A shieldless, high-speed electrical connector is disclosed. Such a connector may include a first column of electrical contacts comprising a first arrangement of differential signal pairs separated from one another by first ground contacts, and a second column of electrical contacts adjacent to the first column, the second column of electrical contacts comprising a second arrangement of differential signal pairs separated from one another by second ground contacts. The connector may be devoid of electrical shield plates between the first column of electrical contacts and the second column of electrical contacts. The connector may be capable of transferring differential signals at data transfer rates of at least ten gigabits per second through the connector while producing no more than an acceptable level of cross talk on any of the differential signal pairs.