2) Photoshop and other 64 bit apps really need to use 64 bit these days -- try a processing a professional quality RAW picture from a Pro DSLR which starts off as a 21 MB File before you even BEGIN to expand it for processing. Now process this with several layers ready for press say at A3 or A2 size and you are almost in the GB range. Process a lot of these pics ..... etc etc.