That's correct, and in fact the actual fw has always been the same for 750, 760, 770. It's just that it was previously presented packed in individually named *.exe form for each 700 sub-model up until V4.90 [i.e. nuvi750_490.exe , nuvi760_490.exe , nuvi770_490.exe]. When decompiled, all the exe files yield a folder named nuvi 7xx, in turn containing a Garmin folder with the fw file GUPDATE.GCD. This file is identical for all 7x0 models. V4.90 was offered as both the full exe and as the gcd as i recall. V5.40 is available only as the gcd for all 7x0 units and is simply generically named '7xx'.