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Does the Dell 4700 stock power supply have dual 12v rails?

By AhrenBa
Jul 27, 2006
  1. mailpup

    mailpup TS Special Forces Posts: 6,979   +362

    Yes, you are correct.
     
  2. AhrenBa

    AhrenBa TS Rookie Topic Starter Posts: 25

    Wow, thats amazing. Dell uses a dual rail power supply.....something that actually has good use! lol
     
  3. dmill89

    dmill89 TS Guru Posts: 475

    that PSU is the 305W HIPRO model HP-P3087F3 which is also a standard non-propritary ATX PSU Gateway and HP also use this powersupply in some of there systems. It's one of the better OEM PSUs.
     
  4. AhrenBa

    AhrenBa TS Rookie Topic Starter Posts: 25

    Sweet! Thats great, I was hoping it was standard ATX. Do you think a 7600gt could run ok on this PSU? Thanks
     
  5. dmill89

    dmill89 TS Guru Posts: 475

    What are your current system specs CPU,RAM Drives,etc
     
  6. AhrenBa

    AhrenBa TS Rookie Topic Starter Posts: 25

    I have a 2.8ghz P4 Prescott, 1 CD-RW, 1 SATA hard drive, a modem PCI card, 2 DDR2 Ram sticks, and a system fan
     
  7. dmill89

    dmill89 TS Guru Posts: 475

    Yes the extreme PSU calculator avalible here http://www.extreme.outervision.com/psucalculator.jsp
    comes up with 240W for that config with a 7600gt so you should have plenty of wattage to spare
     
  8. AhrenBa

    AhrenBa TS Rookie Topic Starter Posts: 25

    Nice, I have used that calculator before, but when I configured in the Surge Compensation, and Capacitor Aging, it put it over the top. Its in the footnotes, I used the recommended %'s. Do I need to worry about this?

    I have also heard that Dell's PSU's are underrated is that true? Something like a 305w is actually at 350w?
     
  9. dmill89

    dmill89 TS Guru Posts: 475

    surge compensation is the PSUs ability to withstand a power surge under that load. If you have a surge protector you don't need to worry about this. Capacitor ageing is mainly for older PSUs as the capacitors inside of a PSU loose about 10% of there capacity each year.
     
  10. AhrenBa

    AhrenBa TS Rookie Topic Starter Posts: 25

    Ok, that is really good to know. Do you think I would have enough power to spare so that I could also add a PCI fan? thanks
     
  11. dmill89

    dmill89 TS Guru Posts: 475

    yes PCI slot fans only use about 5W or less.
     
  12. AhrenBa

    AhrenBa TS Rookie Topic Starter Posts: 25

    Great! That is very good to know. I appreciate your help very much.

    One last question and that'll be it:

    Since the Dell PSU has Dual rails, it won't have any shortage of amperage for the video card correct? Thanks
     
  13. AhrenBa

    AhrenBa TS Rookie Topic Starter Posts: 25

    Oh and also, I have also heard that Dell's PSU's are underrated is that true? Something like a 305w is actually at 350w?
     
  14. dmill89

    dmill89 TS Guru Posts: 475

    with a combined 12V amperage of 36A it will be fine for that card 24A is enough for most cards and your PSU has that plus an aditional 12A to spare
     
  15. dmill89

    dmill89 TS Guru Posts: 475

    Yes Dell lists the continues not the peek wattage
     
  16. AhrenBa

    AhrenBa TS Rookie Topic Starter Posts: 25

    Wow, this keeps getting better! Thanks a ton!

    Ok, seriously, this is the last question (sorry for asking so many), what is usually the peak on Dell PSU's? By this I mean is there a general number you can add on to your PSU's continuous wattage to get the peak, since dell doesn't tell you?

    Thank you very much! :)
     
  17. dmill89

    dmill89 TS Guru Posts: 475

    there is no definite general number there usually 10-15% deference on PSUs between continues and peek
     
  18. AhrenBa

    AhrenBa TS Rookie Topic Starter Posts: 25

    Sweet. Thank you very much for your help.
     
  19. KingCody

    KingCody TS Evangelist Posts: 992   +8

    for a power supply to be adequate, it's continuous power rating should exceed the PC's maximum power draw.

    the peak output is not important. (the peak rating is usually used to make cheap PSUs seem more powerful than they really are). good PSUs will list continuous power (some list continuous and peak), but cheap PSUs will only list peak.

    in other words, don't worry what the peak output is. it's not important because you should not be drawing more power than the PSU can continuously provide.

    cheers :wave:
     
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