More RAM

My Sentinel has 2 GB of RAM. Can I add more?

See this post:

You can upgrade to 4GB, however the DX4000 is not supported for internal user upgrades. It requires removing about 13 screws and very carefully handling the system board. But, for about $30 give or take, a good, cheap upgrade.

i use 4G ram,now!

not support 8G