4 ms·
This is a short article about allowing RAM sizes that aren't powers of 2, like 24 GB or 48 GB instead of just the steps 8 GB, 16 GB, 32 GB. I initially thought
by timerol 4y ago
This is a short article about allowing RAM sizes that aren't powers of 2, like 24 GB or 48 GB instead of just the steps 8 GB, 16 GB, 32 GB. I initially thought this was going to be about using multiple states on the data pins to encode more bits per clock.
- formerly_proven 4y agoGDDR6X uses PAM-4 - I think it's the first memory technology to do so.
- MuffinFlavored 4y ago> PAM-4 > Pulse Amplitude Modulation 4-level (PAM4) is a multilevel signal modulation format used to transmit signal. Each signal level can represent 2 bits of logic information. > NRZ > Non-Return-to-Zero (NRZ), also called Pulse Amplitude Modulation 2-level, is a binary code using low and high signal levels to represent the 1/0 information of a digital logic signal. NRZ can only transmit 1 bit, i.e. a 0 or 1, of information per signal symbol period. How is PAM4 not just 2 "NRZ"?
- Dylan16807 4y ago> How is PAM4 not just 2 "NRZ"? Because it's on one wire. (Or one wire pair for differential systems.)
- pclmulqdq 4y agoThere is some talk of PAM-3 or PAM-4 for DDR6, too, but it has nothing to do with array size or how data is stored - it's just the transfer format.
- TheDudeMan 4y agoI thought it was going to be about non-binary RAM: RAM cells that store information in one of 3+ states.
- deleted 4y ago[deleted]
- hinkley 4y agoWhile it's possible to implement either of these, it made more sense to me that it would be both.