DMS-59

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DMS-59 connector.
DMS-59 connector pinout details
DMS-59 to dual VGA adapter

DMS-59 (Dual Monitor Solution, 59 pins) is generally used for computer video cards. It provides two DVI or VGA outputs in a single connector. An adapter cable is needed for conversion from DMS-59 (digital) to DVI (digital) or VGA (analog), and different types of adapter cables exist. The connector is four pins high and 15 pins wide, with a single pin missing from the bottom row, in a D-shaped shell, with thumbscrews.

The advantage of DMS-59 is its ability to support two high resolution displays, such as two DVI Single Link digital channels or two VGA analog channels, in a single DVI-size connector. The compact size lets a half-height card support two high resolution displays, and a full-height card (with two DMS-59 connectors) up to four high resolution displays.

The DMS-59 connector is used by ATI, NVIDIA, and Matrox for video cards sold in Lenovo Thinkcentres, Viglen Genies and Omninos, Dell, HP, and Sun computers. Some confusion has been caused by the fact that vendors label cards with DMS-59 as "supports DVI", but the cards have no DVI connectors built-in. Such cards, when equipped with only a VGA connector adapter cable, cannot be connected to a monitor with only a DVI-D input. A DMS-59 to DVI adapter cable needs to be used with such monitors.

The DMS-59 connector is derived from the Molex Low Force Helix connector, which could be found in some earlier graphics cards. These ports are similar to DMS-59, but have all 60 pins present, whereas DMS-59 has one pin (pin 58) blocked. A connector plug with all 60 pins (such as a Molex 88766-7610 DVI-I splitter) does not fit into a properly keyed DMS-59 socket.

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