AMD Ryzen 9 9950X3D and 9900X3D to Include 3D V-Cache on Both CCD Chiplets, According to Latest Report

Peter_Brosdahl

Moderator
Staff member
Joined
May 28, 2019
Messages
9,032
Points
113
AMD's first round of AM5 featuring 3D V-Cache technology, most notably the Ryzen 7 7800X3D from 2023, saw significant performance gains over the AM4 Ryzen 7 5800X3D, but its AMD Ryzen 9 9950X3D and 9900X3D processors could be real game changers.

See full article...
 
I think this is a good move.

Core parking just isnt stable (IMO) (maybe stable isnt the right word, finished? Ready?) I click play from steam/Battle.net/GoG or double click an icon on my desktop and I can watch core parking go on/off/on/off as the game loads. Cut Scenes in particular but not just core parking off all activity moving back and forth between CCD 0 and 1. From watching task manage/resource monitor, not gaming pretty much just uses CCD 1 with little or no activity on 0. Not that I push my system much outside games. It's almost like I functionally have two separate CPU's that are exclusively used. With the 3d cache on both dies this would hopefully not happen.

Hmmmm time, I think to see what happens with some bench marks.
 
Yep, assuming true probably what we're all hoping for. Other rumors are an early 2025 release and reveal at CES. I think the hardest part for me will be deciding between 9900 and 9950 X3D.
 
It's mostly a good thing - but the main problems were still inter-CCD latency (cores on separate CCDs had to talk through the IOD) and that the non-X3D CCD clocked quite a bit higher, so the Windows scheduler just couldn't help but move stuff over to it.

We'll still have the inter-CCD latency issue, but with the Zen 5 X3D CCD in the 9800X3D running almost as fast (and effectively faster) than the 9700X, the solutions to keeping games on a single CCD (preferably the X3D CCD) are potentially as easy as just running the non-X3D CCD slower, if say we got a repeat of the 7900X3D / 7950X3D with only one of two CCDs having stacked cache.

Really, the schedular is just going to have to get significantly smarter. Solutions to making performant but efficient CPUs are unlikely to get less complicated over time, IMO.
 
Me too, I was looking forward to getting one of these, and still might, but testing and price will absolutely be the deciding factors on that choice.
 
With the x3d cache's as the bottom layer, I wonder if the tech is there for them to be directly connected (assuming a cache for both CCD's) and if it could be fast enough, perhaps by making it super wide bits wise or some such to alleviate the bandwidth issues. Well some/part of them anyways.

Perhaps one of the new optical interfaces I've read about, though those are prob years of from being in a product.
 
Yeah, I was just perusing the thread over at VideoCardz for this rumor and quite a few folks state how AMD is doing a similar tic-toc strategy that Intel did for years and how the 9800X3D is really the pinnacle for price/performance this gen but it'll be next gen for other models. I don't know but even as excited as I've been about doing a new AM5 build, I'm beginning to think my best bet is to wait for next year.

Gen5 drives - some are on sale now, including $100 off the one I want.
Mem - nothing really happening here yet but this price isn't horrible.
Motherboard(s) - Looking at mini-ITX boards because I want the full feature set, and only one is actually available (ASUS) but for $429-$500, too rich for my tastes but we'll see how it goes. Gigabyte has one coming out for much less, $299, but a 8+2+1 VRM vs ASUS 10+2+1.
 
Peter_Brosdahl said:
Gigabyte has one coming out for much less, $299, but a 8+2+1 VRM vs ASUS 10+2+1.
Click to expand...
Should be meaningless; the ASUS one is probably overkill for marketing. Especially when you're looking at CPUs that top out at 125W-ish?

As far as 'when' to upgrade; well, I'm looking at the 12700K in my desktop, having just played through the new Dragon Age and working the remastered Horizon Zero Dawn, and just not really feeling it. My 3080 12GB is probably a bigger hindrance.
 
LazyGamer said:
Especially when you're looking at CPUs that top out at 125W-ish?
Click to expand...
Normally I'd agree but thinking of dropping a 9950X3D into it. I made a thread for this in the motherboard forum and there's a review with a 9950, it did fairly well in terms of speeds and temps (but things did run a little on the hot side).
 
You must log in or register to reply here.
Become a Patron!
Back
Top