System became slow after upgrading the RAM

[gkarthik78]

Hi,
My Thinkpad T60 (2623D6U) became slow after i installed 1 GB RAM. Now my system has 1.5 GB in total. .5 GB in one slot and 1 GB in another one.

Is the unmatched RAM causing issues ?



regards,
Karthik

[tylerwylie]

If you installed slower RAM that could be the issue, as both modules are running at the slower speed instead of one at the right speed.

[XIII]

The difference in RAM speed is not human-observable.
If you are running Vista, the cause is it. Vista likes to fetch a lot of programs to RAM. During the process, the system is very unresponsive but after that, you should see a small boost.
And, this only happens when you have more than 512MB of RAM.

[gkarthik78]

both RAM are of same speed 667 Mhz and i am having only windows xp. Not sure which causing this issue


regards,
Karthik

[meekus]

A stick of DDR2 PC2-4200 533 MHz RAM wasn't installed by chance?

The T60 (and specifically the 2623D6U which sports a CD T2400) requires DDR2 PC2-5300 667 MHz RAM at the very minimum. Any faster RAM (i.e. DDR2 PC2-6400 800 MHz RAM) will automagically down-clock to the correct PC2-5300 667 MHz speed since the memory will not run any faster than the processor and system board were designed to run.