Gigabit Media Hub / Network data transfer rate speeds

Greetings,

I have recently bought a Media Hub (Linksys NMH300) and a Gigabit router (Linksys WRT320N). Both my computers have 1000mb/s Ethernet cards and the network is connected with Cat6 cables. The network interface status in windows 7 shows proper speeds at 1.0 Gb/s.

Detailed setup:

Media Hub:
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1x1T SAMSUNG HD103UJ
====================================

PC1:
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AMD FX55
A8N-SLI Deluxe
2 GB RAM DDR
160GB WD @ 7200RPM (main HDD with windows 7 32bit)
1T SAMSUNG HD103UJ
Gigabit Ethernet
====================================

PC2:
====================================
Intel i7 965
Rampage II EE
6 GB RAM
2x RAPTOR (300 GB - main HDD with windows 7 64bit) // RAID0
Gigabit Ethernet
====================================


My problem is that the data transfer speeds seems to be really low for a gigabit LAN network. To be more specific when trying to copy something from the computers to the Media Hub the maximum data transfer rate I get is 11MB/s.

I searched the internet found some similar posts but not a clear answer for the cause of this problem.

Any help appreciated.

Thanks,
ImmortalCy