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Amazon.com: HP Z840 Workstation, 2X Intel Xeon E5-2678 v3 up to 3.1GHz (24 Cores Total), 256GB DDR4, 4X 1TB SSD, Quadro M2000 4GB (4X Display Ports), USB 3.0, Windows 10 Professional 64-bit (
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HP Z840 Workstation Mini-tower Server System 2 x Intel Xeon E5-2620 v3 2.40 GHz 16GB DDR4-2133/PC4-17000 Windows 7 Professional Upgradable to Windows 8.1 Pro (English) K7P09UT - Newegg.com
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