XFX4890 power issue

My setup:

XFX ATI Radeon HD 4890 XTX 1024MB GDDR5 PCI-Express
Gigabyte GA-EP43-DS3 motherboard
Corsair XMS2 4GB (2x2GB) DDR2 PC2-8500C5 TwinX Dual Channel (TWIN2X4096-8500C5)
Intel Core 2 Quad Q9550 LGA775 'Yorkfield' 2.83GHz 12MB-cache (1333FSB) Processor
Jeantech JN120F-600-AP12V 600W PSU

I've just put this machine together. First thing I noticed was the 4890 power connectors - there are two; one is 6-pin and the other 8-pin. I've had graphics cards with one or two 6-pin power sockets before but I have never seen an 8-pin.

The PSU has two 6-pin PCI-E power cables plus a 12V 4-pin (for the PSU I assume) and a 12V 8-pin (which I'm guessing is for the graphics card).

Here's my problem....

If I plug in just a single 6-pin cable into the graphics card and leave the 8-pin disconnected, the machine starts and then beeps. The video displays the message "YOU HAVE NOT CONNECTED ONE OF YOUR VIDEO CARD POWER CONNECTORS TO THE POWER SUPPLY. PLEASE REFER TO THE 'GETTING STARTED GUIDE' FOR PROPER HARDWARE INSTALLATION".

If I plug in the 8-pin 12V cable as well the machine does nothing when I press the power button.

I do not know what I am doing wrong. Can anyone help?
12 answers Last reply
More about xfx4890 power issue
  1. Anyone? I guess I'll just have to start water cooling then... Any recommendations?
  2. Sorry wrong topic! The 8 pin is probably for the motherboard. Try plugging in the other six pin pci-e connector into the 8 pin connector and see if that works. There are guides on google about how to do that. I am not sure about your psu though...
  3. yeah the 8 pin is definitely for ur motherboard as its a 12v 8 pin. or for another mobo. only a pcie 8pin works in an 8pin graphics card. however the 4890 will run with 2 6 pins but it will not perform very well. i recommend getting a new psu, maybe 750w and up
  4. I tried putting the 2 PCI-E 6-pin leads into it and it still beeps with the same error message. The PSU is brand new. Do I need to get a new PSU then? If so, can anyone recommend one which is quiet and powerful enough and comes with 6 and 8 pin PCI-E leads?
  5. The XFX 4890 needs the 6 and the 8 pin to work. You can not use just 2x 6pins on these do to the clock speeds they ship them at. A new power supply is your best bet. You can get by with a 650watt if it is a good brand. Try Corsair are PC Power Cooling. Just pay attention to the Amps on the 12 volt rail. your power supply might work with an adapter (6pin to 8pin). You can find them at Frozen CPU and other sites like these. Although i would suggest the PSU upgrade.
  6. quotemsg=1967620,1,457050]My setup:

    XFX ATI Radeon HD 4890 XTX 1024MB GDDR5 PCI-Express
    Gigabyte GA-EP43-DS3 motherboard
    Corsair XMS2 4GB (2x2GB) DDR2 PC2-8500C5 TwinX Dual Channel (TWIN2X4096-8500C5)
    Intel Core 2 Quad Q9550 LGA775 'Yorkfield' 2.83GHz 12MB-cache (1333FSB) Processor
    Jeantech JN120F-600-AP12V 600W PSU

    I've just put this machine together. First thing I noticed was the 4890 power connectors - there are two; one is 6-pin and the other 8-pin. I've had graphics cards with one or two 6-pin power sockets before but I have never seen an 8-pin.

    The PSU has two 6-pin PCI-E power cables plus a 12V 4-pin (for the PSU I assume) and a 12V 8-pin (which I'm guessing is for the graphics card).

    Here's my problem....

    If I plug in just a single 6-pin cable into the graphics card and leave the 8-pin disconnected, the machine starts and then beeps. The video displays the message "YOU HAVE NOT CONNECTED ONE OF YOUR VIDEO CARD POWER CONNECTORS TO THE POWER SUPPLY. PLEASE REFER TO THE 'GETTING STARTED GUIDE' FOR PROPER HARDWARE INSTALLATION".

    If I plug in the 8-pin 12V cable as well the machine does nothing when I press the power button.

    I do not know what I am doing wrong. Can anyone help?

    Two links that I found for the Jeantech JN-120, both specify that it has only 1 PCIE connector:


    http://www.pcworld.co.uk/martprd/product/seo/041388
    http://www.trusted-pc-components.com/product.php/II=806/JeanTech-JN120F500AP--500W-ORCHID-ATX-Power-Supply-Unit

    You need a power supply with a 6 pin and an 8 pin connector. One example: http://www.antec.com/Believe_it/product.php?id=MTc2MA==

    The 2x6+2 connectors can be used a one 6 pin and one 8 pin to power your XFX card. Use the power calculator to make sure you buy a PSU powerful enough for your system.
  7. Thanks for your advice everyone. I took the PSU back for a refund. I have ordered a Corsair HX750W PSU (http://www.corsair.com/products/hx750/default.aspx). On the Resources tab it clearly shows the connectors it comes with and has the 6+2 connectors that I need. I just have to wait 2 more days now, arghh!
  8. i've got the corsair hx650w psu and i get the exact same problem with my 4890 black edition. My psu has the 6+2 cables as well but it still doesn't work.
    Can someone help D:
  9. Please call me on my phone 215-350-0595. I have this exact problem
    I have athe same card except an asus EAH4890. I was going to return the card but I threw away the box. I am sure I made the proper connections. I even tried putting the card in another PCE express slot. I bought the card from egghead.

    You can E-Mail at bobwhite9@aol.com buy it is probably easier to call me to discuss our alternatives.

    Thanks.
  10. bobwhtie9 said:
    Please call me on my phone 215-350-0595. I have this exact problem
    I have athe same card except an asus EAH4890. I was going to return the card but I threw away the box. I am sure I made the proper connections. I even tried putting the card in another PCE express slot. I bought the card from egghead.

    You can E-Mail at bobwhite9@aol.com buy it is probably easier to call me to discuss our alternatives.

    Thanks.


    Did anybody have any luck with the Gigabyte Mobo and HD Radeon 4890:

    I have a similar issue:
    http://www.tomshardware.com/forum/280313-33-radeo-4890-gigabyte-965p-compatibility
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