Comments on: The Difference between a Standard DIMM and a CUDIMM or CSODIMM

By: Test

Test — Sat, 25 Jan 2025 09:51:30 +0000

Reduced clock* jitter for* the dram

By: Wayne

Wayne — Sun, 10 Nov 2024 23:42:41 +0000

Yamamoto, sorry, it’s just a clock repeater (with a pll), even has a bypass mode for those ddr phys that dont support the new clock termination requirements.This article is kind of dumb, like AI wrote it.
The idea is to potentially reduce cock jitter at the dram, for those phys that can take advantage of the pll modes, so there is more overall s/h margin for clock dqs /clock dq ac timing requirements.
The good thing about ckdimmn isn’t necessarily the ckd buffer, but that the higher frequencies require better raw cards. The raw cards in turn have more layers, better materials, and a bit bigger cost -which yield higher supported bandwidths.

By: Techload Informática

Techload Informática — Sun, 10 Nov 2024 19:41:09 +0000

This is actually pretty interesting – I work in IT and didn’t realize they were bringing server memory tech to consumer hardware now. Makes total sense though with how fast DDR5 is getting. Those comparison photos really help show the difference – that Montage clock driver chip is pretty obvious once you know what to look for!
I had to laugh a bit at the “memory vendors are winning” comment at the end. Like, of course they’re happy – they get to charge more for these fancy new modules with extra components. But I guess if we want those sweet DDR5-6400 speeds, we gotta pay to play.
One thing I’m curious about though – they mention you need Intel Core Ultra Series 2 or newer. Wonder how much of a performance difference these CUDIMMs actually make in real-world use compared to regular DDR5? Would love to see some benchmarks comparing them.
Pretty solid technical write-up though. Nice to see server tech trickling down to consumer hardware as speeds keep pushing higher.

By: yamamoto

yamamoto — Sat, 09 Nov 2024 22:45:41 +0000

My understanding, it is Client Clock Driver (CKD), which doubles clock frequency by 2.
For example, motherboard sends 3200 MHz (equivalent) clock to the memory module and CKD outputs 6400 MHz (equivalent) clock using PLL.