It supports Dx10 also mate, my dxdiag..

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System Information
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Time of this report: 1/28/2011, 10:56:29
Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7600) (7600.win7_gdr.100618-1621)
Language: English (Regional Setting: English)
System Manufacturer: Gigabyte Technology Co., Ltd.
System Model: EP45-DS4
BIOS: Award Modular BIOS v6.00PG
Processor: Intel(R) Core(TM)2 Quad CPU Q8300 @ 2.50GHz (4 CPUs), ~2.5GHz
Memory: 4096MB RAM
Available OS Memory: 4094MB RAM
Page File: 1617MB used, 6569MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
User DPI Setting: 120 DPI (125 percent)
System DPI Setting: 96 DPI (100 percent)
DxDiag Version: 6.01.7600.16385 64bit Unicode