{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/36795"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/36795","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"SCALE DRAM subsystem power analysis","abstract":"To address the needs of the next generation of low-power systems, DDR2 SDRAM offers a number of low-power modes with various performance and power consumption tradeoffs. The SCALE DRAM Subsystem is an energy-aware DRAM system with various system policies that make use of these modes. In this thesis, we design and implement a DDR2 DRAM controller and test a version of the SCALE DRAM Subsystem in hardware. Power measurements from the actual DRAM chips are taken and compared to datasheet derived values, and an analysis of the DRAM refresh requirements is performed. Some notable power consumption results include active powerdown being much closer to precharge powerdown and reads taking much less current than the datasheet indicates. In addition, based on the refresh tests, a system that powers down at least 12.3s for each 32MB of traffic can save power using delayed refresh and ECC data encoding.","abstract_html":"To address the needs of the next generation of low-power systems, DDR2 SDRAM offers a number of low-power modes with various performance and power consumption tradeoffs. The SCALE DRAM Subsystem is an energy-aware DRAM system with various system policies that make use of these modes. In this thesis, we design and implement a DDR2 DRAM controller and test a version of the SCALE DRAM Subsystem in hardware. Power measurements from the actual DRAM chips are taken and compared to datasheet derived values, and an analysis of the DRAM refresh requirements is performed. Some notable power consumption results include active powerdown being much closer to precharge powerdown and reads taking much less current than the datasheet indicates. In addition, based on the refresh tests, a system that powers down at least 12.3s for each 32MB of traffic can save power using delayed refresh and ECC data encoding.","abstract_has_math":false,"creators":["Bhalodia, Vimal"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.","school":null,"contributors":[],"advisors":["Krste Asanović."],"committee_chairs":[],"committee_members":[],"year":2005,"date_issued":"2005","date_published":"2005","updated_at":"2026-07-22T22:22:23Z","subjects":["Electrical Engineering and Computer Science."],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/36795","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Krste Asanović."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science."]},{"key":"dc:contributor.other","label":"Dc Contributor Other","values":["Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science."]},{"key":"dc:creator","label":"Author","values":["Bhalodia, Vimal"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2007-03-12T17:54:27Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2007-03-12T17:54:27Z"]},{"key":"dc:date.issued","label":"Date","values":["2005"]},{"key":"dc:publisher","label":"Institution","values":["Massachusetts Institute of Technology"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Electrical Engineering and Computer Science."]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://dspace.mit.edu/handle/1721.1/7582"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1721.1/36795"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.","Includes bibliographical references (p. 51)."]},{"key":"dc:description.abstract","label":"Abstract","values":["To address the needs of the next generation of low-power systems, DDR2 SDRAM offers a number of low-power modes with various performance and power consumption tradeoffs. The SCALE DRAM Subsystem is an energy-aware DRAM system with various system policies that make use of these modes. In this thesis, we design and implement a DDR2 DRAM controller and test a version of the SCALE DRAM Subsystem in hardware. Power measurements from the actual DRAM chips are taken and compared to datasheet derived values, and an analysis of the DRAM refresh requirements is performed. Some notable power consumption results include active powerdown being much closer to precharge powerdown and reads taking much less current than the datasheet indicates. In addition, based on the refresh tests, a system that powers down at least 12.3s for each 32MB of traffic can save power using delayed refresh and ECC data encoding."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["M.Eng."]},{"key":"dc:title","label":"Title","values":["SCALE DRAM subsystem power analysis"]}]}],"canonical_facts":{"dc:contributor.advisor":["Krste Asanović."],"dc:contributor.department":["Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science."],"dc:contributor.other":["Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science."],"dc:creator":["Bhalodia, Vimal"],"dc:date.accessioned":["2007-03-12T17:54:27Z"],"dc:date.available":["2007-03-12T17:54:27Z"],"dc:date.issued":["2005"],"dc:description":["Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.","Includes bibliographical references (p. 51)."],"dc:description.abstract":["To address the needs of the next generation of low-power systems, DDR2 SDRAM offers a number of low-power modes with various performance and power consumption tradeoffs. The SCALE DRAM Subsystem is an energy-aware DRAM system with various system policies that make use of these modes. In this thesis, we design and implement a DDR2 DRAM controller and test a version of the SCALE DRAM Subsystem in hardware. Power measurements from the actual DRAM chips are taken and compared to datasheet derived values, and an analysis of the DRAM refresh requirements is performed. Some notable power consumption results include active powerdown being much closer to precharge powerdown and reads taking much less current than the datasheet indicates. In addition, based on the refresh tests, a system that powers down at least 12.3s for each 32MB of traffic can save power using delayed refresh and ECC data encoding."],"dc:description.degree":["M.Eng."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/36795"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"dc:rights.uri":["http://dspace.mit.edu/handle/1721.1/7582"],"dc:subject":["Electrical Engineering and Computer Science."],"dc:title":["SCALE DRAM subsystem power analysis"],"dc:type":["Thesis"]},"updated_at":"2026-07-22T22:22:23Z"}