[tfouto]

I want to buy a D54250WYK but I don't know how many ram I need. I want to play all the video formats , included 4k in the future. Should I go for 2x2gb RAM or 2x4gb RAM?

I think twin modues (2x2gb) are better than one ( a 4gb module alone), isn't it?

1.000 Thanks.

It's not certaint that it might run 4k in the future. h264, yes it should run, but 4k h265 only if there is sufficient dxva support. CPU alone it wont be able.

You can also go for 1x4. And buy another 4gb later if you want. 4gb should be more than enough.