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7870 LE on Corsair 430w PSU

Last response: in Systems
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February 11, 2013 6:03:30 AM

I bought this corsair psu last month during a shell shocker.

http://www.newegg.com/Product/Prod [...] 6817139049

Then I was going to buy a graphics card, but one of my required textbooks was $250 and I couldn't find the pdf to torrent :(  so I had to buy it.

I was originally going to buy a 7850 but this 7870 le/7930 caught my attention.

http://www.newegg.com/Product/Prod [...] 6814131484

I plan on buying a i5 3570(unless they announce those haswell cpus soon) and I don't plan on OCing it.

More about : 7870 corsair 430w psu

February 11, 2013 6:18:40 AM

I wouldn't do that.
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February 11, 2013 6:21:25 AM

Based on some very technical reviews, you could run the two OC'd with that PSU, but you'd be cutting it close. Might be, buy it, run it, buy a new PSU, OC after.
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February 11, 2013 6:25:24 AM

eyeage said:
Based on some very technical reviews, you could run the two OC'd with that PSU, but you'd be cutting it close. Might be, buy it, run it, buy a new PSU, OC after.


So if I don't plan on OCing at all, it would be good?
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February 11, 2013 6:27:06 AM

as long as there are 35 amps on the 12v rail it will work.
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February 11, 2013 7:45:11 AM

Not quiet enough, really. You could push it, but it wouldn't last too long I wouldn't imagine.
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February 11, 2013 7:49:13 AM

eyeage said:
Not quiet enough, really. You could push it, but it wouldn't last too long I wouldn't imagine.


I see, I may just go with a 7850 then.
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February 11, 2013 4:22:58 PM

Anyone else?
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a b U Graphics card
February 11, 2013 4:43:39 PM

A regualr 7870 can pull upto 175 watts according to GPUreveiw.com.
The i5 3570 draws 77 watts.
Lets add in 50 for ram board and drives.
Thats about 302 watts on the 12 volt rail.
Lets take 305watts /12volts = 26 amps.

The link does not work, but as long as the corsar is good for 305 watts or 26 amps on the 12volt rail your good.

Also keep in mind the calculations I did are estimations based on max usage. I bet your actaul usage will be lower.
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a b U Graphics card
February 11, 2013 4:54:20 PM

In this article we see a couple of different 7870 paired with an Intel Core i7-3960X. That is a 130 watt CPU.

The whole computer pulled about 330 from the wall. You can subtract 50 from that to put you at a max draw of around 280. Again check the lable on the PSU. Some times it will give a rating for the combined 12 volt draw, but more commonly it lists the 12 volt amps.

http://www.anandtech.com/show/5691/the-retail-radeon-hd...
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February 12, 2013 2:36:48 AM

djangoringo said:
It's more or less than that, it's not totally accurate, but as you can see from here : http://www.hardocp.com/images/articles/135702895623mx2q...

It's about that.


Been a while since I've built a computer and I forgot all about those PSU calculators, I'm going to input my parts into like 5 different psu calculators and see what they say.
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February 12, 2013 1:54:38 PM

I'd use pcpartpicker. It's the most accurate one I've found.
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February 12, 2013 3:42:40 PM

eyeage said:
I'd use pcpartpicker. It's the most accurate one I've found.


I looked through a bunch of them and most of them are saying under 400w.
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February 12, 2013 4:44:19 PM

UCLAco2016 said:
I looked through a bunch of them and most of them are saying under 400w.


Yep, and if you don't overclock that psu will be enough, like I said. However, if you DO overclock, it will obviously draw more power. Even then, you might get by, but you'd be pushing it. 35a on 12v rail will supply ample power for an OC.
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February 12, 2013 11:14:14 PM

eyeage said:
Yep, and if you don't overclock that psu will be enough, like I said. However, if you DO overclock, it will obviously draw more power. Even then, you might get by, but you'd be pushing it. 35a on 12v rail will supply ample power for an OC.



Ahh I see, I appreciate the help.
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