Add USB 3.1 Gen 2 (10Mbps) Z400/600/800

Here's a easy way to add two USB 3.1 Gen 2 (10MBps)  ports  to your Z workstation, this also works on the later Zx20 series workstations

the silverstone ECU04-E card is a PCI-E 2.0 x8 card which has a standard 19 pin USB type A header on it

https://www.amazon.com/SilverStone-Technology-Internal-Connector-ReDriver/dp/B01MQUONVV

when mated with a 3.2 or a 5.25 front USB panel

https://www.amazon.com/Vantec-Front-Panel-Bracket-HDA-502H/dp/B01FWK8PMC/ref=sr_1_4?crid=AC209GP0APEA&keywords=usb+5.25+front+panel&qid=1583547405&s=electronics&sprefix=usb+5.25%2Celectronics%2C199&sr=1-4

you have a complete usb 3.1 setup that is twice as fast as the HP USB 3.0 Gen 1 card (5 GBps)

SDH posted about

https://h30434.www3.hp.com/t5/Business-PCs-Workstations-and-Point-of-Sale-Systems/Add-HP-USB-3-0-card-to-Z-and-xw-workstations/td-p/5609505

the only downside to my solution is that unlike the HP setup, that has 2 front and two back ports the silverstone card only has 2 front 3.1 Gen 2 ports they also make a USB3.1 gen 1 + Gen 2 card (4 ports) but only the back ports are Gen 2, the front ports are Gen 1 

ECU05 model

https://www.amazon.com/SilverStone-Technology-Internal-Connector-ReDriver/dp/B01HZ0XVJO?th=1