Nope. Windows 2000, Windows XP Pro, and Linux support 2cpus
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DFI LP UT NF4 Ultra-D I BIOS 704-2BTA Athlon 64 X2 3800 LCBKE 0643 @ 3000 MHz TR Ultra 120 Extreme I 2 X 1 Gig G.Skill DDR500 PC Power and Cooling 510-XE I EVGA 7800GT