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XFX4890 power issue

Forum Graphic & Displays : Graphics Cards - XFX4890 power issue

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seclar   07-25-2009 at 07:43:12 PM

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?

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infiniteaqua   07-25-2009 at 08:39:26 PM
- 0 +

Anyone? I guess I'll just have to start water cooling then... Any recommendations?

Reply to infiniteaqua
infiniteaqua   07-25-2009 at 08:46:46 PM
- 0 +

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...

Reply to infiniteaqua
alberthynek   07-25-2009 at 11:22:10 PM
- 0 +

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

------------------------------ Albert
 Reply to alberthynek
seclar   07-26-2009 at 12:45:25 AM
- 0 +

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?

Reply to seclar
Crazy V   07-26-2009 at 02:27:23 AM
- 0 +

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.

Reply to Crazy V
Crazy V   07-26-2009 at 02:38:09 AM
- 0 +

Any of those should do. If needed you can try this link.
http://www.frozencpu.com/products/ [...] html?tl=g2

Reply to Crazy V
mikey5802   07-26-2009 at 02:56:22 AM
- -1 +

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?[/quotemsg]

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.c [...] upply-Unit

You need a power supply with a 6 pin and an 8 pin connector. One example: http://www.antec.com/Believe_it/pr [...] d=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.

Reply to mikey5802
seclar   07-26-2009 at 04:38:40 PM
- 0 +

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!

Reply to seclar
Anonymous   10-01-2009 at 07:30:55 PM
- 0 +

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:

Reply to Anonymous
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