7870 LE on Corsair 430w PSU

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.
19 answers Last reply
More about 7870 corsair 430w
  1. I wouldn't do that.
  2. 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.
  3. 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?
  4. as long as there are 35 amps on the 12v rail it will work.
  5. eyeage said:
    as long as there are 35 amps on the 12v rail it will work.


    Oops, my link didn't work. This is the psu.

    And this is the gpu.
  6. Not quiet enough, really. You could push it, but it wouldn't last too long I wouldn't imagine.
  7. 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.
  8. Anyone else?
  9. 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.
  10. Maximum tdp of the card is 185W : http://www.techpowerup.com/gpudb/b814/PowerColor_HD_7870_MYST._Edition.html

    Here's an e.g of total system power at full load with the card :
    http://www.hardocp.com/images/articles/135702895623mx2qRamo_10_1.png

    So you might get by, but a 500W psu is recommended.
  11. 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-7870-review-his-7870-iceq-turbo-powercolor-pcs-hd7870/4
  12. Thanks bucknutty, on pcpartpicker it says my recommended wattage is 330w, I don't know how accurate that is though.

    http://pcpartpicker.com/p/CZ02
  13. Thanks bucknutty, on pcpartpicker it says my recommended wattage is 330w, I don't know how accurate that is though.

    http://pcpartpicker.com/p/CZ02
  14. 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/135702895623mx2qRamo_10_1.png

    It's about that.
  15. 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/135702895623mx2qRamo_10_1.png

    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.
  16. I'd use pcpartpicker. It's the most accurate one I've found.
  17. 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.
  18. 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.
  19. 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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