Crucial.com and look it up. I see 16GB at http://www.crucial.com/usa/en/compatible-upgrade-for/Samsung/dp500a2d-a01uk
No maker seems to support CPU changes and I defer to folk that will discuss it. I find it rarely helps if the person was looking to improve, say gaming.
-> I'd try something else if it's just speed you need (gaming? Tell more!) I'd shop for a new SSD to replace the slower HDDs. Just last week I picked up 512GB SSDs for 119.99USD and they will give some old machine a boost.
Does anyone know the Max CPU & Memory upgrade options for the above system .. I've looked about but can only find various upgrade options for memory - ranging from total 8GB to 16GB.
Cheers in advance.