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PSU Questions

Discussion in 'General Hardware' started by magibeg, Mar 5, 2007.

  1. magibeg

    magibeg

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    Ok so i'm still planning out my new system (waiting for the R600 release) and it occured to me, i might not have enough power. The plan now is to get a e6400 and overclock it to around 3.2ghz 24/7. Also i plan on doing either crossfire or SLI (depending on which is better) and i was looking around the level of the x2800xt or 8800gts where i buy one card now and one later. Think this would be enough power?

    http://www.ncix.com/products/index.php?sku=21597&vpn=OCZ850GXSSLI&manufacture=OCZ Technology
     
  2. niko084

    niko084

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    Yup it will be just fine.
    Being you have dedicated rails to your pci-e plugs your good to go, an 8800 will only draw 5.5amps off that plug and you provide with a cap of 20 amps, your chip wont eat half of its rail, and you have 20 left over for mobo, your more than good to go.

    Just don't run 10 hard drives, and 32 neon light tubes, and 6 dvd-rws at once.
     
  3. magibeg

    magibeg

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    Well there goes my master plan of running 25 terrabytes of hd space ;). I'm more worried for the fact that if i go the ati route with talks of a single card using 300 watts its scaring me :p. Because i want to eventually go with dual cards. I was hoping a rail per card would be fine with another rail for the cpu, with 1 rail doing nothing.
     
  4. WarEagleAU

    WarEagleAU Bird of Prey

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    Very good choice on the PSU. I was expecting to see you post a link to the PC Power and Cooling Quad 750 :) A good PSU choice in my opinion.
     
  5. magibeg

    magibeg

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    Well i thought about that one but its an extra $70 or so and unfortunately i'm not made of money yet and i heard that ocz ps was pretty good too. I just think it would be a nightmare if down the road i find out my 850watt psu cant handle either 2x 8800gts or 2x x2800xt (the ati side of the deal looks kinda sketchy to me at this point)
     
  6. WarEagleAU

    WarEagleAU Bird of Prey

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    That one should handle it with APLOMB. OCZ made a good splash into the PSU waters and is more than holding its own. 70 bucks more isnt too shabby. I expected it to be around 100 more.
     
  7. niko084

    niko084

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    I highly doubt the real power requirement of the ATI card will in the end be 300 watts, that is 25amps... The 8800s only draw 11, 5.5 from the plug 5.5 from the port max.
     
  8. magibeg

    magibeg

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    Thanks for that bit of info, i feel a lot more comfortable about it now, i just keep hearing these reports about all these power hungry cards and its scaring me :p. In reality the ocz pus will give about 50-60amps which should hopefully be plenty then. Thanks all.
     
  9. niko084

    niko084

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    Ya I mean they may say it during testing, but sooner or later they are going to get into a battle about having to pass emissions on computers simply because of the power draw.. If that was true about 300 watts, we are talking about 25amps @ 12volts, you would need a 10-gauge 12volt power cable to hold that, thats about 1/4" thick, we are talking about small car amplifier power cable here, also only a small handful of power supplies *single* made today would handle even 1 card let alone 2.

    See what it comes out at I wouldn't expect to see more than 150watts.
     
  10. Tatty_One

    Tatty_One Senior Moderator Staff Member

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    You should not have any problems as others have said, if you wanted to be safe you could get the Thermaltake 250W dual rail SLi drive bay PSU, I have it in my specs, I bought it because I have a fairly cheap 600W single rail PSU that with huge CPU and Gfx overclocks was becoming unstable, I got this baby for £25 which was a whole lot cheaper than buying an expensive high quality 600W+ PSU and now that the cheapo isnt powering the Gfx card the system in nicely stable.
     

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