Wednesday, March 6th 2024

AMD Ryzen 9 7900X3D 12-core Processor Drops to $389

by
btarunr
 Discuss (38 Comments)
AMD's 12-core/24-thread Ryzen 9 7900X3D processor that comes with 3D Vertical Cache technology, is seeing a slew of price-cuts. The SKU appears to be trapped between the 8-core 7800X3D, which remains the fastest desktop processor for gaming; and the 16-core 7950X3D, which is AMD's flagship. A Newegg listing at $408 with a $20 discount coupon see its effective retail price drop to as low as $389, which is just $20 more than the 7800X3D.

Would you pay $20 for four more cores? The choice is not so simple. While the 7900X3D is a 12-core processor, it features a dual-CCD design, with a 6+6 core arrangement between the two CCDs. Just like with the 7950X3D, only one of the two CCDs has the 64 MB 3D Vertical Cache, or 96 MB of L3 cache; while the other is a regular "Zen 4" CCD with 32 MB of on-die L3 cache. AMD's chipset drives use UEFI CPPC preferred-core flagging to guide gaming workloads to the CCD with the 3D V-cache. While we haven't had a chance to test the 7900X3D, this chip is tested by Tom's Hardware to still be faster than the Core i9-13900K at gaming.
Source: VideoCardz

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38 Comments on AMD Ryzen 9 7900X3D 12-core Processor Drops to $389

#26
Dr. Dro
mkppoThat's the thing, in the odd instance where a 14900K/KS beats a 7xxx X3D, it's slim margins. In the games where the X3D is faster, it ranges from a narrow victory to outright demolition.

I built a 7900 X3D rig for a mate the other week who primarily games at 1080p. Managed to snag new one in Canada for around 370 USD. At that price, it was pretty much a no brainer
On paper, the Intel processors are substantially faster, but this doesn't necessarily translate to better performance in every single application. We all know why, so I won't be going into detail yet again, but the truth is no matter the choice you make, there's something that will fit your needs great. IMO, these are the absolute best use cases if you are focusing on something:

Strictly gaming = 7800X3D
Productivity focus = 7900X3D or i7-14700K
Mixed workloads = Core i9 or 7950X3D
Raw single-thread power = Core i9
Raw multi-thread power = Core i9

I refer to "Core i9" mostly because I'd lump all 13900K+ in the same weight class
Posted on Reply
#27
mkppo
Dr. DroOn paper, the Intel processors are substantially faster, but this doesn't necessarily translate to better performance in every single application. We all know why, so I won't be going into detail yet again, but the truth is no matter the choice you make, there's something that will fit your needs great. IMO, these are the absolute best use cases if you are focusing on something:

Strictly gaming = 7800X3D
Productivity focus = 7900X3D or i7-14700K
Mixed workloads = Core i9 or 7950X3D
Raw single-thread power = Core i9
Raw multi-thread power = Core i9

I refer to "Core i9" mostly because I'd lump all 13900K+ in the same weight class
I should've specified that I was speaking strictly about gaming. Productivity wise it's different.
Posted on Reply
#28
Dr. Dro
mkppoI should've specified that I was speaking strictly about gaming. Productivity wise it's different.
Yeah, for just gaming the 7800X3D is all you need. Fits like a glove. :)
Posted on Reply
#29
Minus Infinity
CrackongTo be honest,
I think they should ditch the Async approach.
And just make the X3D CPU having 3D cache on both CCDs.
And tune the frequency to maximize power efficiency.

The Async problem is the main reason why I went for 7800X3D instead of 7950X3D
Zen 6 apparently finally fixes all these issues with the dual ccd. I will not get v-cache model until then. I don't just game, and X3D suffers too much in most (not all) productivity, but I do admire their efficiency. I'd get a 14700K or 7900X/7950X and power limit it to 125W-150W
Posted on Reply
#30
kapone32
Dr. DroYeah, for just gaming the 7800X3D is all you need. Fits like a glove. :)
Since that is your opinion, get one for yourself and leave us 7900X3D owners alone for preaching your opinion. I enjoy Computing on my 7900X3D. That includes Gaming.
Posted on Reply
#31
Dr. Dro
kapone32Since that is your opinion, get one for yourself and leave us 7900X3D owners alone for preaching your opinion. I enjoy Computing on my 7900X3D. That includes Gaming.
No one brought you up, you're just being overly defensive again. Your feelings don't change the facts. I've been gaming on HEDT/workstation parts for years. They can play games. They don't get the best frame rates and that is fine. But there are better options. And the 7800X3D is simply better for this use case.
Posted on Reply
#32
kapone32
Dr. DroNo one brought you up, you're just being overly defensive again. Your feelings don't change the facts. I've been gaming on HEDT/workstation parts for years. They can play games. They don't get the best frame rates and that is fine. But there are better options. And the 7800X3D is simply better for this use case.
In your opinion. The 7800X3D is not faster in every single Game than the 7900X3D. I have been testing mine with 6000Mhz RAM and the results are interesting so far.
Posted on Reply
#33
Minus Infinity
Dr. DroAnd the 7800X3D is simply better for this use case.
And the 7900X3D is better use for other case. Pick your priority. Heck I'd swap my 5800X for 7800X3D if it were just a drop in replacement even though I also do other stuff than game. Would still womp it in productivity, just not as much as say 7900X/X3D.
Posted on Reply
#34
Dr. Dro
kapone32In your opinion. The 7800X3D is not faster in every single Game than the 7900X3D. I have been testing mine with 6000Mhz RAM and the results are interesting so far.
It's not my opinion. You're in full denial about how the architecture works and harping on about to defend your purchasing decision in a vain attempt to justify yourself, and you weren't even grilled on this. You have a bad case of FOMO, we've already told you, not being the best doesn't mean it's automatically bad. Not even the 7950X3D which doesn't share your chip's limitations with the 6 cores per CCD can keep up with the 7800X3D in gaming. And then again, the i9 can't either. It's literally not a problem.

Posted on Reply
#35
Wirko
Minus InfinityZen 6 apparently finally fixes all these issues with the dual ccd.
How? A complete fix seems impossible as long as the CCD-IOD-CCD structure remains as is. An improvement, yes, that's probable and should be one of AMD's priority tasks.
Posted on Reply
#36
Tek-Check
WirkoHow? A complete fix seems impossible as long as the CCD-IOD-CCD structure remains as is. An improvement, yes, that's probable and should be one of AMD's priority tasks.
Two routes to decreasing latency:
- new Infinity Fabric - much faster, facilitates smoother communication
- 16-core CCD - solves issues, as one V-cache die can work with up to 16 cores on one die
Posted on Reply
#37
InVasMani
Dr. DroOn paper, the Intel processors are substantially faster, but this doesn't necessarily translate to better performance in every single application. We all know why, so I won't be going into detail yet again, but the truth is no matter the choice you make, there's something that will fit your needs great. IMO, these are the absolute best use cases if you are focusing on something:

Strictly gaming = 7800X3D
Productivity focus = 7900X3D or i7-14700K
Mixed workloads = Core i9 or 7950X3D
Raw single-thread power = Core i9
Raw multi-thread power = Core i9

I refer to "Core i9" mostly because I'd lump all 13900K+ in the same weight class
Pretty accurate though 14700K ST is as good as 13900K, but a bit worse MT than 13900K and 7950. The 7900X3D actually to me seems like one of the more practical options for gaming, productivity, and mixed workloads. The 14700K is pretty similar in that regard, but one leans a bit more heavily towards strictly gaming and the other mixed workloads, but the sweet spot on both is productivity focus.
Posted on Reply
#38
Wirko
Tek-CheckTwo routes to decreasing latency:
- new Infinity Fabric - much faster, facilitates smoother communication
- 16-core CCD - solves issues, as one V-cache die can work with up to 16 cores on one die
Another possibility is an additional IF link that connects both CCDs directly.
Posted on Reply
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