Retention time can be increased to days or perhaps weeks by cooling to cryogenic temperatures before power down
Actually no, modern DRAM loses information in milliseconds, even assuming you could cool it down to liquid helium temperatures. After a few seconds the data is almost entirely random.
Here’s a citation for the claim of DRAM persisting with >99% accuracy for seconds at operating temperature or hours at LN2. (The latest hardware tested there is from 2007. Did something drastically change in the last 6 years?)
Actually no, modern DRAM loses information in milliseconds, even assuming you could cool it down to liquid helium temperatures. After a few seconds the data is almost entirely random.
Here’s a citation for the claim of DRAM persisting with >99% accuracy for seconds at operating temperature or hours at LN2. (The latest hardware tested there is from 2007. Did something drastically change in the last 6 years?)
Yup, the introduction of DDR3 memory. See http://www1.cs.fau.de/filepool/projects/coldboot/fares_coldboot.pdf