GPU-Z/WattTool do not show values without Monitor

[FlensGold]

Hello,
since I am running out of ideas I am asking here. I have a few rigs, most of them with ASRock H81 Pro BTC Mainboard with GPUs attached via Riser Cables (normal setup, I guess).
My problem is, that although the latest drivers are installed I do not get any sensor information on clock/memory/temperature with GPU-Z. WattTool also does not detect any values.
I do only have this problem as long as no monitor is attached to the system. If I do attach a monitor it does work.

I also should mention that I am only able to start the Windows Rigs without monitor by setting the primary display to onboard in Mainboard BIOS.

Since the ASRock H81 seems to be a popular Mainboard for GPU Miners I am hoping that other miners do have a solution for this problem.
Thank you and kind regards

[1714180939]

1714180939

[Xdragon]

You have to have one HDMI to VGA adapter, or hdmi dummy per rig, usually on a card in main(16x slot). This is the case only for AMD Polaris series of cards.

edit: like this https://www.aliexpress.com/item/2016-Top-Sale-HDMI-to-VGA-Converter-Adapter-HDMI-Cable-for-Xbox-360-PS3-DVD-STB/32612435120.html?ws_ab_test=searchweb0_0,searchweb201602_2_10056_10065_10068_10055_10054_10059_10078_10079_10084_10083_10073_10080_10070_10082_10081_10060_423_10061_10052_10062_10050_10051,searchweb201603_1&btsid=998f270f-237e-4968-805d-fd5b102a1e8e


and DO NOT use version without cable, like this, people are reporting that it does not work https://www.aliexpress.com/item/2016-New-HDMI-to-VGA-Adapter-with-Audio-Cable-Power-Male-To-Female-1080p-HDMI-to/32609932969.html?ws_ab_test=searchweb0_0,searchweb201602_2_10056_10065_10068_10055_10054_10059_10078_10079_10084_10083_10073_10080_10070_10082_10081_10060_423_10061_10052_10062_10050_10051,searchweb201603_1&btsid=998f270f-237e-4968-805d-fd5b102a1e8e

[mirny]

What do you think, can I use HDMI switch too?
Something like this.
https://www.aliexpress.com/item/5-port-HDMI-switch-5x1-switcher-converter-adapter-Support-audio-HDMI-1-4-3D-video-720p/1863834139.html?ws_ab_test=searchweb0_0,searchweb201602_2_10056_10065_10068_10055_10054_10059_10078_10079_10084_10083_10073_10080_10070_10082_10081_10060_423_10061_10052_10062_10050_10051,searchweb201603_1&btsid=f8a91608-df5d-4b71-be97-d9f5681d010a

Because I'd like to connect all outputs to one monitor, with sensors supported.

[hashing4jesus]

get a pack of .75 ohm resistors look it up super cheap super easy. for some reason on my windows rig all i have to do is attach 1 resistor and extend the desktop to 1 amd card since i do all my other bullshit on my 750ti (which isnt shit for mining but sips on power and does what i need it to). http://blog.zorinaq.com/the-5-second-vga-dummy-plug/ from the same gangsta who brought you silentarmy mining and trompsolver to make claymore a million fafillion..... ahem, with a great writeup on this exact.... same..... thing..... hit me up on poloniex peace

[hashing4jesus]

i couldnt pm it to you: https://rumorscity.com/2013/12/06/how-to-create-dummy-plugs-for-your-graphics-cards/

[FlensGold]

Thank you all for your ideas which did help me. I bought the adapter Xdragon posted and it is working fine