The AMD Ryzen 7 5800X3D Review: 96 MB of L3 3D V-Cache Designed For Gamersby Gavin Bonshor on June 30, 2022 8:00 AM EST
- Posted in
- Ryzen 7 5800X3D
- 3D V-Cache
The level of competition in the desktop CPU market has rarely been as intensive as it has been over the last couple of years. When AMD brought its Ryzen processors to market, it forced Intel to reply, and both have consistently battled in multiple areas, including core count, IPC performance, frequency, and ultimate performance. The constant race to improve products, stay ahead of the competition, and meet customers' changing needs has also sent the two companies off of the beaten paths at times, developing even wilder technologies in search of that competitive edge.
In the case of AMD, one such development effort has culminated with 3D V-Cache packaging technology, which stacks a layer of L3 cache on top of the existing CCD's L3 cache. Owing to the fact that while additional cache is beneficial to performance, large quantities of SRAM are, well, large, AMD has been working on how to place more L3 cache on a CPU chiplet without blowing out the die size altogether. The end result of that has been the stacked V-Cache technology, which allows the additional cache to be separately fabbed and then carefully placed on top of a chip to be used as part of a processor.
For the consumer market, AMD's first V-Cache equipped product is the Ryzen 7 5800X3D. Pitched as the fastest gaming processor on the market today, AMD's unique chip offers eight cores/sixteen threads of processing power, and a whopping 96 MB of L3 cache onboard. Essentially building on top of the already established Ryzen 7 5800X processor, the aim from AMD is that the additional L3 cache on the 5800X3D will take gaming performance to the next level – all for around $100 more than the 5800X.
With AMD's new gaming chip in hand, we've put the Ryzen 7 5800X3D through CPU suite and gaming tests to see if it is as good as AMD claims it is.
AMD Ryzen 7 58003XD: Now With 3D V-Cache
Previously announced at CES 2022, the Ryzen 7 58003XD is probably the most interesting of all of its Ryzen based chips to launch since Zen debuted in 2017. The reason is that the Ryzen 7 5800X3D uses AMD's own 3D V-Cache packaging technology that essentially plants a 64 MB layer of L3 cache on top of the existing 32 MB of L3 cache that the Ryzen 7 5800X has.
To outline the framework of the 3D V-Cache, AMD is using a direct copper-to-copper bonding process, with the additional layer of 64 MB L3 cache stacked on top of the existing 32 MB L3 cache on the die. AMD claims this increases gaming performance by 15% on average when comparing the Ryzen 9 5900X (12c/16t) to a 12-core 3D chiplet prototype chip. Whether AMD's claim is based solely on the 12-core design or if this level of performance increase is linear when using fewer cores is hard to determine.
It is clear that 3D V-Cache and its innovative bonding technique, which fuses additional L3 cache on top of existing L3 cache, is an interesting way to deliver solid performance gains, given how crucial L3 cache levels can be for specific game titles. AMD also claims that the large levels of L3 cache improve performance in multi-threaded workloads such as video encoding.
The design of the Vertical (V) Cache is based on the same TSMC 7 nm manufacturing process as the CCD, with a thinning process that is part of TSMC's technologies designed to negate any thermal complications that would arise. Bridging the gap between the 32 MB of on-die L3 cache and the vertically stacked 64 MB of L3 Cache is a base of structural silicon, with the direct copper to copper bonding and connected by silicon VIAs and TSVs.
Looking at where it positions itself in the stack, the Ryzen 7 5800X3D is unequivocally the same price as the Ryzen 9 5900X, which benefits from four additional Zen 3 cores, as well as eight additional threads. The Ryzen 7 5800X3D does have a lower base frequency than the Ryzen 7 5800X by 400 MHz, with a 200 MHz lower turbo frequency. This will likely be a power limiting factor as the additional L3 cache will generate power.
|AMD Ryzen 5000 Series Processors for Desktop (>$200)
Zen 3 Microarchitecture (Non-Pro, 65W+)
|Ryzen 9 5950X||16||32||3400||4900||64 MB||-||4.0||105 W||$590|
|Ryzen 9 5900X||12||24||3700||4800||64 MB||-||4.0||105 W||$450|
|Ryzen 9 5900||12||24||3000||4700||64 MB||-||4.0||65 W||OEM|
|Ryzen 7 5800X3D||8||16||3400||4500||96 MB||-||4.0||105 W||$449|
|Ryzen 7 5800X||8||16||3800||4700||32 MB||-||4.0||105 W||$350|
|Ryzen 7 5800||8||16||3400||4600||32 MB||-||4.0||65 W||OEM|
|Ryzen 7 5700X||8||16||3400||4600||32 MB||-||4.0||65 W||$299|
|Ryzen 5 5600X||6||12||3700||4600||32 MB||-||4.0||65 W||$230|
As the 3D V-Cache is primarily designed to improve performance in game titles, the new chip isn't too far from the Ryzen 7 5800X in regards to raw compute throughput. There will be a slight advantage to the Ryzen 7 5800X and Ryzen 9 5900X in this area with higher core frequencies on both models. Still, as I've previously mentioned, the real bread and butter will be in gaming performance or at least games that will benefit and utilize the extra levels of L3 cache.
AMD Ryzen 7 5800X3D: Overclocking Support for Memory, But not the Core
Although the Ryzen 7 5800X3D supports memory overclocking and allows users to overclock the Infinity Fabric interconnect to supplement this, AMD has disabled core overclocking, which makes it incompatible with AMD's Precision Boost Overclocking feature. This has disappointed a lot of users, but it is a trade-off associated with the 3D V-Cache.
Specifically, the limitations in overclocking come down to voltage limitations ( 1.35 V VCore) through the use of its packaging technology. The dense V-cache dies, it would seem, can't handle extra juice as well as the L3 cache already built into the Zen 3 chiplets.
As a result, in lieu of CPU overclocking, the biggest thing a user can do to influence higher performance with the Ryzen 7 5800X3D is to use faster DDR4 memory with lower latencies, such as a good DDR4-3600 kit. These settings are also the known sweet spot for AMD's Infinity Fabric Interconnect as set out by AMD.
Looking at the state of the desktop processor market as it is now, and by the end of the year, things look promising for users with plenty of choices available. The primary battle right now in gaming performance comes down to AMD's Ryzen 7 5800X3D ($450) and Intel's 12th Gen Core series options, with the Core i9-12900K leading the charge for team Intel.
Perhaps the most interesting debate is when it comes to buying a new processor, as both the current generational offerings from both AMD and Intel offer superb gaming performance on the whole. It's tough to select a mainstream desktop processor that doesn't work well with most graphics cards, and outside pairing up a flagship chip with a flagship video card, it will most likely come down to performance in compute, productivity, and content creation applications. We know that AMD is releasing its latest Zen 4 core later on this year, and we have come to expect advancements and progression in IPC performance.
The AMD Ryzen 7 5800X3D with its 3D V-Cache is new and exciting, and specifically for gaming performance, the battle for the title of 'fastest gaming processor' is ever-changing. Based on the existing AM4 platform, AMD has given users a leading-edge design in a familiar platform, but the biggest challenge will be in making true of AMD's claims, and that's what we aim to do in this review.
Finally, regardless of how the 5800X3D does today, AMD's stacked V-cache technology is not a one-and-done offering. AMD recently announced there will be a Zen 4 variation with 3D V-Cache at some point during the cycle, as well as announcing the same for Zen 5, which is expected in 2024.
For our testing, we are using the following:
|Ryzen Test System (DDR4)|
|CPU||Ryzen 7 5800X3D ($450)
8 Cores, 16 Threads
105W TDP, 3.4 GHz Base, 4.5 GHz Turbo
|Motherboard||ASUS ROG Crosshair VIII Extreme (X570)|
2x32 GB DDR4-3200
|Cooling||MSI Coreliquid 360mm AIO|
|Storage||Crucial MX300 1TB|
|Power Supply||Corsair HX850|
|GPUs||NVIDIA RTX 2080 Ti, Driver 496.49|
|Operating Systems||Windows 11 Up to Date|
For comparison, all other chips were run as tests listed in our benchmark database, Bench, on Windows 10 and 11 (for the more recent processors).
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iphonebestgamephone - Thursday, June 30, 2022 - linkThey probably found it not as important as this one.
Kangal - Friday, July 1, 2022 - linkThere's no Andrei... so maybe you're right.
iphonebestgamephone - Friday, July 1, 2022 - linkAndrei be busy with the nuvia cores.
Silver5urfer - Thursday, June 30, 2022 - linkForget this chip because at this point anyone is better off with a 5900X as it's far superior in MT plus higher cores. This thing is locked for tuning, and the X3D is causing the clock speed deficit on top. The only advantage is low voltage for PBO as it runs at 1.3v only vs the usual Zen 3 at 1.4v.
The major issue is AMD BIOS and Firmware. It's not upto the mark the 18.104.22.168 is finally out it fixes a lot of things BUT the core problems of USB are not fixed. Anyone who has Ryzen 2000 should get a 5900X once Ryzen 7000 launches, not only you can get more cores at cheap plus also a beast at MT which can be used at any task. Not some gaming only junk. This thing struggles on RPCS3 emulation too. You need ST performance and high clocks for such and major workloads the L3 cache is great but the limitations are not worth spending over $450 for this, you can get a 10850K for $320 if you looked for deals, that's a 10C20T CPU which will destroy this processor in all workloads and if you add OC it will be as fast as a 12th gen, check Tomshardware CPU ranking list for gaming here and see for yourself how 10th gen fares better you don't have to deal with BS BIOS issues, USB problems etc
For those who want to buy new, wait for AMD Ryzen 7000 or Z790, Z690 has ILM problems you must avoid it. Ryzen is buggy platform. You are left with Intel 10th gen, it's best but the PCIe3.0 is it's downside.
nandnandnand - Thursday, June 30, 2022 - linkThe fact that it can trade blows with the 12900K/S often in gaming makes the 5800X3D impossible to so easily dismiss for current AM4 owners. You could get a cheaper 5900X, but if you don't need the extra cores, you won't notice the difference.
It would be better to get it on sale for far less than $450, but the supply might be kept low to make that difficult. AMD gets more $$$ from sending these cache chiplets to Epyc Milan-X customers.
Going forward, I think AMD should offer the 16-core 7950X only with V-Cache, delaying it after the other models, and 7800X with and without V-Cache.
Khanan - Thursday, June 30, 2022 - linkThat won’t happen as again 7950X is a mixed cpu not entirely for gamers. So the likeliness is high only the 8 core will get 3DVCache again.
nandnandnand - Thursday, June 30, 2022 - linkI don't think they will launch it on only the 8-core 2 generations in a row. 5800X3D is an experiment, soon it's time to make it normal. 7950X is the obvious choice since it uses good chiplets and it's a low-volume halo product.
It would also be nice to see a 6-core with a bad yield partial cache chip on top, but that's probably a pipe dream.
Khanan - Friday, July 1, 2022 - link3DVC mostly scales for gaming so again it makes no sense to give it a production CPU. And lol no 7950X is no low volume product, if sells in the millions. It’s a content creation CPU, also who said 5800X3D is a experiment? Lol so many nonsensical comments here
Silver5urfer - Friday, July 1, 2022 - link5800X3D is an experimental SKU, the fact that it cannot handle tuning is first, second it's not high saturation since Zen 3 is already at peak which means it's low volume. Third, this is a reject EPYC chiplet which is why AMD segregated it to a single SKU vs whole Stack of X3D refresh on Zen 3. Plus this thing is just AMD looking at how things work IRL when they use their 3D Cache for Consumer processors to understand how the CPU makes market react.
It is not going to get any new consumers for AMD, AM4 is a dead end socket. Using this SKU priced at $450 to buy is worse and I certainly would not given the QC of AMD in Firmware.
Anything I disagree = nonsense I guess lol.
Kangal - Friday, July 1, 2022 - linkIt would make more sense if AMD did one more "experimental" release with V/3D-Cache on their 8-core Zen4 processor (r7-7800X3D). But then I think they should offer it throughout the product stack, utilising the "X" moniker, and making their Planar/2D-Cache on their regular options:
- r9-8950 vs 8950X
- r9-8900 vs 8900X
- r7-8800 vs 8800X
- r5-8600 vs 8600X