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A good psu to run gtx 570 and a i5 2500k cpu overclocked to 4.5ghz

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July 25, 2011 9:34:20 AM

my board is msi p67a-c45,i5 2500k processor overclocked to 4.5 ghz and i buyed a factory overclocked gtx 570 from msi..and i also overclocked my ram is corsair vengeance 1600mhz 4gb..currently my psu is corsair hx 750w is this psu a good psu for this setup
a b ) Power supply
July 25, 2011 9:54:36 AM

yeah your PSU is good and very very enough for your system + OC , power consumption GTX570 fulload arround 350W
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July 25, 2011 11:57:45 AM

+1
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a c 271 ) Power supply
July 25, 2011 1:18:13 PM

The HX 750 would be fine to add another GTX 570 onto with OCing, you have plenty of power left to use for OCing your current setup.
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July 25, 2011 2:14:05 PM

hunter315 said:
The HX 750 would be fine to add another GTX 570 onto with OCing, you have plenty of power left to use for OCing your current setup.

are u sure ..coz in nvidia forums they told that i need a 1000w psu for sli"ing a gtx 570 card if my i5 2500k processor is oc'd to 4.5ghz
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a b ) Power supply
July 25, 2011 2:31:16 PM

vishalaestro said:
are u sure ..coz in nvidia forums they told that i need a 1000w psu for sli"ing a gtx 570 card if my i5 2500k processor is oc'd to 4.5ghz

800w should ok in my books.

And remember what Nvidia states is for the variant of PSU.In other words the variant means that they dont know how good or bad your psu is but just in case they would rather rate it high in order to avoid disaster or damage to your components
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July 25, 2011 2:44:55 PM

A lot of times people go overkill on PSU's just for a bit of extra safety (and the fact that most people don't know how much is required and would rather have more). I have seen 1000W PSU's for i3 builds before, which is obviously overkill.

You will have ample room in your PSU to run a 570 and your i5 2500k.
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July 25, 2011 2:59:42 PM

so a 750w will be enough for a gtx 570 in sli..right pls say yes or no
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a b ) Power supply
July 25, 2011 3:04:18 PM

vishalaestro said:
so a 750w will be enough for a gtx 570 in sli..right pls say yes or no

Even though i fail to agree with Hunter i would say the 800w to 850w should be able to do your pc ok.

Remember my recommendation is that you need a good psu which is rated 800w not those generic ones.
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a b ) Power supply
July 25, 2011 3:20:05 PM

Not Enough for it .. in your question first post, you don't ever mention SLI, and Now if you want to ran SLI , Power needed 850 above, the power consumption of SLI from reviewer around 550W , and you plan OC cpu + gpu maybe .. Hmm :) 
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July 25, 2011 4:06:37 PM

for a ati 6950 is 750w psu is enough for a crossfire
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a b ) Power supply
July 25, 2011 5:01:48 PM

The power for hd6950 CF is 470 ( fulload ) idle at 169W , if your system alway's ran idle , and working not bellow 80% .. Enough , and don't think about OC
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a c 271 ) Power supply
July 25, 2011 8:34:17 PM

Im quite sure,
http://www.tomshardware.com/reviews/crossfire-sli-3-way...


As you can see from there the wattage at the wall is only 556W which means they were only pulling up to about 500W from the PSU, well below the limit of the 750HX, Hardware secrets was able to pull over 900W from it sustained at high temps and have it stay in spec, 500W isnt excessive load for a 750HX, it isnt even moderate load, if you were getting a new unit i would suggest grabbing an 850W for two of them for some extra overhead but you already have a great PSU that can do it, its a bit tighter than an 850W would be but still more than capable of handling 2 GTX 570s, even if you OC your system pretty good, so there isnt a reason to buy another PSU that isnt going to be significantly better or more powerful, its just going to cost you additional money.
http://www.hardwaresecrets.com/article/Corsair-HX750W-P...
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a c 87 ) Power supply
July 25, 2011 8:55:16 PM

In case it needs to be spelled out any more explicitly than hunter already has done; these types of PSUs are designed to be run at their stated wattage for extended periods of time (provided they are kept in temps below their maximum temp rating - not that they can't do so even then, but can't be taken for granted).

And a 500W load is an absolute worst case scenario that is unlikely to be reached frequently, if ever. Unless you are running furmark or folding etc.
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July 25, 2011 10:04:27 PM

I am running Corsair Gaming Series 800w with that same system, just a different motherboard. And morreee than enough. Not sure about sli. Can anyone tell me if my psu is enough for gtx 570 sli? Someone above said no, but im jw for other opinions or facts.
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a b ) Power supply
July 26, 2011 4:29:14 AM

^yes, 6950 uses less power than a gtx570
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July 26, 2011 4:33:01 AM

so okay i have decided to add a ati 6950 in crossfire with my 750w psu..i have to choose my motherboard Gigabyte GA-P67A-UD4 vs msi p67a-gd65 which is best among these..they say that gigabyte usb 3 speeds are higher than the normal usb 3 speeds because of their gigabyte boost performance ..
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a b ) Power supply
July 26, 2011 8:09:32 AM

hunter315 said:
Im quite sure,
http://www.tomshardware.com/reviews/crossfire-sli-3-way...
http://media.bestofmicro.com/G/P/281833/original/image028.png

As you can see from there the wattage at the wall is only 556W which means they were only pulling up to about 500W from the PSU, well below the limit of the 750HX, Hardware secrets was able to pull over 900W from it sustained at high temps and have it stay in spec, 500W isnt excessive load for a 750HX, it isnt even moderate load, if you were getting a new unit i would suggest grabbing an 850W for two of them for some extra overhead but you already have a great PSU that can do it, its a bit tighter than an 850W would be but still more than capable of handling 2 GTX 570s, even if you OC your system pretty good, so there isnt a reason to buy another PSU that isnt going to be significantly better or more powerful, its just going to cost you additional money.
http://www.hardwaresecrets.com/article/Corsair-HX750W-P...

Guess i was wrong.
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a b ) Power supply
July 26, 2011 8:11:00 AM

Aquire_assisstance said:
I am running Corsair Gaming Series 800w with that same system, just a different motherboard. And morreee than enough. Not sure about sli. Can anyone tell me if my psu is enough for gtx 570 sli? Someone above said no, but im jw for other opinions or facts.

You could start your own thread.We would gladly answer.
the rules state no hijacking threads.
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a c 271 ) Power supply
July 26, 2011 1:24:52 PM

They can say that they improve USB 3.0 performance with their special boost tech, its not going to make a difference, most of your speed limitation is coming from the attached device and not from the USB 3.0 standard, at 5Gb/s its faster than a SATA II cable which means that no standard external hard drive hooked up to it could saturate it, it would take a super fast flash drive. So regardless of if their tech does or doesnt actually speed up USB 3.0, it doesnt matter since you arent being limited by the USB.

@Ghnader - Nothing wrong with being wrong, thats how we learn and thats why i provide links ;) 
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July 26, 2011 3:58:42 PM

iam2thecrowe said:
http://www.guru3d.com/article/geforce-gtx-570-sli-revie... < they reccomend a 750w unit for that setup. so your fine.

im confused which to buy a 6950 or a gtx 560ti ..which is best at direct 11 tesselation..i guess that absence of physx will not affects gpus performance..for dx 11 tesselation which is best among these 6950 or a gtx 560ti
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July 26, 2011 4:04:42 PM

hunter315 said:
They can say that they improve USB 3.0 performance with their special boost tech, its not going to make a difference, most of your speed limitation is coming from the attached device and not from the USB 3.0 standard, at 5Gb/s its faster than a SATA II cable which means that no standard external hard drive hooked up to it could saturate it, it would take a super fast flash drive. So regardless of if their tech does or doesnt actually speed up USB 3.0, it doesnt matter since you arent being limited by the USB.

@Ghnader - Nothing wrong with being wrong, thats how we learn and thats why i provide links ;) 

which is best among these board gigabyte P67A-UD4 vs MSI P67A-GD65 just say which is best among these
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a b ) Power supply
July 28, 2011 8:56:50 AM

vishalaestro said:
so okay i have decided to add a ati 6950 in crossfire with my 750w psu..i have to choose my motherboard Gigabyte GA-P67A-UD4 vs msi p67a-gd65 which is best among these..they say that gigabyte usb 3 speeds are higher than the normal usb 3 speeds because of their gigabyte boost performance ..



The 6950 wont provide as much performance as the 570, even a 560Ti will out perform at 6950 and both have lots of overclock potential.
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July 28, 2011 11:15:18 AM

Best answer selected by vishalaestro.
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a b ) Power supply
July 28, 2011 4:06:29 PM

This topic has been closed by Mousemonkey
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