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===Server designs ===
Two years after the Open Compute Project had started, with regards to a more modular server design, it was admitted that "the new design is still a long way from live data centers".<ref>{{Cite magazine |title= Facebook Shatters the Computer Server Into Tiny Pieces |date= January 16, 2013 |first= Cade|last= Metz |magazine= Wired |url= https://www.wired.com/wiredenterprise/2013/01/facebook-server-pieces/ |access-date= July 9, 2013 }}</ref> However, some aspects published were used in Facebook's Prineville data center to improve energy efficiency, as measured by the [[power usage effectiveness]] index defined by [[The Green Grid]].<ref name="Stanford">{{Cite web |title= Facebook's Open Compute Project |work= Stanford EE Computer Systems Colloquium |date= February 15, 2012 |url= http://www.stanford.edu/class/ee380/Abstracts/120215.html |first= Amir|last= Michael |publisher= [[Stanford University]]}} ([http://ee380.stanford.edu/cgi-bin/videologger.php?target=120215-ee380-300.asx video archive])</ref>
Efforts to advance server compute node designs included one for [[Intel]] processors and one for [[Advanced Micro Devices|AMD]] processors. In 2013, [[Calxeda]] contributed a design with [[ARM architecture]] processors.<ref>{{Cite web |title= ARM Server Motherboard Design for Open Vault Chassis Hardware v0.3 MB-draco-hesperides-0.3 |first= Tom |last= Schnell |date= January 16, 2013 |url= http://www.opencompute.org/wp/wp-content/uploads/2013/01/Open_Compute_Project_ARM_Server_Specification_v0.3.pdf |access-date= July 9, 2013 |archive-url= https://web.archive.org/web/20141023095543/http://www.opencompute.org/wp/wp-content/uploads/2013/01/Open_Compute_Project_ARM_Server_Specification_v0.3.pdf |archive-date= October 23, 2014 |url-status= dead }}</ref> Since then, several generations of OCP server designs have been deployed: Wildcat (Intel), Spitfire (AMD), Windmill (Intel E5-2600), Watermark (AMD), Winterfell (Intel E5-2600 v2) and Leopard (Intel E5-2600 v3)<ref>{{Cite web |title=Guide to Facebook's Open Source Data Center Hardware|author=Data Center Knowledge|date=April 28, 2016|url=http://www.datacenterknowledge.com/archives/2016/04/28/guide-to-facebooks-open-source-data-center-hardware/|access-date=May 13, 2016}}</ref><ref>{{Cite web |title=Facebook rolls out new web and database server designs|first=The|last=Register|website=[[The Register]] |date=January 17, 2013|url=https://www.theregister.co.uk/2013/01/17/open_compute_facebook_servers/|access-date=May 13, 2016}}</ref>
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