Hi, Just to check with you all about this. Recently i just bought a second hand Kingston Ram and realise that it is DIMM Ram. but inside my pc are all SIMM. All the Ram are PC 133 Kingston. Same brand and same speed. Is it alright to put it together????

I highly doubt you have a P3 machine with SIMMs...possibly you're confusing single sided & double sided DIMMs? SIMMs have 72-pins...PC133 DIMMs have 168-pins. Will they be recognized by your P3 board? You won't know til you try...many older boards have a problem with high density RAM (generally single sided), if that's what you have, it's possible that the board will only recognize half the capacity (128 will be seen as 64, 256 as 128, etc)

SIMM - Single Inline Memory Module DIMM - Dual Inline Memory Module The difference is whether chips are on both sides of the module or one. If the module is the correct type (i.e corect number of pins), as jam said above, plug it in to see. If something is wrong, you might ear beeps when trying to start it up. It won't harm anything, though. Buzz

Actually, SIMMs can be either sided single sided or double sided...it's the pin count that will distinguish a SIMM from a DIMM