actually they are saying it support e6520 and i am not sure if there is any difference between e6520&e6540 in wifi card but afew days ago i opened up my laptop and i found mini-express E wifi card matchs exactly with what youtubers saying to remove it, and iam quite nervous it's enough to make it running well ?You would need to check with the vendor of the egpu you are looking to get. There are quite a few laptops that don't work well or at all with them.