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posted by janrinok on Thursday June 07 2018, @06:53PM   Printer-friendly
from the begun-the-core-wars-have dept.

AMD released Threadripper CPUs in 2017, built on the same 14nm Zen architecture as Ryzen, but with up to 16 cores and 32 threads. Threadripper was widely believed to have pushed Intel to respond with the release of enthusiast-class Skylake-X chips with up to 18 cores. AMD also released Epyc-branded server chips with up to 32 cores.

This week at Computex 2018, Intel showed off a 28-core CPU intended for enthusiasts and high end desktop users. While the part was overclocked to 5 GHz, it required a one-horsepower water chiller to do so. The demonstration seemed to be timed to steal the thunder from AMD's own news.

Now, AMD has announced two Threadripper 2 CPUs: one with 24 cores, and another with 32 cores. They use the "12nm LP" GlobalFoundries process instead of "14nm", which could improve performance, but are currently clocked lower than previous Threadripper parts. The TDP has been pushed up to 250 W from the 180 W TDP of Threadripper 1950X. Although these new chips match the core counts of top Epyc CPUs, there are some differences:

At the AMD press event at Computex, it was revealed that these new processors would have up to 32 cores in total, mirroring the 32-core versions of EPYC. On EPYC, those processors have four active dies, with eight active cores on each die (four for each CCX). On EPYC however, there are eight memory channels, and AMD's X399 platform only has support for four channels. For the first generation this meant that each of the two active die would have two memory channels attached – in the second generation Threadripper this is still the case: the two now 'active' parts of the chip do not have direct memory access.

This also means that the number of PCIe lanes remains at 64 for Threadripper 2, rather than the 128 of Epyc.

Threadripper 1 had a "game mode" that disabled one of the two active dies, so it will be interesting to see if users of the new chips will be forced to disable even more cores in some scenarios.

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  • (Score: 3, Insightful) by bobthecimmerian on Thursday June 07 2018, @10:32PM (3 children)

    by bobthecimmerian (6834) on Thursday June 07 2018, @10:32PM (#690097)

    I wouldn't get it for gaming, I would guess that a $300-$500 CPU and, say, $1500 invested in the right GPU would outdo a $1000+ 32 core machine and $500 less spent on GPU.

    I rip all of my Blu Rays and DVDs to disk and then reencode them to H.265 (since that's the most bandwidth/disk space -efficient codec my streaming media devices can handle). So I could find a use for one of these machines for a few months. But as it is, right now I have an AMD FX-8320. It's a joke against the cutting edge, really, 4 cores, 8 threads, and the dedicated GPU is even older, form 2010. But I have an SSD drive and 32GB of RAM. I have my H.265 encoding running continuously in the background on 4 threads. The other 4 threads run Firefox, Chrome, Minecraft, a web server, and 3 VMs. I lock the screen and walk away, and my kids sit down to use Chrome and Mineraft. It never slows down.

    Now granted, if I was into more modern games it wouldn't work.

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  • (Score: 2) by Spamalope on Thursday June 07 2018, @11:41PM (2 children)

    by Spamalope (5233) on Thursday June 07 2018, @11:41PM (#690119) Homepage

    What software are you using to re-encode/convert to a single video file?
    I haven't done it in a very long time and the landscape has completely changed.

    • (Score: 2, Insightful) by Anonymous Coward on Friday June 08 2018, @04:17AM

      by Anonymous Coward on Friday June 08 2018, @04:17AM (#690194)

      Not the GP, but MakeMKV followed by HandBrake seems to be the choice lately.

    • (Score: 2) by bobthecimmerian on Friday June 08 2018, @11:35AM

      by bobthecimmerian (6834) on Friday June 08 2018, @11:35AM (#690273)

      I am on Linux, but everything I'm doing can be done on Windows. I use MakeMKV to rip films as-is and then ffmpeg to convert to H.265 video and AAC audio. AAC is the audio codec on DVDs and it's lower quality than the audio codecs on Blu Rays, but I can't hear any differences with my mediocre sound system. I've had problems with streaming video to PCs and Android television boxes using the Blu Ray audio codecs, that's why I do the conversion. I use .mkv files instead of .mp4 or similar because Blu Ray subtitles can't be stored in .mp4 files without some kind of conversion process.