SIIG 20-Pin DisplayPort Male to 19-Pin HDMI Female Adapter, 1080p HDTV, UXGA PC Resolution Support, Up to 2.25Gbps at HDMI 1.3a Data Rate Support : Electronics
Dell u2711 displayport problem "entering power save mode" - Page 19 - Dell Community
TIL that there are monitor manufacturers who use DisplayPort cables where pin20 is also used and which can cause interference and even damage the graphics card/PC - depending on the situation :
25Ft (25 Feet) DisplayPort Male to Male 20-Pin 28AWG Cable with Latche – Ayagroup.com
NeweggBusiness - StarTech.com DP2MDPMF6IN 6" Black 1 x DisplayPort (20 pin) Male to 1 x Mini-DisplayPort (20 pin) Female DisplayPort to Mini DisplayPort Video Cable Adapter - M/F Male to Female
Audio video HDMI computer cable plug and 20-pin male DisplayPort gold plated connector for a flawle photo by twenty20photos on Envato Elements
Black 1080P 20 Pin DP DisplayPort Male To 15 Pin VGA Female Adapter Cable Converter for Macbook, ThinkPad, PC, Laptop, Digital Monitor, Projector, Computers - Newegg.com
StarTech DISPLPORT20L StarTech.com 20 ft DisplayPort Cable with Latches - M/M - DisplayPort Male Digital Audio/Video - DisplayPort Male Digital Audio/Video - 20ft - Black - Walmart.com