LPDDR5X Memory Announced - How FAST IS IT!??

LPDDR5X has just been announced by JEDEC, they develop the standards for the microelectronics industry and the speeds are a huge improvement over LPDDR4/4X and 5.

Chapters
0:00 Intro
0:52 LPDDR5X announcement
3:02 Difference between LPDDR and DDR
4:30 Features of LPDDR5X
5:41 LPDDR5X speeds comparison
8:30 DDR4 memory scaling for comparison

Discord
JimRPG Hangout - Discord Server Invite Link

Resources

Videocardz article

Casual Game Test and Benchmark video

[joesaiditstrue]

Most LPDDR environments (95%+ of hardware setups) use a dual 32bit bus vs what you see on desktop which uses a dual 64bit bus, or in HEDT it's quad 64bit

LPDDR4X 4266 is actually the equivalent of DDR4 2133 (There are other differences between the two, this is a simple explanation) Unless it's configured in a quad 32bit bus setup

The Steam Deck uses LPDDR5 5500 in the rare instance of a quad channel 32bit bus, so it's the equivalent of a desktop standard DDR5-5500 dual channel 64bit configuration

This is the one glaring benefit the Steam Deck has over current gen handheld PCs. They're fairly hamstrung when it comes to memory bandwidth as the OneX series, GPD series and Aya Neo all (to my knowledge) use a dual 32bit channel bus. That 4266x looks like a big number, but because it's on a slower 32bit bus, it's only half as fast as desktop memory

Also, to touch on your point about APUs scaling well with memory bandwidth, it's because they use system memory rather than a dedicated pool of high clock speed (and high latency) graphics memory

I'm really excited about the Steam Deck, my only complaints are that they're using a standard LCD vs OLED/AMOLED, and that the system is capped at 15w :(

[antoniogglesal]

@5:41 where did he get the 128 bit bus? Is the memory bandwidth of LPDDR5 a 128 bit standard?

[_____alyptic]

So steamdeck won't have the new refreshed LPDDR5 spec? 🤔 (Not X)

It would be confusing if they eventually switched to that somewhere in later models as manufacturers sometimes do with this stuff.

[greggreg]

Interesting as always, yesterday i was thinking about ddr5 so i overclcked my RAM, i need speed! From 3200C16 to 3733C17, it's 32gb and that Hynix die is pretty bad, plus i don't nave much experience with RAM OC.

[matthewfamulski]

when do you think will see quad data rate ram ?

[RichardPhillips]

I'm kinda a noob these days I really don't understand why I need to care about memory performance anymore, it doesn't seem a limiting factor anymore, unless you overclock Ryzen?