Enough power to my vga card or not ???

Hello guys !!!
I borrowed my friend vga card Sapphire 5750 and try it to my pc.
But when I turned on the pc, my screen was blank.
I had attached the 6-pin power the Sapphire 5750.
My power supply is 650 watt.
My motherboard is ASRock 945G-DVI (only 20-pin ATX power + 4-pin ATX connector + PCIE X16) and
BIOS was updated to 1.9 (latest BIOS).

The question are:
>Sapphire 5750 get enough power or not ?
Because I can run 8800GT on the same pc before.
>That's Intel chipset 945G support Sapphire 5750 or not?

Thx.
13 answers Last reply
More about enough power card
  1. What is your PSU brand?
    How many amps are on your PSU 12V rails?
    What are the ATI drivers that you installed before you changed the card?
  2. An HD5750 uses less power than an 8800GT so I doubt the problem is the PSU.
  3. Did you uninstall the old graphics card before swapping out the cards? No removing the drivers before switching brands (ATI, Nvidia) can cause the new card not to be recognized by the OS, usually causing the blank screen phenomena.
  4. Power will not be a problem cuz 5750 is such gr8 card that it'll run on even a crappiest 650w psu.
  5. Neither card creates a power issue

    8800GT = 58 watts (256 MB)
    5750 = 36 watts

    Source = http://www.antec.outervision.com/PSUEngine

    Switching GFX cards however requires that you change drivers....this is "safe way":

    1. Download latest ATI driver to HD; Uninstall Nvidia drivers, reboot
    2. Clean out any stray registry items w/ a driver cleaner or registry tool like CCleaner, reboot
    3. Remove nVidia card
    4. Install ATI card w/ internet cable unplugged.
    5. Install downloaded ATI driver from HD.
  6. Thanks, Guys!!!

    But, my screen blanks from beginning. No text description like processor, memory, harddisk, etc.

    I changed the BIOS to detect my PCIE.
    Then, took off all the harddisk, optical drive, and also used 1GB memory single channel.
    But, screen still blank from the beginning.

    I switched the vga with 8800GT and it worked fine.
    Then switched back with 5750, screen blank at all.
  7. JackNaylorPE said:
    5750 = 36 watts

    The card is quite low power but nowhere near that. Double it and it's probably about right.
  8. yadi12 said:
    Thanks, Guys!!!

    But, my screen blanks from beginning. No text description like processor, memory, harddisk, etc.

    I changed the BIOS to detect my PCIE.
    Then, took off all the harddisk, optical drive, and also used 1GB memory single channel.
    But, screen still blank from the beginning.

    I switched the vga with 8800GT and it worked fine.
    Then switched back with 5750, screen blank at all.

    This sounds like the card doesn't work... that's the only thing I can think of.
  9. How about the motherboard (Conroe 945G DVI) it's only 20-pin power + 4-pin power ???
    Should I change it to 24-pin power + 4-pin power ???
  10. Your motherboard should be compatible as long as it has a PCIe x16 slot and it does. As for the power you should plug in whatever power cables the board has a spot for.
  11. I agree with jyjjy; the card probably doesn't work. If you have another system you could test it on, you should try that, but considering what you've tried so far, its unlikely that that would work either.
  12. The problem was the motherboard.
    I bought a new motherboard with 785G chipset. Then, installed the Sapphire 5750 and it worked.
    My vga card is ok. My screen didnlt blank anymore.

    So, thank you for your advice, Guys!!! :D :D :D
    The problem is done.
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