Smallest Functional commercial desktop is the OptiPlex 780 Ultra Small Form Factor (USFF) PC. The OptiPlex 780 is a product from Dell with integrated Intel vPro technology and power supply. Powered by Intel Core 2 Duo processor, 128GB SSD or 2.5-inch 320GB storage capacities.

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This Dell’s OptiPlex 780 USFF PC comes with 4GB RAM and Intel GMA4500 graphics, with VGA output, display port and an eSATA port.

Price: USD629.-