Is there a reason that you need a full 64-bit implementation?
So far I have managed to install all 64-bit software on my server. Adding 32-bit modules mixed in with my current 64-bit Apache modules is just asking for problems. If a 64-bit version is available it will save me a lot of time. Otherwise, when errors occur it is difficult to determine if the problem is because of the mismatch or something else. Since I'm sure there must be a compiled 64-bit version somewhere, that is the way I would like to proceed.
In general, if you're going to use the Subversion modules with Apache then they need to be compiled using the same compilation environment as Apache was compiled with (including the same Apache source include files, etc. Any other alternative is going to be less reliable.
I'm not sure where you got your Apache from but it's best to look to there to get your Subversion.
[QUOTE=gpoirier;n79612]I am looking a 64-bit version of the Subversion Server to run under Apache on a Windows server. Where can I find one? I already have a 64-bit Apache Server running.[/QUOTE]
VisualSVN Server has 64-bit and 32-bit versions: [URL]https://www.visualsvn.com/server/download/[/URL]
The list of Subversion server packages is available at [URL]https://subversion.apache.org/packages.html#windows[/URL]