lemmington_steele@lemmy.world to Explain Like I'm Five@lemmy.worldEnglish · 11 months agoWhy do SSDs have a more limited number of times data can be written to them, but RAM memory can handle loads of re-writes?message-squaremessage-square47fedilinkarrow-up1184arrow-down14file-text
arrow-up1180arrow-down1message-squareWhy do SSDs have a more limited number of times data can be written to them, but RAM memory can handle loads of re-writes?lemmington_steele@lemmy.world to Explain Like I'm Five@lemmy.worldEnglish · 11 months agomessage-square47fedilinkfile-text
minus-squareAlmightySnoo 🐢🇮🇱🇺🇦@lemmy.worldlinkfedilinkEnglisharrow-up9arrow-down1·edit-211 months agoIn a RAM you’re just trapping current in a loop inside a logical circuit and the state that you get, since it will be stable until it’s reset, is just a memorized 1 bit. You’re not changing anything physical there. See: https://en.wikipedia.org/wiki/Memory_cell_(computing) (not an ELI5 though) Wikipedia animation of a basic logical circuit that allows you to do that using NOR gates:
minus-squareJajcus@kbin.sociallinkfedilinkarrow-up3·11 months agoThat is static RAM (SRAM). Most RAM in computesr is DRAM, which works a bit differently and is much cheaper and denser, but more difficult to operate.
In a RAM you’re just trapping current in a loop inside a logical circuit and the state that you get, since it will be stable until it’s reset, is just a memorized 1 bit. You’re not changing anything physical there.
See: https://en.wikipedia.org/wiki/Memory_cell_(computing) (not an ELI5 though)
Wikipedia animation of a basic logical circuit that allows you to do that using NOR gates:
That is static RAM (SRAM). Most RAM in computesr is DRAM, which works a bit differently and is much cheaper and denser, but more difficult to operate.