What did we have before Double Data Rate Memory? (DDR)

[Alec Denston]

What did we have before DDR ram in computers?

[Moldy]

I believe it was called SDRAM. It ran at sigle stick speeds. DDR ram works twice as fast because both sticks can be accessed simultaniously, hence double the latency.

[Washell]

https://en.wikipedia.org/wiki/Dynamic_random-access_memory#Versions

[Bad 💀 Motha]

SDRAM (66 / 100 / 133 Mhz) (Intel Pentium 2 / 3, AMD Slot-A)
RDRAM (Designed for Intel Chipset; had to be installed in pairs)
DDR (266 / 333 / 400 Mhz) (Intel Pentium 3 / 4, AMD Socket-A / Socket-754 AMD64)
DDR2 (533 / 667 / 800 Mhz) (Intel LGA-775, AMD Socket-939 / AM2)
DDR3 (1333 - 3200 Mhz)
DDR4 (2133 - 3400 Mhz)

Generally with DDR, these when installed in proper paired configs; then allow for Dual-Channel Mode (128-bit (twice as much data per read/write cycle); instead of 64-bit Single-Channel)

[Alec Denston]

Oh thank you all for the answers, it definitley helped me with my studies in my IT class!

[Bad 💀 Motha]

Yea look up that sort of stuff in Wikipedia; lots of in-depth info

[Alec Denston]

Originally posted by Alec Denston:

Oh thank you all for the answers, it definitley helped me with my studies in my IT class!

Thx

[_I_]

how about the good old edo ram

and the dip ram chips
had good times replacing those and findng out which were bad

[Bad 💀 Motha]

Originally posted by _I_:

how about the good old edo ram

and the dip ram chips
had good times replacing those and findng out which were bad

Good to see someone else remembers those; what a pain they were.

Now we look "old" for sure...

[_I_]

and rambus (rdram), that lasted about a year?
0m ram moodules, yay (because all slots had to be filled)

[vadim]

All DDR are also SDRAM (synchonous dynamic as opposite to SRAM - static RAM). Before DDR it was SDR, but noone really used this name.