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DEC/Compaq sold the ELSA GLoria Synergy-8 as the PBXGK-BB with some sources claiming it was marketed as the PowerStorm 3D10T or 4D10T though its possible these may more correctly refer to another DEC-built card also using the 3Dlabs Permedia 2. The PBXGK-BB has 8MB of RAM with no memory expansion slot or video input. Another variant, PBXGK-BC, was available with video in/out.
Compaq sold these cards for their workstations such as the Professional Workstation XP1000, plus the older Digital Personal Workstation. As such updated drivers were distributed in Compaq SoftPaq form. Despite being a driver for Alpha, the SoftPaq is an x86 self-extracting executable. Compaq advised to use FX!32 to run it on an Alpha, but today you could use something like 7-zip to extract it on a modern PC.
Digital UNIX/Tru64 UNIX 4.0E and up have the required drivers built-in. For Digital UNIX 4.0D, install aggregate patch kit 6 or newer (available here).
There was also a driver for OpenVMS 7.2 which consisted of the files below. The driver package itself was recovered from the internet archive, but it hasn't been tested yet: