power + hd4780

it's my first post here.

i waited for ages on the new hd4870 but i got a question for the experts here :)
it is important cause i don't want to mess up my pc.

Question is simple: do you think a power supply off 500 watt is enough for this card? or wouldn't you thrust it?

The hd4850 doesn't have such a big power consumption but the temperature of 95°C worries me. Should i?

thanks in advance
11 answers Last reply
More about power hd4780
  1. 500W might do. What is the make and model of your PSU? What else does it power? And how old is it?
  2. I'm hoping and praying that my Corsair HX520W is sufficient. I have the 2 6-pin PCI-e connectors, but it has multiple rails (3 @ 18amps). Not sure how that plays out in the grand scheme of things.
  3. i screwed my pc open and just wrote what is on the power supply

    it's an antec model BP500u
    ac input:100-240V~,8-4A,50-60 Hz
    anything else you need?
  4. ieks said:
    i screwed my pc open and just wrote what is on the power supply

    it's an antec model BP500u
    ac input:100-240V~,8-4A,50-60 Hz
    anything else you need?

    Namely, the power output, in amps, provided on the +12v rails. On your PSU, there should be TWO such rails.

    However, by my guess, each rail probably has 14-16 amps anyway, for a total of around 30 or so; that's 360 watts of +12v power, which is plenty enough to handle your CPU and video card. This guess is reliant on the fact that it's an Antec power supply, which is known as one of the better makers of PSUs.
  5. output under +12V, max 18A and min1.0 A
    that is what you needed right?
  6. Unless you have a larger than usual amount of other stuff you're powering with that PSU it should work OK for a 4870.
  7. thx mates, now i got to have one asap, can't stand the waiting anymore ;)
  8. The Sapphire website lists the requirements for a 4870:
    http://www.sapphiretech.com/us/products/products_overview.php?gpid=245

    –500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode)”
  9. WR2 said:
    The Sapphire website lists the requirements for a 4870:
    http://www.sapphiretech.com/us/products/products_overview.php?gpid=245

    –500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode)”


    Woot I just sneak in there for crossfire (610watt PCP&C silencer) I've been wondering if I was going to be able to do that. Hopefully with a quad core (Q9450) 4gb ram, WD velociraptor, Seagate 500gb SATA and a few case fans I should be alright.
  10. sciggy said:
    Hopefully with a quad core (Q9450) 4gb ram, WD velociraptor, Seagate 500gb SATA and a few case fans I should be alright.
    I don't think you'll have any problems with that high quality PSU. Im sure they make allowances for average PSUs in the 600W range.
Ask a new question

Read More

Graphics Cards Power Graphics Product