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Your Computer has 2 memory slots and it can accommodate maximum of 8GB of memory.
For any upgrade compatibility issue you can refer to the below link.
Parts and Upgrade: - accessories.us.dell.com/.../DellPartsFamily.aspx
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Although unsupported the part is available on crucial here.
Sometimes you can put more memory in than Dell state as maximum, I have put 4 GB in an older laptop that stated 2 GB was the maximum and could use 3.25 GB fine.
nope... you just need to check your CPU to verify the max ram.
As soon as I put it in, the BIOS picked it up and it was available in Windows. I think both memory sticks need to be identical. I bought a 2x8 16gb kit from Microcenter.
To found what is the maximum memory that your machine can support check your CPU version
in my case i have a intel i7-2720QM, Dell say that my E6520 support a maximum of 8 GB but intel say that with this CPU it can support a amount of 32 GB