Take the 2-minute tour ×  Normal SSD will expire after some
number of reads and writes. Why is this? And how did they fix it
for DRAM?  share|improve this question Two different
technologies of chips.. explained on wikipedia. Basically RAM is
volatile- it stores its context using an eleictrical charge. SSD
is non-volatile it stores its bit without charge-changing the
materials property physically- which after time will burn out.
Similar to Rewrittable CDroms. –  ppumkin Jan 6 '12 at 12:04  1
Answer 1  Flash does use electric charges (ppumpkin's comment is
wrong). However, they're stored in a Floating Gate. A Floating
Gate is electrically isolated. The upside is that it discharges
very, very slowly (many years). The downside is that to get
electrons in the Floating Gate, you need to apply a very high
voltage. (Hot Electron Injection). This causes damage to the
isolation.  In DRAM, the electric charges aren't isolated like
in Flash cells. They're in fact stored so loosely that they leak
away in seconds. A circu