The AMD Threadripper 2990WX 32-Core and 2950X 16-Core Reviewby Dr. Ian Cutress on August 13, 2018 9:00 AM EST
If you live by the workstation, you die by the performance. When it comes to processing data, throughput is key: the more a user can do, the more projects are accomplished, and the more contracts can be completed. This means that workstation users are often compute bound, and like to throw resources at the problem, be it cores, memory, storage, or graphics acceleration. AMD’s latest foray into the mix is its second generation Threadripper product, also known as Threadripper 2, which breaks the old limit on cores and pricing: the 2990WX gives 32 cores and 64 threads for only $1799. There is also the 2950X, with 16 cores and 32 threads, for a new low of $899. We tested them both.
The AMD Threadripper 2990WX 32-Core and 2950X 16-Core Review
Ever since AMD launched its first generation Ryzen product, with eight cores up against Intel’s four cores in the mainstream, the discussion has been all about how many cores makes sense. The answer to this question is entirely workload dependent – how many users have a single workload in mind, or how many will use a variety of tools simultaneously. The workstation market encompasses a wide range of distinct power users, and despite the need for speed, there is rarely a one-size fits all solution.
AMD’s first generation of Threadripper, launched in 2017, introduced 16-core processors to the masses. Previously only available on the server platforms, these new parts were priced very competitively against 10-core offerings. AMD had ultimately used its server platform, with a few tweaks, to attack a competitive landscape where Halo products are seen as king-of-the-hill.
Intel’s own workstation products, previously named E5-2687W and relied on dual socket servers, were literally that – servers. After launching its latest high-end desktop platform, with up to 18 cores, Intel then subsequently launched the Xeon W-series, which replaced the E5-W parts from the previous generation. Again, these were up to 18-cores for ~$2500, but required special chipsets and motherboards.
Today AMD is officially putting out for sale its second generation of Threadripper. These new parts attack the market two-fold: firstly by using the improved Zen+ microarchitecture, giving for a 3% IPC increase in core performance, but also using 12nm, driving up frequencies and reducing power. The second attack on the market is core count: while AMD will be replacing the 12 and 16 core processors with new Zen+ models at higher frequencies, AMD also has 24 and 32 core processors for up to $1799. When comparing 32 cores at $1799 against 18 cores at $2500, it seems like a slam dunk, right?
How AMD Enabled 32 Cores
The first generation server processor line from AMD, called EPYC, uses four silicon dies of eight cores each to hit a the full 32 core product. These parts also had eight memory channels and 128 lanes of PCIe 3.0 to play with. In order to make the first generation Threadripper processors, AMD disabled two of those silicon dies, giving only 16 cores, four memory channels, and 60 lanes of PCIe. The end product was sold focused at consumers, not server customers.
For 32 cores, AMD takes the same 32-core EPYC silicon, but upgrades it to Zen+ on 12nm for a higher frequency and lower power. However, to make it socket compatible with the first generation, it is slightly neutered: we have to go back to four memory channels and 60 lanes of PCIe. AMD wants users to think of this as an upgraded first generation product, with more cores, rather than a cut enterprise part. The easy explanation is to do with product segmentation, a tactic both companies have used over time to offer a range of products.
As a result, one way of visioning the new second generation 32-core and 24-core products is bi-modal: half the chip has access to the full resources, similar to the first generation product, while the other half of the chip doubles the same compute resources but has additional memory and PCIe latency compared to the first half. For any user that is entirely compute bound, and not memory or PCIe bound, then AMD has the product for you.
In our review, we’ll see that this bi-modal performance difference can have a significant effect, both good and bad, and is very workload dependent.
AMD’s New Product Stack
The official announcement last week showed that AMD is coming to market with four second generation Threadripper processors. Two of these will directly replace the first generation product: the 16-core 2950X will replace the 16-core 1950X, and the 12-core 2920X will replace the 12-core 1920X. These two new processors will not be bi-modal as explained above, with only two of the four silicon die on the package being active (the 16-core will be a 8+0+8+0 configuration, the 12-core is a 6+0+6+0). Sitting at the bottom of the stack will be the first generation 8-core (4+0+4+0) 1900X that also offers quad-channel memory and 60 PCIe lanes.
|TR 1950X||$999||$899||TR 2950X|
|TR 1920X||$799||$649||TR 2920X|
The two new processors are the 32-core 2990WX and the 24-core 2970WX. They will enable four cores per complex (8+8+8+8) and three cores per complex (6+6+6+6) respectively, and are under the bi-modal nature of the memory and PCIe. The naming changes up to WX, presumably for ‘Workstation eXtreme’, but this puts the product in the same marketing line as the Radeon Pro WX family.
|TR 2990WX||32/64||3.0/4.2||64 MB||4x2933||60||250 W||$1799|
|TR 2970WX||24/48||3.0/4.2||64 MB||4x2933||60||250 W||$1299|
|TR 2950X||16/32||3.5/4.4||32 MB||4x2933||60||180 W||$899|
|TR 2920X||12/24||3.5/4.3||32 MB||4x2933||60||180 W||$649|
|Ryzen 7 2700X||8/16||3.7/4.3||16 MB||2x2933||16||105 W||$329|
The AMD Ryzen Threadripper 2990WX is the new halo product, with 32 cores and 64 threads coming in with a base frequency of 3.0 GHz and a top turbo frequency of 4.2 GHz. The idle frequency of this processor is 2.0 GHz, and when installed we saw 2.0 GHz on any core without work – it almost becomes the dominating frequency if the CPU isn’t constantly loaded. The 2990WX will be available from today and retail for $1799.
The other member of the WX series is the 2970WX, which disables one core per complex for a total of 24 cores. With similar frequencies as the 2990WX, and the same TDP, PCIe lanes, and memory support, this processor will be launched in October at the $1299 price point. With fewer cores being loaded, one might expect this processor to turbo more often than the bigger 32-core part.
For the X-series, the TR 2950X is our 16-core replacement, taking full advantage of the better frequencies that the new 12nm process can give: a base frequency of 3.5 GHz and a turbo of 4.4 GHz puts the previous generation processor to shame. In fact, the 2950X is set to be the joint highest clocked AMD Ryzen product. With that bump also comes a price drop: instead of $999 users can now get a 16-core processor for $899. The 2950X is due out at the end of the month, on August 31st.
Bringing up the rear is the 2920X, sitting in to replace the 1920X and with a similar trade-off to the other parts. As with the 2950X, the frequencies are nice and high compared to last year, with a base frequency of 3.5 GHz and a turbo of 4.3 GHz. This is all in a thermal design package of 180W. AMD told us that the TDP ratings for Threadripper 2, in general, were fairly conservative, so it will be interesting to see how they hold up. The 2920X is also out in October, going for $649 retail.
In This Review
- AMD’s New Product Stack [this page]
- Core to Core to Core: Design Trade Offs
- Precision Boost 2, Precision Boost Overdrive
- Feed Me: Infinity Fabric Requires 6x Power
- Test Setup and Comparison Points
- Our New Testing Suite for 2018 and 2019
- HEDT Benchmarks: System Tests
- HEDT Benchmarks: Rendering Tests
- HEDT Benchmarks: Office Tests
- HEDT Benchmarks: Encoding Tests
- HEDT Benchmarks: Web and Legacy Tests
- Overclocking: 4.0 GHz for 500W
- Thermal Comparisons: Remember to Remove the CPU Cooler Plastic!
- Going Up Against EPYC: Frequency vs Memory Channels
- Conclusions: Not All Cores Are Made Equal
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MrSpadge - Monday, August 13, 2018 - linkI don't think AVX512 is going to matter much anytime soon. However, The 8 memory channels of EPYC could matter a lot for HPC.
ElFenix - Monday, August 13, 2018 - linkYou guys need a 4k or maybe even 5k workload for transcoding - it's thread limited at 1080p so it becomes IPC and turbo limited. With x265 you can load up multiple 1080p handbrake instances on these high core count processors and they don't break a sweat.
ElFenix - Monday, August 13, 2018 - linkThat should be *1080p spawns limited numbers of threads*
T1beriu - Monday, August 13, 2018 - link>Europe is famed for its lack of air conditioning everywhere
UK is a lot colder generally in the summer compared to the rest of Europe. I wouldn't generalize the lack of AC for the rest of Europe. AC is pretty common in my country.
jospoortvliet - Saturday, August 18, 2018 - linkMissing everywhere here in Germany... though after this insanely hot summer i bet that that will begin to change...
powerincarnate - Monday, August 13, 2018 - linkI didn't see a lot of gaming benchmarks, which I guess I understand, since these are more workstation cpus. It would be good to have seen both though to get a better idea of the overall qualities of the cpu as a multipurpose care.
It seems from tomshardware benches that 7980xe, especially when overclocked, is best overall. AMD 2990wx obviously winning on the pure multi-threaded workstation stuff as long as it is not memory intensive.
It seems like the 2950x from both of these sites, is really the processor to get from the threadripper lineup.
it seems when gaming is taken to account, the best of both worlds is the 7900x
And for gaming, and when you factor price as well, the 8700k, 8086, and slightly behind, the 2700x are the cards to get.
Overall.... I'm a little disappointed in this release. Was much more impressed with the 2700x. It's likely since we didn't really get a true change in the manufacturing process or design of the chip, that the limitations of the 2990wx will probably be ironed out with Zen2 (this is Zen+ after all).
bill.rookard - Monday, August 13, 2018 - linkLooking at it myself, yeah - these really aren't gaming CPUs by any stretch of the imagination, thus the lack of gaming benchmarks is perfectly understandable to me. As for the results of the benchmark results? I'm thinking the 2950x is the sweet spot. Lower power, lower latency, more power for the cores vs interconnects, and a much higher clockspeed makes it IMHO the better choice unless you have those fringe workloads which requires a bunch-o-cores.
shendxx - Monday, August 13, 2018 - linkthis guy come from Toms that said 7900x is best for both world, lol, when the graph from toms show clearly even on gaming, 2950x is equal on Minimum FPS with 8700k and only lose 3 to 10 FPS On Average,
apoclypse - Monday, August 13, 2018 - linkI don't know. Gaming performance is the least thing I care about with this chip but that seems be all most tech press cares about, especially tech tubers. These chips are not for gaming. If anything these chips should be compared to Intel's Xeon line as it seems that is actually where AMD is aiming these at since they don't have a dedicated SKU for workstation chips like Intel. These are only marketed as HEDT chips because it gives AMD positive press, but if anything the ones who should be paying attention should be OEM high end workstation builders. In that regard Threadripper is more than compelling. It's higher clocked than Intel's Xeon chips, has more cores for less money, and still has all the pro level features that is needed for workstation level work.
I think AMD should lean into that a bit more in their marketing but that stuff isn't sexy and it doesn't grab attention like marketing it towards rich and stupid "gamers", and the technorati who eat that stuff up.
This is a workstation chip period, and should be treated, tested and benchmarked as such, imo.
Icehawk - Monday, August 13, 2018 - linkIf only the tier 1 vendors would offer TR workstations... I really wanted to purchase a few for work to use as VM hosts but my only real option is Xeon currently. The 32 core monster would likely make for a great VM host for mid-weight usage.