Is there a difference between DDR333 SDRAM and just DDR SDRAM???
Ram Difference?
No. The 333 is just the speed. DDR modules come in various speeds namely: 200, 266, 333 and 400 MHz. Saying just DDR SDRAM doesnt tell you much. The specification of the speed of the module is a must.
OK, l've found that for the ram to work, it must be SODIMM(this is what all notebooks take) and for this specific notebook, l can have any DDR SDRAM, so l've found what l need, just thought l'd post that for anyone looking around for a quick answer to this same problem. 
Related topics
