Ghon19 :
I have no idea what the differences are. Since now, thanks for sharing your knowledge
There is no significant difference as far as I know. You'll lose some bandwidth if you go with the single 8gb ram stick. The dual 4gb ram stick is a bit faster but is really unnoticeable. But, if you have two 4gb ram sticks, you'll only be able to expand to 16gb. While if you have one 8gb ram stick, you can expand up to 32 gigabytes of ram.