP-9020003-NA), with its maximum combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two Radeon HD 7950 graphics cards in 2-way CrossFireX mode.

The OCZ Fatal1ty Series 750W...
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bluelobster

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I'm not really sure what the point of going for a higher-end PSU, say the TX corsair series is. The cx750m is modular, high-capacity (750W), crossfire ready, 12v rail, and it costs $80.

Would this not be a good choice for OC a i7-3770k and sapphire radeon 7950? Is crossfire with this thing a bad idea? I don't see why I would spend more money, reviews on this one seem really good on newegg and amazon.
 
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toyftw

toyftw

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Hi unbiased opinion or not - your system doesn't require anywhere near 750-800w.
realhardtech (their expertise suggests a quality 500w PSU for a sys with one 7950;
http://www.realhardtechx.com/index_archivos/Page362.htm

What I suggest is you go for the most quality psu you can afford in the 500-650w
range which will give you a lot of spare headroom. A couple excellent ones to consider:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013 nets to $60 and more than you need

http://www.newegg.com/Product/Product.aspx?Item=N82E16817121094 nets to $85 - platinum

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182263 nets to $75 - 650w

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005 nets to $60 - ex value 650w

None of those are budget/opening price point series, they are enthusiast level or higher.
The benefit to stepping up is better internal parts, tighter tolerances, more rigid QC,
and usually better warranty.
 
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bluelobster

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This sounds great, and that was my thinking behind the 600W I'm working with at the moment, but I plan on OC quite a bit and possibly adding an additional gpu down the road. Maybe the 600W is enough for this, but I'd really like to be careful when OC'ing. Newegg's number 1 tip for building a pc is not to skimp on the power.

I'd like my rig to have as much longevity as possible, and I'd way rather invest in a more capable PSU now than have to buy a better one down the road. Are you sure a 500-650w would cut it for a lot of OC and being future proof?
 
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Thanatos Telos

Thanatos Telos

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It won't cut it for Crossfire, but it will for an OC.
 
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toyftw

toyftw

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Quite sure the four I listed will handle the OC ing without issue, two of the links and
the best price/value are the 650's. However, you just mentioned you are thinking of adding
another 7950, if your are going to run 2 7950's, then yes you should consider a quality
750w unit. However, thosr four I linked above are fine for one 7950 plus OC.
 
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bluelobster

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Mar 30, 2013
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Alright thanks, I really appreciate it.

How do the cx750m (http://microcenter.com/product/406089/CX_Series_CX750M_750_Watt_ATX_Modular_Power_Supply), tx750m (http://microcenter.com/product/365787/Enthusiast_Series_TX750M_750_Watt_High_Performance_Modular_ATX_Power_Supply), or ocz 750 fatal1ty modular (http://microcenter.com/product/335913/750_Watt_Fatal1ty_Series_Modular_ATX_Power_Supply) look?

I pick these ones in particular because I'm hoping on picking one up in store at microcenter as I need to pick up my cpu there anyway, save me from waiting on shipping. These 3 seem to be decent. The OCZ in particular, with 4 +12v rails, which I've heard is one of the most important factors in a psu.
 
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ko888

ko888

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For a system using two AMD reference design Radeon HD 7950 graphics cards in 2-way CrossFire mode 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 45 Amps or greater and have at least four 6-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) 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. If your CPU overclock is going to be above 4.5 GHz and the graphics cards are also going to be overclocked then definitely get the 750W PSU.

The Corsair CX Series Modular CX750M (SKU# 75-002019 / CP-9020061), with its maximum combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two Radeon HD 7950 graphics cards in 2-way CrossFireX mode.

The OCZ ModXStream Pro Series 600W (OCZ600MXSP), with its maximum combined +12 Volt continuous current rating of 42 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is insufficient to power your system configuration with two Radeon HD 7950 graphics cards in 2-way CrossFireX mode.
 
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bluelobster

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Mar 30, 2013
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Awesome thanks, though that OCZ wasn't the one I linked. I guess if the Corsair is sufficient that's enough for me for crossfire and oc, though the OCZ has 4 +12v rails which seems appealing and a 5 year warranty (vs 3) for $10 more.
 
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ko888

ko888

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I was responding to your original post where you did link to the 600W version.

The Corsair Enthusiast Series Modular TX750M (CP-9020003-NA), with its maximum combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two Radeon HD 7950 graphics cards in 2-way CrossFireX mode.

The OCZ Fatal1ty Series 750W (OCZ750FTY), with its maximum combined +12 Volt continuous current rating of 54 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two Radeon HD 7950 graphics cards in 2-way CrossFireX mode.

The TX750M would be the one I would recommend, based on its electrical capacity and quality, since that is what you buy a power supply for. It also has a 5 Year warranty.
 
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bluelobster

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Ah, right sorry. Thanks for your answer!
 
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David Berry

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Apr 13, 2013
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hi im not sure if you have a maplins shop in the us but they sell a 850w power suply called a G7. it might not have a fash brand name like corsair but i can tell you it takes everything you can trow at it and and only cost around 76 dollars and my pc is quite high speck. and i have no complaints about it at all very good suply for the money and every one knows your just paying for the brand name as the components all come from somewhere in china or Thailand and i think i should know as i use to work for an electronics company that made military radios. you juss pay loads for the flash box they put the parts in. hope this helps.
 
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toyftw

toyftw

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TROLLING!

 
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