430W power supply good enough for 5870?

Discussion in 'Videocards - AMD Radeon' started by tukm, Dec 6, 2009.

  1. tukm

    tukm Member Guru

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    Ok, so I know theres a lot of power supply freaks out there that think they need 1000w power supply for everything but I am looking for someone with practical experience. Right now I have an antec (made by seasonic) 430W power supply and it can run my 8800gtx/core2duo e6600 fine for years now. I dont have a lot of stuff. Just 2GB ram and 2 hardrive and dvd-rw. Nothing fancy so I don't think i am using a lot of power. Do you guys think I can switch my 8800GTX to a 5870 without having to buy a new power supply?
     
  2. Renegade8100

    Renegade8100 Ancient Guru

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    no? the wattage requirements are over-rated but not THAT over rated..
     
  3. scoter man1

    scoter man1 Ancient Guru

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    NO! You'd have to be smoking a joint to think that would run! You would want to go with at LEAST 750w I would hit around 850w if it were me. I ran my current setup on a 530w. I fried the mobo and the gpu. Its your choice if you want to burn expensive stuff and have to deal with rma's, but I highly reccomend over buying then under buying because your just gonna end up spending more in the long run.
     
  4. tukm

    tukm Member Guru

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    first off, I am not going to listen to anyone saying "at LEAST 750W"...especially when the minimum requirement from ATI is 500W. Reason I don't believe all this because 8800gtx minimum requirement is 450W but my 430W is more than enough. When 8800gtx was out a lot of people think they needed like 600W+ for it and laugh at my 430W but its worked out fine for years.
     
    Last edited: Dec 6, 2009

  5. Sever

    Sever Ancient Guru

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    according to most power usage benchmarks, power can fluctuate up to 450w usage on a 5870, however, most benchies use quad core processors which use more power.

    i would recommend you get a 550w-650w psu at the very least, as if you get a psu with a lower power rating than this, you would be running the psu at close to full loads, which will cause increase temps for the internal components of the psu and may stress it to the point of instability.

    look around for a corsair 620w as that would leave some breathing room as well. however, if you want futureproof, the apevia 900w warlock is priced similarly to the corsair 620w, and it would only run at 40-60% load with the setup in question, which means less stress, a little more stability (not much more stable as corsair are generally good), and a fair bit more breathing room.

    a 750w psu would not be needed as you are running a dual core processor, which does not demand significant amounts of power, even when it peaks. so its just up to you whether you want a psu that can handle the setup in question, or something that provides a bit more futureproofing.
     
  6. Despoiler

    Despoiler Master Guru

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  7. Dahbob

    Dahbob Member Guru

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    430W is enough if you got enough amperage on it (I had 430W antec on my 4870X2 and it was enough, it WILL power up 5870), I upgraded mine because of better connectors, had to make 8pin cable from 2x 6pin wich I made from 4x molex, it was just too much.
     
  8. Jcazz

    Jcazz Master Guru

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    Your computer is too slow, your memory is not enough and to slow, your power supply if it was a 500 would work, but everything else in ur computer is umm well, old.
     
  9. DSK

    DSK Banned

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    You could try it and see how you get on i guess

    but a decent 600w i would recommend.
     
  10. 3T3RN4L

    3T3RN4L Master Guru

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    i agree about smoking something if he thinks 430w be strong enough but needing a 750w is exaggeration a bit.

    600-650 even a 550w be fine if from a high qauilty maker(antec,corsair,ect.)

    also op i suggest 2 more gigs of ram too.you'll see a performance boost going from 2 to 4 gigs,even going from 2 to 3gbs will increase overall performance especially with a high powered gpu such as the 5870. it gives the gpu and other parts some extra room to stretch cause the os does use atleast 1gb of system memory
     
    Last edited: Dec 6, 2009

  11. BlueDragon

    BlueDragon Member Guru

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    Give this a go its free PSU calculator link:http://extreme.outervision.com/psucalculatorlite.jsp

    Its pretty good if you pay $1.99 you get 3days use and it tells you the AMPS it will take.
     
  12. FULMTL

    FULMTL Ancient Guru

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  13. chuck216

    chuck216 Active Member

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    Sorry but that power supply would have a difficult time running a 4870, let alone a 5870. It might run ok for everyday web browsing, maybe even light gaming. but the second you put heavy stress on the GPU it will overload one of those 12 volt rails. 17 Amps per rail simply isn't enough.
     
  14. tukm

    tukm Member Guru

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    Ok so I think total watt-wise, 430W is enough but the AMPs on the 12v is not. I am going to get a Corsair 650watt HX modular. has 52A on v12. That should be plenty and future proof.
     
  15. Jcazz

    Jcazz Master Guru

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    he is better off just buying a strong psu over 800watt....Then upgrade his computer, Then buy whatever good vidcard he can. A p4 is not going to do justice with any new card. I did a single 9800GTX in a Athlon64 3200+ computer with 2gigs ram.

    To get to the point, it ran everygame like crap...@ resoloutions not much more than 1024x768/1280x1024. blah......

    Sure older games will do ok. but anything after 2007 and u are gonna start seeing lame performance with that setup.
     
    Last edited: Dec 6, 2009

  16. DSK

    DSK Banned

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    Hes currently got a 8800gtx and e6600
     
  17. MaxBlade

    MaxBlade Master Guru

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    Like the rest NO..I would get 700+.
     
  18. Undying

    Undying Ancient Guru

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    Hehe i love when ppl say "you need atleast 750-800W" xD
     
  19. John Dolan

    John Dolan Ancient Guru

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    Guru review says
    The card requires you to have a 500 Watt power supply unit at minimum if you use it in a high-end system. That power supply needs to have (in total accumulated) at least 40 Amps available on the +12 volts rails.
     
  20. gerardfraser

    gerardfraser Ancient Guru

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