Hardware AMD Ryzen ThreadRipper 3990X 64 Cpu Cores 128 Threads !

eva2000 · Nov 9, 2019

AMD is on a roll lately with their AMD Ryzen Zen2 and AMD Rome Zen2 processors. Leaks are out of their new AMD Ryzen ThreadRipper 3990X with 64 cpu cores and 128 cpu threads AMD Ryzen Threadripper 3990X 64 Core & 128 Thread CPU Leaks Out !

Yesterday, AMD officially unveiled its 3rd Generation Ryzen Threadripper CPU lineup, featuring up to 32 cores and 64 threads on the new sTRX4 socket-based TRX40 platform. While the initial lineup is planned for launch on the 25th of November, there's one part that wasn't included or teased as planned and that part is the flagship Ryzen Threadripper 3990X.
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MSI posted their TRX40 Creator motherboard introductory video yesterday and in that video, MSI leaked out the 64 core and 128 thread chip. The video which has now been taken down by MSI showed the TRX40 Creator and a Threadripper CPU performing some intensive workloads but MSI decided to open the task manager for us too.

In the task manager, we can spot 8 vertical and 16 horizontal tiles. This rounds up to a total of 128 threads. For comparison, the Ryzen Threadripper 3970X features 64 threads and the TRX40 creator doesn't feature two sockets so it is definitely a single chip that features 128 threads. There is also no possibility that this could just be the 2nd Generation EPYC chip as those are designed around the server platform and there have been failed attempts before to booth EPYC chips on the HEDT X399 platform. So this is definitely a very early sample of what is supposed to be AMD's flagship Threadripper, the 3990X.
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AMD Ryzen ThreadRippers

To put this into perspective, highest core count Intel Desktop cpu right now is Intel Core i9 10980XE and Intel Core i9 9980XE with 18 cpu cores and 36 cpu threads which have respective RRP of $1000 and $1999.

And highest Intel Xeon core count is Intel Xeon 9282 Platinum Scalable cpu with 56 cpu cores and 112 cpu threads but has a price tag rumoured to be between $25K to $50K but it's apparently 84% faster than AMD EPYC 7742 64C/128T cpu in HPC AI Performance Benchmark Suite.

The Xeon Platinum is one of the elusive Cascade Lake-AP processors which feature two dies instead of a single monolithic one, stacking up to 56 cores and 112 threads. The chip has a base clock of 2.60 GHz and a boost clock of 3.80 GHz along with 77 MB of cache and a TDP of 400W. The Intel Cascade Lake-AP chips feature 12 memory channels compared to AMD's 8 memory channels per chip.

The AMD EPYC 7742 is based on a 7nm process node (vs Intel's 14nm+++) and features 64 cores / 128 threads. The chip has a base clock of 2.25 GHz and a boost clock of 3.4 GHz with 256 MB of L3 cache, 128 PCIe Gen 4 lanes and a TDP of 225W. The pricing plays a huge role too and here we see the EPYC 7742 with a price of $6950 US while the Xeon Platinum 9282 is suggested to have a price between $25K - $50K (via Anandtech).
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eva2000 · Feb 8, 2020

AMD ThreadRipper 3990X beast has arrived. Phoronix posted benchmarks at https://www.phoronix.com/scan.php?page=article&item=3990x-threadripper-linux&num=1

This initial round of Ryzen Threadripper 3990X was done on an Ubuntu 20.04 snapshot as of last week with the Linux 5.4 kernel and GCC 9.2.1. All of the systems, as always, were freshly re-tested on this forward-looking stack for how these HEDT CPUs should be performing with the upcoming Ubuntu 20.04 LTS release. Besides needing the MCE workaround (booting with mce=off until running the latest Linux 5.4 point releases or Linux 5.5), the experience has been good under Linux with the limited time for testing. Of course, with Linux 5.6 will also be better thermal reporting as well for AMD CPUs.

The other systems I benchmarked for this launch-day comparison included:

- AMD Ryzen 9 3950X
- AMD Ryzen Threadripper 2990WX
- AMD Ryzen Threadripper 3960X
- AMD Ryzen Threadripper 3970X
- AMD Ryzen Threadripper 3990X
- Intel Core i9 10980XE
- Intel Xeon Platinum 8253 (one of the most closely priced Xeons to the 3990X with it currently retailing for $3400 to $4000 USD)
- 2 x Intel Xeon Platinum 8280 (the most advanced non-AP Cascadelake combination for Xeon CPUs available right now but costing around $10k per CPU)
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pamamolf · Feb 8, 2020

Intel should start the production using 7nanometers asap and do a better architecture on their Cpu's...

AMD did a great job !!!

eva2000 · Feb 8, 2020

Unfortunately Intel can't even get past 14nm for 10nm right now and have production supply issues. So AMD is way ahead of the game at least for the next 12-24 months I suspect

We have AMD to thank for keeping Intel's high pricing at bay and for the high cpu core count race!

eva2000 · Feb 8, 2020

For Windows users, AMD ThreadRipper 3990X has varying performance depending on Windows version used though The 64 Core Threadripper 3990X CPU Review: In The Midst Of Chaos, AMD Seeks Opportunity

Unfortunately, not everything is just as straightforward as installing Windows 10 and going off on a 128 thread adventure. Most home users that have Windows typically have versions of Windows 10 Home or Windows 10 Pro, which are both fairly ubiquitous even among workstation users. The problem that these operating systems have rears its ugly head when we go above 64 threads. Now to be clear, Microsoft never expected home (or even most workstations) systems to go above this amount, and to a certain extent they are correct.

Whenever Windows experiences more than 64 threads in a system, it separates those threads into processor groups. The way this is done is very rudimentary: of the enumerated cores and threads, the first 64 go into the first group, the second 64 go into the next group, and so on.

With our 64 core processor, when simultaneous multithreading is enabled, we get a system with 128 threads. This is split into two groups, as shown above.

When the system is in this mode, it becomes very tricky for most software to operate properly. When a program is launched, it will be pushed into one of the processor groups based on load – if one group is busy, the program will be spawned in the other. When the program is running inside the group, unless it is processor group aware, then it can only access other threads in the same group. This means that if a multi-threaded program can use 128 threads, if it isn’t built with processor groups in mind, then it might only spawn with access to 64.

If this sounds somewhat familiar, then you may have heard of NUMA, or non-uniform memory architecture. This occurs when the CPU cores in the system might have different latencies to main memory, such as within a dual socket system: it can be quick to access the memory directly attached to its own core, but it can be a lot slower if a core needs to access memory attached to the other physical CPU. Processor groups is one way around this, to stop threads jumping from CPU to CPU. The only issue here is that despite having 128 threads on the 3990X, it’s all one CPU!
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Microsoft at retail sells Windows 10 Home, Windows 10 Pro, Windows 10 Pro for Workstations, and we can also find keys for Windows 10 Enterprise for sale. Each of these, aside from the usual feature limitations based on the market, also have limitations on processor counts and sockets. In the diagram above, we can see where it says Windows 10 Home is limited to 64 cores (threads), whereas Pro/Education versions go up to 128, and then Workstation/Enterprise to 256. There’s also Windows Server.

Now the thing is, Workstation and Enterprise are built with multiple processor groups in mind, whereas Pro is not. This has comes through scheduler adjustments, which aren’t immediately apparent without digging deeper into the finer elements of the design. We saw significant differences in performance.
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eva2000 · Feb 8, 2020

Folks over at Hothardware managed to overclock a AMD ThreadRipper 3990X all 128 cpu threads to 3.95Ghz https://hothardware.com/reviews/amd-ryzen-threadripper-3990x-cpu-review?page=7

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