What are these plugs in the gpus?
HDMI dummy plugs - it makes them think they're plugged into monitors. On Windows at least I haven't found a way to get the 470's to reliably report temp or keep fan speed without them. Nvidia cards work fine.
Do those work for remote access screen resolution issues? I notice that I have screen resolution issues when I remotely access the miner if I don't have a monitor plugged into at least one graphics card, and that is true for both RDP and teamviewer. Windows wants to default to something like 800x600 when it thinks it can't detect a monitor - also have display issues with MSI afterburner in remote access sessions which is what I think you are referring to. I can sometimes use DVI plugs for that purpose but they don't always work (depends on the card I guess).
Also where do you get those? I see some on amazon but they are pricey.