SSL File Transport Faster then Unsecure File Transport

I am have a extremely ODD issue.

I have a qnap NAS, and a Server 2008 R2 Server.

the server 2008 r2 is extremely slow at downloading files (from any source) over http, smb, and ftp...but it runs at expected speeds over https and sftp.

I use the qnap nas to do some testing so drive speed and networking would be always the same.

Download speeds on HTTPS and SFTP are about 10MB/s
Download Speeds on FTP,SMB, and HTTP are ALL about 500KB/s
Upload speeds on all transports are the same (about 8MB/s)

Any Ideas would be appreciated.

(physical server, although irrelevant, I have tested multiple times and results are consistent)
HIGAdminsAsked:
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HIGAdminsConnect With a Mentor Author Commented:
it was the switch, still makes no sense.
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AlexPaceCommented:
What if it is scanning for threats in the clear text protocols like FTP and HTTP but, since SFTP and HTTPS are encrypted it doesn't attempt to evaluate the data stream?

This explanation has the ring of truthiness.  http://en.wikipedia.org/wiki/Truthiness
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HIGAdminsAuthor Commented:
Reloaded switches, speed restored.
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