Bitcoin Forum

https://rumorscity.com/2013/12/06/how-to-create-dummy-plugs-for-your-graphics-cards/

Says you should.

I notice that my asrock BTC won't boot if not connected to monitor. I need only 1 monitor for the whole mining rig though.

So I just want to make sure.

Yes. Their about $10 on amazon, if you live in the US. But if you want to DIY, that seems like an okay solution.

You have two options .

High price around 10$ can get you HDMI dummy plug that will emulate 2K or 4K screen for easy management when you use remote desktop.

Cheap price around 1.5$ can get you HDMI to VGA converter that will get the system to boot  but only at 640X480 if you using remote desktop to install the drivers ,you can connect a monitor once after you install drivers once and raise the resolution and leave it at it is .

i didn't use dummy plug since 2013..

i want to know what is the difference between my rigs and the rigs that require one.

If you are running RX480/RX470(new generation only). They don't boot with most boards

i don't use dummy plug with my RX 480/470, i only use dummy plug when i need control my rig by teamview.

If system crashes it will boot, first start it wont.

this is probably a fix for the 4mhs PITA bug

pro btc board can boot without dummy but you have to set the internal video card on as primary on the bios.  it sucks though bad.  I use dummys

I use dummy plugs mainly to get a usable screen resolution when using remote management software such as VNC. Since my main workstation is a 4k screen, the default 640x480 or whatever is way to small and even some windows such as the Wattool do not display fully.

I use RX470/480's almost exclusively and all my rigs will boot without the dummy plugs, indeed I have only about half the number of plugs as I do rigs so I often have to swap them around.

It will boot but will run at 4MH/s for the main 16x pcie slot GPU.

i have a 3x rx480 rig...not using dummy plugs here


so..it must be the boards.....using old socket 775 boards here

Hi
I don't use dummy plugs, not on the H81 Pro btc boards, AM1 boards, F2A88X boards, Z170 Boards.

both with RX480 and GTX 1060 / 1070 and 1080  (everything on linux, of course  ;) )

there is a trick to read the EDID from your monitor, save it to a file, and then feed it manually to the X window, so it will not check if the monitor is present or not, which is great when you wanna control fan speeds, overclocking or enter remotely via VNC, because the OS thinks the monitor IS connected  ;D

if there is interest i can find my notes how to doit, and post it.

BTW: I did that mod with the VGA-DVI adapter back in 2013 when it was necessary to do it, but nowadays makes no sense because there are no more analog GPUs, all modern GPUs has DP / HDMI / DVI-D only, no DVI-A anymore.

yas! make it dummy friendly too if you can!

if this is just to correct its course 4mhs PITA
then his problem where if it's just simply fix it.

Yup, using these for $3 each. https://www.aliexpress.com/item/New-Arrival-for-HDMI-to-VGA-Adapter-Converter-For-Audio-HDMI-PC-Laptop-HD-Line-DVD/32764863124.html

Although my rigs work without dummy plugs, the resolution is 640x480. Using these dummy plugs, 1920x1080 is available, much easier to work with if troubleshooting is required.

Never had that 4mh problem running dummy-less.

I just have to work with the 640x480 screen size, isn't much of problem after it is setup and you learn how to work with it.

Different mobos may react differently to running without the plug, so it is not a bad idea to have some just in case.

nope a  KVM switch i need that more ........ a KVM will do that same thing but better imo ...

yeah but when you have more than 3-4 KVM's become a bit expensive

Wait, wait, wait.. So, you want to say that this thing can do the same thing as HDMI dummy plugs? Because, there is a significant difference in price... ;D

I dont. I have built in GPU with CPU and acts as a primary. Running 2 7990 cards + r9 280. resolution via teamviewer is 1600x900.

Didnt need it a few years back either when running a 7850 + 5850 :)

I'm running 6 x 4 card rigs, mostly rx470 with 1 rig on rx580. About half the rigs boot fine with no monitor or dummy plug.  The rest need something plugged in to boot. This is odd because the rigs are identical boards ram and cpu. I have one rx580 card that boots and runs fine for around 10 hours then drops to around 4mh. It has nothing plugged in when this happens.  Trying to see how long it lasts with a monitor at present.  Also swapped from claymore to ethminer just in case claymore is the problem. May have to get some dummies on order.

A much cheaper method is to simple place a 75 ohm resistor between C1-C5 (analog red - analog ground), or C2-C5 (green - ground), or C3-C5 (blue - ground) directly to the card.

The resistor leads fit perfectly.

I have done this for years.

Works like a charm.

Takes about 5 seconds.

~BCX~


http://i66.tinypic.com/2z9kw7r.png

Direct link to diagram if pic above isn't working

http://i66.tinypic.com/2z9kw7r.png

With nvidia cards and intel you don't need plug hdmi cause you can use internal gpu and you can use msi afterburner perfectly

With amd processor is not possible cause of they have not internal gpu

With intel cpu and amd cards you can use internal gpu but you can't use msi afterburner it won't read your amd cards properly so... best solution for not spending money is intel + nvidia cards!😉

I bought some fake hdmi on Amazon 20 euro so it's cheaper anyway.

I currently have a rig with Asrock BTC Pro 2.0 and 6x Dell RX 480 (reference?) cards. Do I only need one dummy HDMI plug for the card that's plugged (via riser) into the x16 slot, or need to buy six dummy plugs?

you need only one

About to build my 2nd rig tomorrow.

Currently, I have a monitor connected to my 1st rig. Can I just pull out the DVI plug out of the GPU, while miner is still running? Won't that freeze/crash or introduce anything unexpected to my rig?

While i'm at it, i'm using 6x Rx 580s. In your experience, will I be needing a dummy plug for my cards for them to run and hash properly?

Thanks for whoever that answers!

Because if not, i'd be buying an hdmi plug from amazon but it won't be here till Monday.

With my ASRock BTC, I have never use a dummy plug.
But I use nVidia cards.
It seems dummy plug was used only for previous generations of AMD GPUs.
With ASRock BTC and nVidia, you plug you screen directly to the motherboard.

I know this topic is old but I have situations where one Nvidia card hashing only 50%  if there is nothing connected to HDMI.
Win10, latest Nvidia drivers, MBO is Asus mining expert with iGPU enabled and set as primary.

I have plugged in monitor directly on HDMI port on MBO and hashing is at 100% as it should be.

If you're running Windows and using the mobo graphics (IGD), running a dummy plug (or having a monitor connected to the mobo DVI/HDMI port), ensures that Windows itself will use the internal graphics for the desktop, and not steal resources from one of the GPU's used for mining.

If you RDP to a rig @ 4k, you can easily observe the hash rate dropping on one of your GPU's if the desktop is not being rendered by the IGD.  Not a big deal if you have your rig set to auto log in and start mining and keep an eye on things pool side, and/or use something like Awesome Miner to monitor.  But if you like to keep a RDP session going and monitor the rig that way, it makes sense to force the desktop to use the IGP.  RDP'ing at a lower resolution like 1280x1024 doesn't have as much impact as doing it at 4k.

Ok, but how to force windows to use iGPU?
On hardware level I can just plug monitor or Dummy plug, how to set it on software level so I don't have to use any dummy plug?

When I was running win 10 and want to remote desktop in I was using dummy plugs cause the screen size sucked but I stopped using them because one of my gpu's that had the dummy plug burnt out so I got nervous and removed them from my rigs now I'm running hiveos and it's stable been running for months with no issues rigs crashing or win somehow sneaking in a upgrade after I had it disabled, I wish Microsoft would give us back control of our pc's without going through a bunch of crap to disable updates

I'm not aware of a way to force is short of using a monitor, dummy plug or kvm.  I sure wish there was a way.  I'm running Nvidia cards btw, not AMD.  So there is no resolution restriction, just the hit on the GPU windows decides to use for the RDP session.

You would think that by setting the BIOS to only use IGD (as opposed to Auto or PEG), the OS would be forced to use the on-board graphics, but that is not how it works, unfortunately.

Are u sure that your card burned because of dummy plug in the first place?

My rig was running fine for months without hdmi dummy plug and after Windows 10 updated to version 1709, it stopped.
First gpu started to hash 0 mh/s so I had to buy cheap hdmi dummy plug.
After I pluged it in, it works fine now.
I was wondering, how come gpu could work without hdmi dummy plug before, and after windows updated it can only run with hdmi dummy plug?
I used same drivers before and after windows update.
Gpus are rx 470 4gb.

It is necessary to use with AMD cards. Usually miners are working better and no problems with temperature and fan control of GPU.

i am wondering if you have ever got an answer for your question?
because i also face the same issue
few rigs run perfectly well for one year, and after some windows updates they require this plug
why is that? and how can i make it to work just like it did for a whole year without having to buy 15 dummies for 15 rigs?
uninstalling the update will not help, because windows will reinstall it FORCEFULLY without asking for your permission, even when you have Windows Pro (you can disable it ONLY for 30 days)

You can deactivate the Windows10 update completly, you only must find the right option in windows for this  ;) My rigs make no update for around 1,5 years.
But i think, buy a hdmi dummy, it is better in every case and sorry you have 15 rigs and a hdmi dummy is to expensive? 2$ for 1 so 30$ is to much? EPIC FAIL

I have a handful of dummy plugs (UK) if anybody needs. I always found it depended on the MB and how the bios was set, also if you use Win10 or Linux, but they do come in handy.