New iMac 21" with Windows 7 64bit - NIC speed only 100Mbps

Odd issue. I have a new 21" iMac with Windows 7 64bit installed (fresh) but can only get the NIC to transmit at 100/10Mbps. I have another older 20" iMac on the network running Windows XP which is connected at 1Gbps. I've installed the newest Broadcom drivers for the Windows 7 machine but it only connects at the lower speed. I've replaced the CAT5 cable as well. I'm still researching this issue.
NIC Speed Value (ScreenShot)
http://i56.tinypic.com/29pdpp3.jpg

Welcome to the Apple Support Communities
It's the inverse. The Late 2012 iMac is only compatible with 64-bit Windows versions in Boot Camp. The main reason is the memory: the iMac comes with 8 GB of memory, and a 32-bit Windows version can only detect 4 GB or less. Also, it's time to upgrade to 64-bit operating systems, that works with both 32 and 64-bit applications.
If you want to use a 32-bit Windows version, the only solution is to install Parallels, VMware Fusion or VirtualBox, and install Windows in a virtual machine

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New iMac 21" with Windows 7 64bit - NIC speed only 100Mbps

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