I have tried to increase the amount of RAM that I have in my computer. I originally had 128 (Can't remember speed) but I have replaced it with 2 x 256/133 bit RAM, however when I try to add some more (128/100) to the third slot my computer won't boot up, however if I put a 256, and 2 x 128 in the three slots it works OK. So is there a maximum?

What model motherboard do you have? There are several ways to find the answer to your question. For you, the simplest will be to visit www.crucial.com and let them scan your system. They will most likely identify your motherboard and advise ram specification. Another way would be to read your motherboard manual. If you don't know what make/model your motherboard is there are programs available for download that can help you identify your system. This is one such: http://www.snapfiles.com/get/siw.html Goin' Fishin' (Some day)

Thanks for the reply. The trouble is at the moment I have lost my internet connection on my computer at home (this is my Works Computer at the moment) so I can't get to Crucial or the site you have suggested for the computer I have the problem with (Is this as a result of playing around with the RAM) I intend to try and get back to my original configuration or reload my internet software tonight, then I will look at this site. Is it possible that a Pentium II would only support 512MHz? Thanks

It's very possible and more than likely, but without the Mobo specs, it's hard to tell. Follow through with your plan.

The motherboard/chipset dictates how much RAM can be used, not the CPU. You need to find the make/model of the board, then enter that info into a site such as crucial.com. You most likely need low density PC100 & it's very possible that your board only supports 128MB per slot. http://support.gateway.com/s/tutori...

Thankyou for your comments. It seems that I have got to try and find out my Motherboard specs - Can any one tell me if the id is likely to be stamped on the board anywhere? Trouble with most second-hand computer stuff is that it rarely tells you it's id, unless like you say, you go to 'Crucial' or similar - and without internet access for the computer in question, that is difficult. Hopefully I'll reload the internet software and rediscover it. Thanks