different coloured RAM slots

on modern boards they generally tend to relate to dual or tripple channel mode.

always best to have the same memory but as long as you have 2 pairs that are matching it wont make much diff on a normal pc ... but put 1 pair in slot 1&3 and the other pair in slot 2&4

TBH mate it only really matters if you use a gaming rig and then you would need all 4 matching but from experience pc's tend to run faster on 2 larger dimms of memory rather than 4 smaller

just out of curiosity .. how much ram you putting in and what version of windows as XP only supports upto 4 gig and if you have a graphics card that memory is taken into acount too

ok so ive opened up the PC and here are the mobo & Ram details:

have a look in the Motherboard Manual, if you don't have a copy of this you should be able to download it from the ASUS website, together with any window$ hardware drivers you might need.

Obviously what you have is a DDR type SIMM, what isn't clear is the clock frequency. I suspect that your Motherboard supports DDR2 types though.
There is something about the relationship between the '64x8' in terms of it's capacity but can't instantly remember what that is.

The Manual will tell you what type of Ram and the clock rates that are supported by your motherboard.

So long as the SIMMS fit the sockets and the Motherboard supports DDR then you may be OK to use them.
The System Bios should 'auto detect' the RAM clock frequency so you can then find out what 'speed' the RAM you have is.

Do check the Motherboard Manual first though!

If you are still stuck or uncertain about this then look at:
http://www.novatech.co.uk/novatech/prods/components/memory-pcandlaptop/

where you can buy reasonable cost new RAM to match your Motherboard - have found the sales people at Novatech very helpful on the Phone so well worth calling them when you have the MB manual and can tell them what RAM types it says in it.

Hope this assists
Mik

Edited by audiomik - 07 September 2010 at 11:57am