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Thread: Building a 24 thread cruncher

  1. #21
    Join Date
    Jul 2003
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    Sydney, Australia
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    5,642
    Interesting Dirk. From my limited experience of having only ever purchased one Seasonic p/s it failed within 2 years of 24/7 usage. I vowed never to buy a Seasonic branded power supply again.

    My go to p/s is Corsair and I have had zero failures in 10+ years of 24/7 run-time in many many computers. What usually happens is that the CPU gets so old that it is too expensive from an electricity usage point of view to run a low core computer; better to replace with a new multiple core machine.

  2. #22
    Join Date
    Sep 2010
    Location
    Leiden, the Netherlands
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    4,372
    As Anandtech wrote in 2010: " In recent times they [Corsair] have used CWT, Seasonic and Flextronics as their PSU ODMs. A few weeks ago [plus ten years] Corsair presented their newest PSUs, the AX series. The goal is to provide performance, quality and high efficiency, this is apparently the best power supply Corsair can offer at the moment. Today we'll look at the AX750; is the 80Plus Gold certificate justified? And what other useful features does it provide? The AX750 and 850W models are based on a Seasonic design (X-400FL and/or X-760) with some modifications in the details."

    The RM series seems to be made by CWT
    The AX series seems to be made by Seasonic, as written above, the ODM for the AXi series is Flextronics though


  3. #23
    Join Date
    Sep 2010
    Location
    Leiden, the Netherlands
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    Great news for those into more threads: the two cheapest CPUs per thread offered are here now the 6-core/12-thread Ryzen 5 1600 and -surprise!- the 12-core/24 thread Ryzen Threadripper 1920X.
    Both are priced so that the price per thread falls below 9 Euro's on purchase, the Threadripper 1920X costing just over 200 Euro's, the Ryzen 5 1600 just over 100.

    Meanwhile the price for the 4-core/8-thread Ryzen 5 1500X (the one with the biggest L3 cache per core) has gone through the roof -to the moon even: 2200 Euro's...
    Nice response from AMD: the new budget model Ryzen 3 3100 has as much cores/threads/cache as the 1500X at a mere $99, and supports PCIe 4.0
    Last edited by Dirk Broer; 05-19-2020 at 12:21 PM.


  4. #24
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    Apr 2008
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  5. #25
    Join Date
    Sep 2010
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    Leiden, the Netherlands
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    If you go for an AM5 consumer system with 24 threads you also, as with the AM5 16 thread cruncher, have the choice between three CPUs but both prices and Tdp's are a bit more extreme though:

    Model Ryzen 9 7900 Ryzen 9 7900X Ryzen 9 7900X3D
    Normal Speed 3700 MHz 4700 MHz 4400 MHz
    Turbo Speed 5400 MHz 5600 MHz 5600 MHz
    L3 Cache 64 MB 64 MB 128 MB
    Tdp 65 Watt 170 Watt 120 Watt
    Price $ 450 $ 410 $ 600

    If all you want is to be able to run 24 threads, and do it as cheap as possible, you now buy a 65 Watt Tdp Ryzen 9 7900, put it in that same ASRock A620M Pro RS mobo (at least some passive VRM cooling),
    and stick in as much RAM as you can afford -it will take up to 128 GB DDR5.
    You don't need to bother with a GPU, as all three mentioned CPUs have the same IGP -a 128 shader core RDNA 2 Radeon, that runs between 400 and 2200 MHz.
    Running costs-wise I'd suggest a M.2 NVMe SSD of the PCI Express 3.0 x4 type, as they need far less Watts to read/write than the PCI Express 4.0 x4 variety -PCI Express 5.0 x4 won't run at all at those speeds in an A620 board.
    In case you are wondering how much this is supposed to help you cut costs: PCIe 4.0 x4 SSDs will draw as much as 7 Watt reading/writing, while the most cost-effective PCIe 3.0 x4 ones will do 0.07 Watt, doing the same.

    If it's performance you want, you'll take that Ryzen 9 7900X3D. That huge L3 cache will sure help at e.g. SRBase, albeit at the cost of a bigger power bill at the end of the year.
    You might be put off by the 170 Watt Tdp of the Ryzen 9 7900X -and rightly so- but in practice it will eat 'only' twice as much Watts from the wall as it X-less brother.

    And when money is no concern, you still might as well go all the way: buy that X670E ATX board -or even an EATX- for better cooling/overclocking options and enjoy all the benefits of PCI Express 5.0 x4!
    When you're spending so much money though, you might also want to consider a Ryzen 9 7950X or 7950X3D for a 32 thread cruncher (no 65 Watt Tdp 16-core Ryzen 9)....or wait for the next generation of Threadrippers -or go EPYC.
    Last edited by Dirk Broer; 05-25-2023 at 10:41 PM.


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