My laptop (MSI S430-AX2) has a transcend 1gb so-dimm model JM667QSJ-1G installed. i upgraded another 1gb ram, same brand but this time it's model JM667QSU-1G. they are similar in everything, latency, etc, but the only difference is the number...

I have an msi S430 a little over a year old...no warrenty. The fan went on it quite some time ago but I always ran a usb fan that has 2 big fans under it and it worked fine.....then...the laptop got dropped and it wouldn't stay running for ...