How do I optimize this EF query and implement paging?

I have about 14,000 rows of data. If use the following EF query, its a long time to load because I suspect it is loading all 14,000 rows and only then is any additional filtering done. This is my Select method in my repository.

Public Function SelectAll() As IEnumerable(Of be_Posts) Implements IPostRepository.SelectAll
       Dim posts As IEnumerable(Of be_Posts)
       Using db As Ctx = New Ctx
           posts = db.be_Posts.OrderByDescending(Function(x) x.DateCreated).ToList
           Return posts
       End Using

And Controller:

Function Index(page As Integer?) As ActionResult
        Dim PageSize = System.Web.Configuration.WebConfigurationManager.AppSettings("PageSize")
        Dim pageNumber As Integer = If(page, 1)
        Dim posts = _repo.SelectAll()
        Return View(posts.ToPagedList(pageNumber, PageSize))
    End Function

Helper in View:

@Html.PagedListPager((Model), Function(page) Url.Action("Index", New With { _
       .page = page _
        }), PagedListRenderOptions.ClassicPlusFirstAndLast)

Now If add in a take clause, for example .Take(500) then things are dramatically faster. How can I make this query faster and still work will all the records? I am also using Troy Goode's PagedList extension to get paging functionality. Everything is fine as long as i get just a few hundred records. So what to do? Most if not all examples of paging that I can find that use Troy's library involve all the code directly in the controller.

Calling ToList executes the query and, as you say, it's getting every record. Paging is done using Skip and Take, e.g.

Dim page = list.Skip(pageSize * (pageNumber - 1)).Take(pageSize)

The source list can be the table itself or the result of a Where or OrderBy call or whatever. Just make sure that ToList or, preferably, ToArray is called last.