1TB internal change

just a quick question guys,, right now i have 320g internal ps3 slim and 1tb external,, and im planning to upgrade to 1tb internal

my question is

1) is it OK for it if i put 1tb 2.5" 5400rpm internal to my ps3,,will the ps3 read the 1tb full,, some other says ps3 could only handle 500gig to 750gig
will i get the most the 1tb,,

2) will the ps3 have some issues if the internal is 1TB like overheat or slow loading etc issues,

thanks