Technologies for providing power to a rack

A data center comprising:

• a rack comprising:
• a first and a second elongated support post, wherein each elongated support post extends vertically,
• a first elongated support arm coupled to the first elongated support post, wherein the first elongated support arm extends outwardly from the first elongated support post,
• a second elongated support arm coupled to the second elongated support post, wherein the second elongated support arm extends outwardly from the second elongated support posts, wherein the first elongated support arm and the second elongated support arm cooperate to define a sled slot to receive a corresponding sled,
• a power supply coupled to the first elongated support arm, wherein the power supply is associated with the sled slot and includes a sled-side power connector;
• and
• a sled mounted in the sled slot, wherein the sled includes a chassis-less circuit board substrate and a power connector coupled to the chassis-less circuit board substrate, wherein the power connector is mated to the sled-side power connector of the power supply to receive power from the power supply.

A rack to support a plurality of sleds, the rack comprising:

• two elongated support posts that extend vertically;
• a plurality of pairs of elongated support arms, wherein each pair of elongated support arms comprises a first support arm that extends outwardly from a first support post of the two elongated support posts and a second support arm that extends outwardly from a second support post of the two elongated supports posts, wherein each pair of elongated support arms defines a sled slot to receive a corresponding sled;
• a power supply housing coupled to each first elongated support arm, wherein each power supply housing comprises an access opening and a power connector located within the corresponding power supply housing;
• and
• a power supply received in each power supply housing, wherein each power supply comprises chassis-less circuit board substrate having a rack-side power connector mated with the power connector of the power supply housing and a sled-side power connector to mate with a power connector of the corresponding sled when the corresponding sled is received in corresponding sled slot to supply power to electrical components of the corresponding sled, wherein the chassis-less circuit board substrate is removable from the corresponding power supply housing via the access opening of the corresponding power supply.