# Arm's C2-Ultra, G2-Ultra NX, and CSS N4 IP

DevFeed: [Arm's C2-Ultra, G2-Ultra NX, and CSS N4 IP](<https://devfeed.tech/articles/arm-s-c2-ultra-g2-ultra-nx-and-css-n4-ip-13988.md>)

Original publisher: [Read original article](<https://chipsandcheese.com/p/arms-c2-ultra-g2-ultra-nx-and-css>)

Author: George Cozma

Published: 2026-09-08T02:00:00Z

Content type: article

Language: en

Sources: [Chips and Cheese](<https://devfeed.tech/sources/chips-and-cheese.md>)

Topics: [Arm](<https://devfeed.tech/topics/arm.md>), [cpu](<https://devfeed.tech/topics/cpu.md>), [Hardware](<https://devfeed.tech/topics/hardware.md>), [Support](<https://devfeed.tech/topics/support.md>)

Tags: [arm](<https://devfeed.tech/tags/arm.md>), [cpu](<https://devfeed.tech/tags/cpu.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [performance](<https://devfeed.tech/tags/performance.md>)

## AI overview

The article examines Arm's C2-Ultra CPU core, G2-Ultra NX GPU IP, and Neoverse CSS N4 IP. It compares C2-Ultra with earlier Arm cores and discusses claimed performance gains, while noting that the figures come from FPGA simulations and depend partly on clock speed and cache configuration. An editor's note states that the maximum IPC increase over C1-Ultra is 7% under the cited parameters.

## Source excerpt

Editor's Note (9/8/2026): Arm has reached out to clarify that the maximum IPC increase of the C2-Ultra core over the C1-Ultra core using the parameters shown in the endnotes is 7% along with the memory bandwidth improvement not factoring into the IPC improvement.