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The XT has a desktop case similar to that of the IBM PC. It weighs {{convert|32|lb}} and is approximately {{convert|19.5|in|cm}} wide by {{convert|16|in|cm}} deep by {{convert|5.5|in|cm}} high.
Similarly to the original IBM PC, the XT main board included a socket for the [[Intel 8087]] [[floating point]] arithmetic [[coprocessor]]. This optional chip, when installed, greatly accelerated arithmetic for such applications as [[computer aided design]] or other software that required large amounts of arithmetical calculations. Only software that was especially written to take advantage of the coprocessor would show a significant speedup. {{ref name=Mueller92}}
The [[Power supply unit (computer)|power supply]] is 130 watts, an upgrade from the original PC. Those sold in the US were configured for 120 V AC only and could not be used with 240 V mains supplies.<ref name="Mueller92">{{cite book |first=Scott |last=Mueller |title=Upgrading and Repairing PCs |edition=2nd |publisher=Que Books |year=1992 |isbn=0-88022-856-3 |pages=59–79}}</ref> XTs with 240 V-compatible power supplies were later sold in international markets. Both were rated at 130 watts.<ref name="sim62" />
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