Power Supply and ati 5770

Hey folkes!

I'm looking to buy a new computer but I cannot seem to make up my mind about which power supply to get. I'm only concerned about the PSU, due to the high amp requirement of the graphics card.


The grahpics card I've been thinking of is, Club 3D - 5770 with 512MB:
http://www.club-3d.com/products/products_ending_page_7_with_id.cfm?product_id=229


The requirement is 40 amp on a single 6-pin 12V.


These are the options I've been thinking of:


Cooler Master Silent Pro M600: the only one that has 40amp on a single 12V, that I've come across
http://www.coolermaster-europe.com/product.php?product_id=4199

Zalman ZM600-HP: this one's got 16 amp on a single 12V
http://www.zalman.co.kr/ENG/product/Product_Read.asp?idx=196

OCZ 600W ModXStream Pro: and this one's got 25 amp on a single 12V
http://www.ocztechnology.com/products/power_management/ocz_500w_700w_modxstream_pro_power_supply


I would prefer getting the Zalman, because it's in stock, but will it work and could it run 2 x 5770's in the future?


The parts I'm getting are:

Motherboard: ASUS M4N68T
Processor: AMD PHENOM II X2 550 3.1GHZ AM3 BOX
RAM: 2GB 1066MHZ DDR3 NON-ECC CL7 DIMM X2
HDD: SMG F1 750GB 3.5" SATA2 7200RPM 32MB
GPU: CLUB 3D HD 5770 PCIE 512M GDDR5 DVI/HDMI


I've been going nuts trying to figure this out :pfff:


Thanks! :)
- exu
7 answers Last reply
More about power supply 5770
  1. exu said:

    The requirement is 40 amp on a single 6-pin 12V.

    Not a requirement , a reccomendation, and not for a single 6 pin, for the entire system.

    Any of the 3 psu's that you have chosen would do for the spec's you've listed and Crossfire of the 5770.
  2. the graphics card is no where near 40 amps. 40amps on 12v is 480watts and the 5770 is only rated for a max of around 170watts.

    Any namebrand 400watt+ will work just fine for any setup you get, but typically paying the extra for a 600watt is marginally more.

    To put it in perspective, an i7 OC'd to 3.9ghz, with a 5770 and 6GB of DDR3 2100mhz memory will pull ~280watts *at the wall* or about 250watts at the PSU.

    So, a 400watt brandname PSU will work just fine for any non-super OC'd comp.

    Personally, I forked out the $130 for an Antec New 750 true power. The fan doesn't even kick in when under load because it's idle.
  3. Hi newcomer and welcome to the Tom's hardware forum.

    Here are the system requirements for the 5770.

    ATI Radeon™ HD 5770 System Requirements

    PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard
    450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)
    Certified power supplies are recommended. Refer to http://support.amd.com/us/certified/power-supplies/Pages/listing.aspx for a list of Certified products
    Minimum 1GB of system memory
    Installation software requires CD-ROM drive
    DVD playback requires DVD drive
    Blu-ray™ playback requires Blu-ray drive
    For an ATI CrossFireX™ system, a second ATI Radeon™ HD 5770 graphics card, an ATI CrossFireX Ready motherboard and one ATI CrossFireX Bridge Interconnect cable per graphics card (included) are required


    The recommended PSU is for the entire system.

    Now, all those PSU aren't very good here are some options that can run ur rig without problems.

    1- Antec 500W
    2- SeaSonic 500W
    3- Corsair 550W more that u need but very good PSU for a good price
    4- Antec 550W another solid PSU but more expensive.
  4. 40a on the 12v to run the ATI 5770?? they must be laughing their butts off when they post that stuff

    you can run a 5770 system on almost half that amount.

    if you are in the USA, newegg is selling the corsair 400w for $20 after rebate
    http://www.tomshardware.com/forum/286056-28-corsair-400w-newegg
  5. thank you all, for your answers.

    much appreciated !
  6. ^40A? Only with 1A is enough for kill it what do u think that can do 40 amperes?
  7. I'm running a near identical system on a Corsair CX400 - my mobo can't Crossfire so it's not an issue for me. If you're looking at Crossfire have a look at a good 550W as suggested above.
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