Current Class 3 Bios and Drivers are 64 bit only.
You must use an older model because AMD, NVIDIA, INTEL, Microsoft etc have mandated that all new drivers/devices/etc are 64 bit only.
no 32-bit SKU is available for newer processors, video cards etc.
This will impact three areas:
32-bit drivers ended January 2019
AMD / INTEL / QUALCOMM / NVIDIA are all that way.
Nvidia announced this in APRIL 2018.
This includes the following operating systems:
Microsoft Windows 7
Microsoft Windows 8/8.1
Microsoft Windows 10