Hi,

I have Dell Optiplex 755 DT model. Currently installed with 4 GB (2 x 2GB modules). I would like to upgrade to 8 GB by adding another 2x 2GB memory modules.

1. Can someone tell the compatible memory modules available in the market? Also, does it matter if the old and new memory modules have different clock frequency (i.e. 667 Vs 800 Mhz).

Also, I hve 160GB HDD currently installed.

2. Can I also upgrade the HDD by adding an internal SSD Hard drive?

Thanks,

-Bala