The LE is clocked at 250/250 compared to the 275/275 of ATi's own retail board.
No word on what memory Hercules uses on their boards, but judging by past tendencies it may well be the same 3.6ns DDR used on ATis retail boards.
Worst case scenario it'll ave 3.8 or 4ns DDR SDRAM, though I doubt it'd be any worse then 3.8ns RAM as there arent very many R8500 LE's that come with 4ns RAM.