yes you are right but there is big stablity problem when we want to play GWR21 in a 1920x1080 resolution. even with the excellent 1920x1080 DGUI from Diego (wich eats less ram memory than Ahnenerbe or ARB widegui).
I think at this day, max resolution to play GWR21 in good stability condition is 1360x768 not more...