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4870+4870X2 PSU Recommendation?

Discussion in 'AMD / ATI' started by DavyGT, Jul 15, 2008.

  1. DavyGT Guest

    I'm thinking of getting a 4870 and a 4870 X2 so I can run a CrossFireX setup. I was wondering if a ~700W-800W PSU would be enough? I was also wondering if I should buy it now, with the heat problems or wait until the 45nm refresh. My case doesn't have the best ventilation...
     
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  2. ShadowFold

    ShadowFold New Member

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  3. DavyGT Guest

    Ok, I just got my new motherboard. Thanks, I'll get the upgrades ASAP.
     
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  4. MatTheCat New Member

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    Why a 4870 and a 4870x2?

    Strange choice....why not 4870 CF or just 4870x2?
     
  5. DavyGT Guest

    Why not? Get the very best possible for the most of my money. It depends on how well 3x4870s scale compared to 2.
     
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  6. ShadowFold

    ShadowFold New Member

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    4870X2 + 4870 would be killer.. If I had the money and the mobo I would do it :p
     
  7. purecain

    purecain

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    i agree, should be fun testing that system...:toast:
     
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  8. Megasty New Member

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    Buy now & buy often :D Also, don't buy into AMD mearly shrinking these things. They won't. The next set of cards won't come out for another 6 months or so & they will pwn all when compared to these. However, these boys are already overkill. The way the 4870x2 is shaping up, you'll only need it by itself to max out everything. But I'm not going to be saving any cash on these cards anytime soon either.
     
  9. t_ski

    t_ski Former Staff

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    You need to go to the AMD site and look up PSU recommendations. IIRC dual 4870's require at least a 750W PSU. Check it out here:

    http://game.amd.com/us-en/crossfirex_components.aspx?p=3#ATI Radeon™ HD 4870

    Obviously, since the 4870X2's are not released yet, you won't find any info there on that card. When it shows up in the next month, I would say split the difference between dual 4870X2's and dual 4870's, then buy a PSU at least that big.
     
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  10. MatTheCat New Member

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    1 ) Providing the rest of your system is decent a lone 4870 will max out all modern titles except Crysis and a few other poorly optimised numbers such as Gothic 3 etc...

    2) From what I have read, more than 2 way Crossfire is pointless and yields no real benefits.

    If I were you, I would either go 2* 4870 CF (if you already have a 4870) or if you dont, just wait until 4870 X2 comes out and go with that......Also, have you read up on the issues with microstutter and multi GPU solutions.......certainly put me right off persuading me to stick with single GPU solution.
     
  11. Scrizz

    Scrizz

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    I thought micro stutter was supposed to be fixed in the Hd4870X2
     
  12. Megasty New Member

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    With cat 8.5, I didn't have any microstuttering with the 3870x2. The problem with the 4870x2 is suppose to be completely taken care of.
     
  13. t_ski

    t_ski Former Staff

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  14. ShadowFold

    ShadowFold New Member

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    From what ive seen, most games start not getting any performance at all with 4 cards. 1 card = 100%, 2 cards = 180%, 3 cards = 230% and 4 cards = 230%.
     
  15. Wile E

    Wile E Power User

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    You can't go by that. They are taking into consideration the crappy psu's that some manufacturers release. A top of the line 700W would be fine. Although, a top of the line 750W+ would be even better. lol.
     
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  16. Hayder_Master

    Hayder_Master

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    take only the 4870x2
     
  17. Tatty_One

    Tatty_One Super Moderator Staff Member

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    I am sure I read that a 4870x2 requires a minimum of 600W but of course thats based on a fairly standard setup, if you have lots of bits of metal in the case it might well need more.
     
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  18. john.l New Member

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    yestarday i buy the zalman ZM1000-HP for the same configuration of cards (im waiting for x2 release) because cpu hard discs in raid and memory needs also power. dont forget the efficiency of the psu
     
  19. yogurt_21

    yogurt_21

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    lol according to that chart form amd you need a good brand 1200w to run trifire 4870's personally I'd go for a good brands kilowatt to be safe with ocing. if you don't plan on ocing, then a good brand 750w+ will do.
     
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