Ram to buy for Laptop Toshiba Satellite

I just bought a cheap-o laptop for email/web, etc stuff (low powered stuff).

The specs are:

Processor Type AMD E2-1800
Processor Cores 2
Processor Speed 1.7 GHz
Processor Cache 1 MB
Storage & Memory
Hard Drive Capacity 640 GB
Hard Drive Speed (Revolutions Per Minute) 5400 rpm
RAM Size 4 GB
RAM Type DDR3
RAM Speed 1333 MHz
RAM Slots 2 (1 Available)

http://www.bestbuy.ca/en-CA/product/toshiba-toshiba-satellite-c870-17-3-laptop-featuring-amd-e2-1800-processor-c870d-00g-black-c870d-00g/10207818.aspx

Is there any value in buying more RAM with the low end processor the laptop comes with as there is an empty ram slot… will I see any gains with another 4gigs of ram?

if so how do I know the correct/compatible RAM to buy and how much can I buy?

Currently it came with 4gig DDR3:

Memory
Standard Memory: 4GB DDR3 (1333MHz)
Slot1: 4GB DDR3 (1333MHz)
Slot2: None
Maximum Memory: 8GB DDR3
Expansion Modules: 2GB DDR3, 4GB DDR3 or 8GB DDR3

Does the above mean I can only add another 4Gigs of DDr3 for a total of 8?

thanks

Not sure regarding the RAM upgrade (I’m assuming you can only drop in another 4GB stick) but I would pull the trigger on a SSD before the RAM upgrade. The improvement over the 5400 RPM HDD would be/is very noticeable.

Edit:

A quick google showed up this: