Quote:
Originally Posted by kovidgoyal
64bits is mainly useful if you have some large books that run out of memory during conversions. Otherwise use 32bits happily. And the calibre update notification takes you straight to the correct download page for 32 or 64 buts.
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Scary big book!
Anyway a lot of 64bit Atoms physically can only have 2G RAM (Usually these are shipped with 32bit Win10 but run 64bit linux fine).
32Bit Windows could use PAE to address 16G on NT 4.0, MS even crippled 32bit XP to have applications use 2G max even if 4G fitted, though there is a boot option to increase it to 2.5 G. (1st 64bit Windows was NT 4.0 for Alpha, then 1st 64bit XP was for Itanium, one of the shortest lived versions. x86-64 XP was later)
I have some older 32 bit CPU laptops that are faster than the newer "crippled" to 2G max 64 bit Atoms (an Intel decision, the CPU doesn't even output the higher addresses), I find it annoying that Waterfox and Viber are 64 bit only.
I do hope Koval continues to support Calibre on 32bit on Windows (some quite new 64 bit Atoms with Win10 32bit) and
32 bit on Linux (some older laptops & desktops easily able to have 4G RAM and faster than some new entry level machines).
I use Calibre on several computers, inc a netbook I take out. I don't usually take my main laptop out of the house.