each will only draw about 100 ma at 5v. (5v is 42% of 12v so 100ma is 42% of 250 ma.. give or take)
real issue is will the fan start at 5v.. some 12v fans will, some wont. some need 6 or 7 to fire up. once spinning they can run on less but you are limited to 5v period.
no way to tell in advance unless they list it, sorry.
EDIT they do list it here
- those are a no go.
Start-up Voltage 6 VDC
quick look shows most APEVIA 80, 120, and 140 fans need at least 6v to fire. didnt check em all but they all look like the same design within a size, just different colors/LEDs etc.
unless you dont mind starting them spinning by hand till they hit speed