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What size psu for this build

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July 19, 2012 9:51:45 PM

I am planning on building a new pc. The specs are:
Zalman Z11 plus
intel i5 3570k
asrock z77 extreme 4
corsair vengenance 8gb ram
Evga geforce gtx 560 superclocked 1 gb version
1tb western digital 7200rpm hdd
windows 7 ultimate 64-bit
so i am wondering what size psu i would need for this build i am planning on using the corsair cx series of psu's
Thanks in advance.

More about : size psu build

July 19, 2012 9:57:55 PM

corsair CX600 would be all that you need
July 19, 2012 10:27:22 PM

Agreed. Even 600w would be overkill.
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July 19, 2012 10:29:32 PM

teh_chem said:
Agreed. Even 600w would be overkill.

true the 560 only uses 175w of power
July 20, 2012 9:06:48 AM

ok cool thanks i probably get the 600w just to be sure.
Thanks guys for the help :) 
July 20, 2012 9:17:33 AM

I agree that 600W is all you need.

Can I ask why you'v picked Windows 7 Ultimate? Its significantly more expensive than Home Premium and its extra features are pointless for most users. If you went down to Home Premium, you might even be able to afford a 560Ti or HD7850.
July 20, 2012 10:52:03 AM

You invested in a motherboard with SLI capability so buying a PSU which would eliminate that option seems unwise. And are we taking 560 or 560 Ti ?

http://www.geforce.com/hardware/desktop-gpus/geforce-gt...
Maximum Graphics Card Power (W) 150 W
Minimum System Power Requirement (W) 450 W

That's 600 in SLI for the 560 in SLI

http://www.geforce.com/hardware/desktop-gpus/geforce-gt...
Maximum Graphics Card Power (W) 170 W
Minimum System Power Requirement (W) 500 W

And 670 watts for the TI in SLI

================================

I don't see the point in buying anything less than 600/650 watts as there's no real cost savings below that level among quality units. Also note that it's not only about having enough power so that nothing blows up ...... when overclocking, it's about have low ripple and rock stable voltages at yoiur power draw. And if ya look at the reviews, you'll see that both start to slip the closer you get to a PSU's full power rating. Not to mention, PSU's hit peak efficiency at 50% load.

Unless you are sure you will never add that 2nd GFX card in the future, I'd use a 750 watter if using the GFX cards as the come factory overclocked "outta the box", if you gonna overclock 560 Ti's further than the factory OC, I'd use an 850 watter.

On a side note, I'd strongly advise against the EVGA ..... the EVGA factory overclocks are just that.....the speed is tweaked but there's been no real modification if the reference card. It still has the reference PCB and reference 4 phase VRM. If you are going to buy a factory OC'd card, Look at the EVGA Classified model, Asus DCII TOP, Gigabyte etc all of which have 7 or more phase VRM's, capable of handling additional overclocking.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
July 20, 2012 12:04:50 PM

JackNaylorPE said:
You invested in a motherboard with SLI capability so buying a PSU which would eliminate that option seems unwise. And are we taking 560 or 560 Ti ?

http://www.geforce.com/hardware/desktop-gpus/geforce-gt...
Maximum Graphics Card Power (W) 150 W
Minimum System Power Requirement (W) 450 W

That's 600 in SLI for the 560 in SLI

http://www.geforce.com/hardware/desktop-gpus/geforce-gt...
Maximum Graphics Card Power (W) 170 W
Minimum System Power Requirement (W) 500 W

And 670 watts for the TI in SLI

================================

I don't see the point in buying anything less than 600/650 watts as there's no real cost savings below that level among quality units. Also note that it's not only about having enough power so that nothing blows up ...... when overclocking, it's about have low ripple and rock stable voltages at yoiur power draw. And if ya look at the reviews, you'll see that both start to slip the closer you get to a PSU's full power rating. Not to mention, PSU's hit peak efficiency at 50% load.

Unless you are sure you will never add that 2nd GFX card in the future, I'd use a 750 watter if using the GFX cards as the come factory overclocked "outta the box", if you gonna overclock 560 Ti's further than the factory OC, I'd use an 850 watter.


I think a quality 600w/650w PSU would still be just fine if they wanted to SLI two 560's. guru3d and anandtech did a review of the gtx560 in sli and determined that both cards totaled just around 300w power draw in furmark load testing (furmark generally stresses far more than gaming, so this would typically represent a "worst case" scenario for power draw--generally even the most stressful gaming conditions use up to 100w less draw in SLI vs. furmark tests). Of course that doesn't address potential overclocking. So even adding other system components at load, you're still probably going to be around 500w/550w total draw under load conditions with two cards and a hefty CPU (IIRC, the benchmarks were done with an i7-920, don't know if the CPU was overclocked).

600w would be adequate for SLI (more than enough unless you want to benchmark all day long with furmark), 650w would give a bit more breathing room. Anything more would mostly be a waste of money.
July 29, 2012 7:14:27 PM

manofchalk said:
I agree that 600W is all you need.

Can I ask why you'v picked Windows 7 Ultimate? Its significantly more expensive than Home Premium and its extra features are pointless for most users. If you went down to Home Premium, you might even be able to afford a 560Ti or HD7850.

I have a msdn supscription :) 
!