Here is AMD Radeon Pro WX3200 PDF: https://www.amd.com/system/files/documents/radeon_wx_3200_datasheet.pdf
The PDF mentions a Foot note "2" which is this:
According to CableMatter that manufacturers cables says this about DP 1.4: https://www.cablematters.com/blog/DisplayPort/what-is-displayport-1-4
What's different about DisplayPort 1.4?
The DisplayPort 1.4 standard was first published in March 2016. While it didn't introduce any new transmission modes, and therefore did not increase the available bandwidth or data rate, it did maintain the strong showing from DisplayPort 1.3. That gives DisplayPort 1.4 a maximum total bandwidth of 32.4Gbps and a maximum total data rate of 25.92 Gbps. That gives it enough bandwidth to handle a 4K UHD stream at up to 120Hz with 24-bit/px color, or a 5K display at up to 60Hz, with 30-bit/px color. It even supports 8K video, but only at up to 30Hz due to the hefty bandwidth demands.
A more important feature of DisplayPort 1.4 is the introduction of Display Stream Compression 1.2 support (DSC). As a visually lossless encoding technique, DSC is a fantastic way to get more for your cabling and with DisplayPort 1.4 and DSC, you can support 4K at up to 120Hz with 30-bit/px color and HDR-enabled, or 8K at up to 60Hz.
Other DisplayPort 1.4 benefits include support for Dual-mode for DVI and HDMI adapters, making it possible to connect a DisplayPort 1.4 device to an HDMI 2.0 source, or vice versa. It also includes better support for HDR10 metadata and forward error correction for a noiseless transmission.
Another major improvement with DisplayPort 1.4 was on the audio front, where it moved from a maximum audio sample rate of 768kHz to 1,536kHz. It also increased the maximum number of audio channels from 8 to 32.
So you can decide but it does indicated since the GPU card has DP 1.4 it supports Dual-Mode.
NOTE: Active Adapter aren't that much more expensive then passive adapters unless you are planning on buying a very High Quality High Definition adapter.
Active adapters tend to be more compatible than passive adapters from what I read.