Title: LaurieWired on X: "I just can’t get over how neat CXL type 3 is. 

Imagine having a 1TB bucket of memory.

But! Instead of 1TB of DDR5, you have a tiered CXL accelerator. To the OS, it *looks* like regular memory, you address it in the same way.

Maybe your accelerator is actually 100GB of DDR5, https://t.co/M8fsgHzYWn" / X

URL Source: http://x.com/lauriewired/status/2058257702695154058?s=20

Markdown Content:
# LaurieWired on X: "I just can’t get over how neat CXL type 3 is. Imagine having a 1TB bucket of memory. But! Instead of 1TB of DDR5, you have a tiered CXL accelerator. To the OS, it *looks* like regular memory, you address it in the same way. Maybe your accelerator is actually 100GB of DDR5, https://t.co/M8fsgHzYWn" / X

Don’t miss what’s happening

People on X are the first to know.

[Log in](http://x.com/login)

[Sign up](http://x.com/i/flow/signup)

# [](http://x.com/)

## Post

See new posts

# Conversation

[![Image 1](https://pbs.twimg.com/profile_images/1908388716621815809/XQHY6X1-_normal.jpg)](http://x.com/lauriewired)

[LaurieWired](http://x.com/lauriewired)

[@lauriewired](http://x.com/lauriewired)

I just can’t get over how neat CXL type 3 is. Imagine having a 1TB bucket of memory. But! Instead of 1TB of DDR5, you have a tiered CXL accelerator. To the OS, it *looks* like regular memory, you address it in the same way. Maybe your accelerator is actually 100GB of DDR5, and ~1TB of high bandwidth flash. The first 100GB is your buffer, and a little controller slowly flushes it out. Many, many workloads are not hammering RAM enough for you to notice. Wait! You could get even more clever. With regular memory, bouncing cachelines between CPU cores is annoying. Often, you’ll program your way around this (avoiding a shared counter) by having each thread maintain a temporary local state with occasional global syncs. But, if we have a custom CXL 3 memory device, that slow global merge could be implemented in hardware instead. You’d never have to have cores fight over the same cacheline, because the shared-counter would be local to the CXL device! Aka, a remote atomic! This is essentially the concept of NDP (near-data processing), and of course there are much, much more fancy algorithms you can do with it, that’s just one example. But you can imagine, especially with database-style operations, how much bandwidth you could save not having to round-trip to the CPU and back for every operation. Imagine if your RAM could run a regex for you! We’re getting really close to that world.

[![Image 2: Image](https://pbs.twimg.com/media/HJBk3M8bAAAsz9a?format=png&name=small)](http://x.com/lauriewired/status/2058257702695154058/photo/1)

[![Image 3: Image](https://pbs.twimg.com/media/HJBmbFRbgAARs0r?format=jpg&name=small)](http://x.com/lauriewired/status/2058257702695154058/photo/2)

[6:44 PM · May 23, 2026](http://x.com/lauriewired/status/2058257702695154058)

·

[18.2K Views](http://x.com/lauriewired/status/2058257702695154058/analytics)

20

33

511

145

Read 20 replies

## New to X?

Sign up now to get your own personalized timeline!

Sign up with Apple

[Create account](http://x.com/i/flow/signup)

By signing up, you agree to the [Terms of Service](https://x.com/tos) and [Privacy Policy](https://x.com/privacy), including [Cookie Use.](https://help.x.com/rules-and-policies/twitter-cookies)

## Relevant people

*     [![Image 4](https://pbs.twimg.com/profile_images/1908388716621815809/XQHY6X1-_normal.jpg)](http://x.com/lauriewired)       [LaurieWired](http://x.com/lauriewired) [@lauriewired](http://x.com/lauriewired)    Follow   Click to Follow lauriewired  researcher [@google](http://x.com/google) ; serial complexity unpacker; [http://youtube.com/@lauriewired](https://t.co/Vl1seeNgYK) ex @ msft & aerospace   

# Trending now

## What’s happening

Sports · Trending

Freddy Peralta

Trending in United States

Dart

Trending with [Abdul](http://x.com/search?q=Abdul&src=trend_click&vertical=trends), [Giants](http://x.com/search?q=Giants&src=trend_click&vertical=trends)

Trending in United States

Bello

Trending in United States

Kelce

[Show more](http://x.com/explore/tabs/for-you)

[Terms of Service](https://x.com/tos)

|

[Privacy Policy](https://x.com/privacy)

|

[Cookie Policy](https://support.x.com/articles/20170514)

|

[Accessibility](https://help.x.com/resources/accessibility)

|

[Ads info](https://business.x.com/en/help/troubleshooting/how-twitter-ads-work.html?ref=web-twc-ao-gbl-adsinfo&utm_source=twc&utm_medium=web&utm_campaign=ao&utm_content=adsinfo)

|

More

© 2026 X Corp.