IE 32-bit vs IE 64-bit

We have a Windows server 2012 R2 that we are using to virtualize a Windows 2008 R2 server via Hyper-V.

In the users RDP sessions I have noticed that they are running both the 32 and 64 bit version of IE.  I have been told that to optimize performance and to take advantage of the multiple threads of our hexacore processors, we should only run the 64-bit version.   However when I tested running both versions, regardless of the version I launch, I noticed in the task manager that sometimes it loads as the 32-bit version and sometimes it loads as the 64-bit version even if I launch it from the same shortcut.

Does anyone have any ideas if this is controllable or is it due to perhaps some applications/processes requiring the 32-bit version of IE?
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JohnBusiness Consultant (Owner)Commented:
IE 64-bit needs most everything around it to be 64-bit and this goal remains impractical. Accordingly, I just use IE 32-bit and it works as well as 64-bit. I have not seen performance issues. So in answer to your last question, yes, some applications/processes require IE 32-bit, so just use that version and do not use IE 64-bit.

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It may partly have to do with plugin support.

I'm sort of annoyed that it's taking so long to move entirely to 64 bit apps in Windows, especially within Microsoft itself.
David Johnson, CD, MVPOwnerCommented:
The standard rule is still to use the x86 versions (ie/office) due to comparability issues with x64 versions.
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Windows Server 2012

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