Latest Premiere Pro Working Much Better with my Old PC

I build my current PC back in 2013 with a 6 core CPU and a GTX 680. It works pretty well with 1080 raw footage but as the new versions of Premiere Pro (2020) came in I was having trouble. It didn't like my graphics card so I stayed with the 2019 version. Previously when I would Export my video to MP4 files my GTX 680 did little or nothing. Now I am using the larest version PP (2021) and not only is there no problem with my old graphics card but when I Export to MP4 my GTX 680 is running hard and up to 100%. The Export time is about half of what it was. Is Premiere Pro finally using the GPU as it should have been all along?