Appreciate the review. I literally just bought a Ryzen 9 7950X3D. I will be using it primarily for flight simulation at a flight school, with a secondary use as an office PC. Did I make a mistake? Should I return the 9 7950X3D for the 7 9800X3d?
I bought mine in early Summer, because I needed a "new" system for one of my kids, which in this case meant that I needed to replace the 5800X3D, I'd pass on
So I no longer have the option to return it for free and selling it now is not only a bother, but perhaps not the greatest trade.
I'd say that at least a Ryzen 9 7950X3D won't put you at a noticeable disadvantage vs a 9800X3D. 8% better gaming performance isn't a giant gap and might actually be somewhat less with a 7950X3D since those CCDs on those tend to be better bins than single CCD CPUs.
And in terms of productivity workloads the non-V-cache CCD on the 7950X3D might match the 9800X3D for up to 8 cores, because it can clock higher, and
then has another 8 cores to throw at the job: I observe both CCDs running at the very same clocks on full loads, so the V-Cache CCD on the 7950X3D doesn't really suffer from lower clocks at this point, because they all have to give up some Watts to stay within socket limits. That's the official reason I chose the 7950X3D over the 7950X. The unofficial was that sometimes I use my RTX 4090 CUDA workstation sometimes for gaming after hours (and the theoretical ability to test some HPC workloads that profit from the bigger cache).
The real kicker might be a 9950X3D, though, but there I'm not even sure that
AMD will actually produce it.
Nor am I sure which form it might take.
They could make it with dual V-cache CCDs, because with the new cache placement productivity won't suffer as much any more, but that wouldn't fly as a gaming chip: nobody is going to create bespoke games to match a dual CCD V-cache CPU and that's what it would take to come out on top. Games that are completely unaware of the dual CCD topology are more likely to suffer than profit.
It
could fill a nice niche in some HPC workloads (e.g. EDA or genomics), but AMD wouldn't want to fill a premium niche with economy parts, when there is no competitor biting its heels. And real HPC isn't done on desktop systems.
And while I'd buy another hybrid variant even for the 9950X3D (if dual V-cache wasn't available and I had to buy new), AMD might still decide not to produce that... a) because they don't need to and b) because they might get more bad press than happy customers.
The hybrid CCD chips require matching workloads and intelligence to use optimally, and both can be scarce, while press and social network vitriol is generated in abundance.
I'd really just advise you to relax (which I also tell myself): real-life gaming performance isn't typically bottlenecked by CPU performance these days. Nearly everything you can buy today, and quite a few CPUs far older are quite capable of handling any game currently out there, while games with more exceeding CPU demands would face a customer niche far too small to make them worth designing: mainline is still defined by the consoles and those concentrate their effort on the GPU side of things, where the actual gains are.
I bought a CPU monster, because it earns its money doing CPU things. The V-cache was just a bit of a cream topping that didn't sacrifice CPU headroom significantly.
And if AMD won't do 9950X3D chips of either kind, the 7950X3D might just see a bit of a bloom on the used parts market later!