this product does not have win2k3 x64 drivers are any available or are there other USB 3.0 cards that are compatibile with win2k3 x64?

According to manufacturer, no drivers needed. Server 2003 has compatible drivers built in.

£38^.39

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iStarUSA Host Controller Model SAGE-PCIE-2U3

Specs

Reviews (1)

Model
Brand	iStarUSA
Model	SAGE-PCIE-2U3

Details
Type	PCI to 1394 / USB Card
External USB Ports	2x USB Ports
Data Transfer Rate	Up to 5.0 Gbps
Operating Systems Supported	Windows XP/Vista/2003 Server/2008 Server /Win7 - 32bits Windows XP/Vista/2003 Server/2008 Server - 64bits

Features
Features	Fully compliant with USB 3.0 and xHCI (eXtensible Host Controller Interface) specifications Supports USB 3.0, 2.0 and 1.1 Supports Serial ATA II Port Multiplier 1.0 Specifications revision 1.1.

Additional Information
Date First Available	November 06, 2012

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Warranty Notice:
This product does not include manufacturer warranty when purchased or used outside of its designated sales region. By purchasing internationally, you acknowledge that warranty support from the manufacturer will not be available.