Hi, my name is Arup, I am having some problem with my RAM. I used 256MB DDR1 RAM, and wanted to upgrade to 1GB. I bought new 1GB RAM but its bus speed was more than the previous one. I installed both RAMs and my computer was running well and there was no problem. But after some day I saw that the computer is running slower. But it was supposed to be faster since it has now 1.25GB RAM. Another problem was that, my HDD always asks for defragmentation even though just after defragmenting. Then I removed the previous RAM, and saw that the problem is gone. Now what should I do? Should I use only one RAM? Please help me. Thank you.