OK, so I ordered Ram from Offtek.co.uk, which supposedly has a good reputation. My Tecra 9100 512mb Ram has arrived and it's in my laptop now. Once again, the Ram has completely slowed down my laptop. Boot time takes over 10mins compared to 5mins with my original Ram and everything is less responsive. FYI I tried Ram from Crucial.co.uk months ago. It was Tecra 9100 512mb PC 2700. Apparently compitable with my laptop, it did nothing but slow down my laptop. I sent it back and bought another, thinking it was just faulty. Again, the 2nd Ram slowed down my laptop so I then ran a Memory Diagnostic test revealing the Ram to be in perfect working order. So the first Ram I bought from them must've been fine but it simply did not give my laptop the boost it should have. My original Ram is Toshiba 256mb PC 2100. It runs fine without a hitch. I just wanted to make my laptop even faster but for some strange reason it just wont happen. Luckily, Offtek wrongly sent me another Ram with the manufacture code that many have recommended for my laptop. I shall try it soon. --------- Well that's basically what I posted in the Toshiba forums and no one has really been of help. I thought I'd post here for the chance someone might have a solution. It's a very strange situation; adding extra Ram which decreases performance. Fingers crossed the other Ram will work... I just did some boot time tests using a stop-watch. I stop it when all my apps have loaded in the taskbar: Toshiba PC2100 256mb Ram (original): 4mins ELPIDA PC2100/PC2700 512mb Ram (new): 13mins (this Ram is guaranteed to work with Tecra 9100's according to Offtek.) Other ELPIDA PC2100/PC2700 512mb Ram (new): 10mins (this Ram, according to some at the Toshiba forums, has the manufacture number which they recommended to me. However, I believe I should have received Toshiba branded Ram, not ELPIDA.) ELPIDA PC2100/PC2700 512mb Ram (new) in Slot 1 + Toshiba PC2100 256mb Ram (original) in Slot 2: 11mins 35secs I don't see the point in testing the other Ram with my original as will be slow still.