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Author Topic: Dummy plugs do not fit into R9 290  (Read 7000 times)
B.T.Coin (OP)
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November 15, 2013, 09:26:27 PM
 #1

I just received a R9 290 card that I want to use in a scrypt mining setup.
When I tried to hook it up, I noticed that the DVI connectors on the R9 290 do not have the 4 holes for the analog VGA signal so my dummy plugs do not fit.
Now I'm testing it with the monitor hooked up to it but eventually I want to install 2 of those cards and run the monitor off the integrated onboard GPU (if I use a monitor at all).
If I do not install the dummy plugs or a monitor, I can mine on the R9 290 but it will not let me read the temps, fan settings etc.

Any suggstions how to get this working?

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BitcoinAddicts
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November 16, 2013, 01:26:11 AM
 #2

I just received a R9 290 card that I want to use in a scrypt mining setup.
When I tried to hook it up, I noticed that the DVI connectors on the R9 290 do not have the 4 holes for the analog VGA signal so my dummy plugs do not fit.
Now I'm testing it with the monitor hooked up to it but eventually I want to install 2 of those cards and run the monitor off the integrated onboard GPU (if I use a monitor at all).
If I do not install the dummy plugs or a monitor, I can mine on the R9 290 but it will not let me read the temps, fan settings etc.

Any suggstions how to get this working?

You can always buy a motherboard that can support mutiple GPU without dummy plug...

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MilesJohan
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November 16, 2013, 04:45:17 AM
 #3

I just received a R9 290 card that I want to use in a scrypt mining setup.
When I tried to hook it up, I noticed that the DVI connectors on the R9 290 do not have the 4 holes for the analog VGA signal so my dummy plugs do not fit.
Now I'm testing it with the monitor hooked up to it but eventually I want to install 2 of those cards and run the monitor off the integrated onboard GPU (if I use a monitor at all).
If I do not install the dummy plugs or a monitor, I can mine on the R9 290 but it will not let me read the temps, fan settings etc.

Any suggstions how to get this working?

Check your motherboard, most motherboard have slot which you do not need dummy plug and some needed... So you should be able to run 2 with only 1 monitor....

MileyJohanson
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November 16, 2013, 07:24:48 AM
 #4

Check your motherboard, most motherboard have slot which you do not need dummy plug and some needed... So you should be able to run 2 with only 1 monitor....

Actually I do not want to hook up any monitor at all and control it using teamviewer.
My current motherboard is ASrock B75M-GL R2.0
How can I know if a motherboard will run the GPU without dummy plugs? Can anyone suggest a board (socket 1155) ?

Does anybody have any experience with using a HDMI dummy plug? I read some electronics forums where they talk about connecting HDMI pin 19 (hotplug) to pin 18 (+5V) but the stories are not consistent so I'm worried about frying my GPU if  try Sad

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Undefeatable
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November 16, 2013, 01:27:18 PM
 #5

Check your motherboard, most motherboard have slot which you do not need dummy plug and some needed... So you should be able to run 2 with only 1 monitor....

Actually I do not want to hook up any monitor at all and control it using teamviewer.
My current motherboard is ASrock B75M-GL R2.0
How can I know if a motherboard will run the GPU without dummy plugs? Can anyone suggest a board (socket 1155) ?

Does anybody have any experience with using a HDMI dummy plug? I read some electronics forums where they talk about connecting HDMI pin 19 (hotplug) to pin 18 (+5V) but the stories are not consistent so I'm worried about frying my GPU if  try Sad

I am using GA-990FXA-UD3 which don't need any dummy plug to run 4 GPU.. I have no idea about socket 1155 hm...

MarketTime
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November 16, 2013, 05:16:41 PM
 #6

Check your motherboard, most motherboard have slot which you do not need dummy plug and some needed... So you should be able to run 2 with only 1 monitor....

Actually I do not want to hook up any monitor at all and control it using teamviewer.
My current motherboard is ASrock B75M-GL R2.0
How can I know if a motherboard will run the GPU without dummy plugs? Can anyone suggest a board (socket 1155) ?

Does anybody have any experience with using a HDMI dummy plug? I read some electronics forums where they talk about connecting HDMI pin 19 (hotplug) to pin 18 (+5V) but the stories are not consistent so I'm worried about frying my GPU if  try Sad

Im not sure about asrock but I suggest you getting the new dummy instead of a new motherboard, you know its a waste...
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November 16, 2013, 05:20:34 PM
 #7

I've built like a hundred mining rigs and never used dummy plugs one time. Controlled them all with teamviewer, too. Not sure why dummy plugs are ever needed. but I've never had to use them

On one machine, I had to have a monitor plugged in to any GPU for the screen to load on teamviewer, but as soon as it loaded, I just unplugged the monitor and it worked fine through Teamviewer

B.T.Coin (OP)
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November 17, 2013, 07:36:04 AM
 #8

On one machine, I had to have a monitor plugged in to any GPU for the screen to load on teamviewer, but as soon as it loaded, I just unplugged the monitor and it worked fine through Teamviewer

This is on all my current 7950 machines so I can get them to work by plugging in the monitor once, but when the machine reboots or the power goes down I'm f*#kd. This is why I use dummy plugs on all of them.
I have one haswell board running so I will try this first with the R9 290 before risking the HDMI trick.

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whitemage
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November 17, 2013, 10:50:35 AM
 #9

I've built like a hundred mining rigs and never used dummy plugs one time. Controlled them all with teamviewer, too. Not sure why dummy plugs are ever needed. but I've never had to use them

On one machine, I had to have a monitor plugged in to any GPU for the screen to load on teamviewer, but as soon as it loaded, I just unplugged the monitor and it worked fine through Teamviewer

It is needed for some motherboard, what motherboard are you using???

B.T.Coin (OP)
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November 18, 2013, 07:36:17 AM
 #10

It is needed for some motherboard, what motherboard are you using???

ASrock B75M-GL R2.0 (socket 1155 ivy-bridge)

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December 06, 2013, 10:16:59 PM
 #11

Same problem here.  If you look at the output to the 7950, there are 2 slots where the 2 prongs on the dummy plus fits in.  Those 2 holes are filled on the r9 290 outputs and thats why the dummy plugs wont fit in.  All I get is dead card without the plugs.  I learned that with the 4 7950 rigs I built and the same is happening here.

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January 26, 2014, 07:57:17 AM
 #12

I just received a R9 290 card that I want to use in a scrypt mining setup.
When I tried to hook it up, I noticed that the DVI connectors on the R9 290 do not have the 4 holes for the analog VGA signal so my dummy plugs do not fit.
Now I'm testing it with the monitor hooked up to it but eventually I want to install 2 of those cards and run the monitor off the integrated onboard GPU (if I use a monitor at all).
If I do not install the dummy plugs or a monitor, I can mine on the R9 290 but it will not let me read the temps, fan settings etc.

Any suggstions how to get this working?
you remove cataltist driver then reboot then install then reboot it'll see r290 i use 270 ve 290 together
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January 29, 2014, 09:53:37 PM
Last edit: January 29, 2014, 11:05:30 PM by ChasingTheDream
 #13

I'm trying to get the dummy plugs to work with R9 290X TRI-X's.  Things work fine when I plug a monitor into the card but they don't work at all when I use the dummy plugs.  I'm sure the resistors are in the right holes on the VGA side of the adapter but I'm just confused as to why it isn't working.  The same resistor set up worked fine with the 7850's.

I've tried both DVI-D ports on the R9 290X TRI-X's but I get nothing.  When I plug an actual monitor in to either port it works fine.  I'm using 68 ohm resistors.  The only thing I can think of is that these cards need a different resistor but it would be anyone's guess as to which size would work.

Any ideas?

Edit:  Well after more research I'm seeing that dummy plugs won't work on 290's and 290X's.  Most are saying they aren't necessary but that is not my experience.  Without a monitor on the systems the system I can not boot into Windows 7 64 bit.
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February 03, 2014, 11:24:54 PM
 #14

I have a 7950 and r290 in my rig but I don't have the right adaptor for the r290. The screen goes black when I have them both in as I presume it makes the r290 the one it likes best.
Can I modify the adaptor for the 7950 to go in the r290? I see that there are 2 pins that prevent it from being linked to it. Surely it's not that simple though? Maybe I will just remove the pins and find out!
Also can the r290 or any other gpu be dummy plugged without the adaptor?
I wander if anyone else is having these issues?
 Grin
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February 03, 2014, 11:27:53 PM
 #15

You dont need plugs any more. Multiple MBs all with dif configs, and they mine just fine without the plugs.

Ninja edit:
I dont even have a monitor plunged into any of them and they reboot just fine.
I just run VNC to load from remote area if I need to change coins and whatnot.

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February 03, 2014, 11:30:05 PM
 #16

You dont need plugs any more. Multiple MBs all with dif configs, and they mine just fine without the plugs.
Agreed. Dummy plugs are unnecessary.
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February 03, 2014, 11:31:22 PM
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You dont need plugs any more. Multiple MBs all with dif configs, and they mine just fine without the plugs.
Agreed. Dummy plugs are unnecessary.

Yep and it is also my understanding that it draws a bit of power too thinking there is a monitor to account for.

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February 03, 2014, 11:41:21 PM
 #18

A few of my 6 290 rigs will not post without a monitor, I'm not sure why. I bought a few displayport to vga adapters online for ~$5 each, and made dummy plugs from those. Each rig only needs one dummy plug, and it really only needs it to clear post, I got by with just one for a while, waiting for china mail. I got lucky and had a display port to dvi-d adapter from a v5900 I bought, worked fine as a test  Grin

I just made a bunch and I leave one in each rig so I can remotely reboot them reliably.

You will not be able to dummy plug a 290/290x with a non-active dvi to VGA adapter. There are no analog outputs on a 290, so the non-active adapter does not work. You need an active adapter, usually has a big box built into it.

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February 05, 2014, 06:49:24 PM
 #19

A few of my 6 290 rigs will not post without a monitor, I'm not sure why. I bought a few displayport to vga adapters online for ~$5 each, and made dummy plugs from those. Each rig only needs one dummy plug, and it really only needs it to clear post, I got by with just one for a while, waiting for china mail. I got lucky and had a display port to dvi-d adapter from a v5900 I bought, worked fine as a test  Grin

I just made a bunch and I leave one in each rig so I can remotely reboot them reliably.

You will not be able to dummy plug a 290/290x with a non-active dvi to VGA adapter. There are no analog outputs on a 290, so the non-active adapter does not work. You need an active adapter, usually has a big box built into it.

Thanks for the info on the active adaptor needed.

My mining rig currently has 1 x 6970 & 1 x 7970.   Unless I dummy plug the 6970 (no monitor attached), its disabled in Catalyst and of limited usefulness.

I'm adding 2 x 290x into the Win7 64 pc.   Like other surprised posters in this thread, I discovered that an analog (passive) dvi->vga adaptor with resisters (my diy dummy plug) does not fit the 290x (due to no analog output).

I'm just about to purchase 2 x active adaptors in the hope of my resistors working when stuck into the vga port.  Hopefully Catalyst will enable these gpus for full use within Catalyst.

I would imagine the posters in this thread who are happily mining without dummy plugs on their 290's are satisfied without having the 290's "enabled" in Catalyst.  My experience so far is that the 290x I tested behaved just like my 6970.   They are visible in Windows, but not enabled in Catalyst (listed as "disabled").

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February 05, 2014, 07:55:25 PM
 #20

I use Linux almost exclusively for my miners any more, and before that I never used catalyst for anything.

You use windows? You've got hundreds of options much better than catalyst, which you don't even really need in the first place.

Anyway, if for some reason that's what you want to do then yeah, active adapters will work. You are likely just wasting money on unnecessary dummy plugs, though.

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