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Thread: Crunching farm considerations

  1. #1
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    Crunching farm considerations

    TDP be what is may be, but while comparing TDP values between Intel and AMD CPUs can't reliably be done due to difference in definition used, TDP values between AMD cpu's are at least comparable.

    What does AMD offer at the moment?
    My 'set and forget' x86-architecture section presently runs on the AM1 platform, three AMD Athlon 5350 quad-core APUs (SOCs really) with a TDP of 25 Watt, so 6.25 Watt TDP per core/thread,
    and one Gemini Lake platform Intel J5005 quad-core SOC with a TDP of 10 Watt, so 2.5 Watt TDP per core/thread. All four are iTX systems.
    Must they be replaced with something newer? If yes, by what?

    CPU/APU TDP in Watt Cores Threads TDP/Core TDP/Thread
    Bristol Ridge
    AMD A6-9500
    65
    2
    2
    32.5
    32.5
    AMD A6-9500E
    35
    2
    2
    17.5
    17.5
    AMD A8-9600
    65
    4
    4
    16.25
    16.25
    AMD A8-9600E
    35
    4
    4
    8.75
    8.75
    AMD A10-9700
    65
    4
    4
    16.25
    16.25
    AMD A10-9700E
    35
    4
    4
    8.75
    8.75
    AMD A12-9800
    65
    4
    4
    16.25
    16.25
    AMD A12-9800E
    35
    4
    4
    8.75
    8.75
    Raven Ridge
    Athlon 200GE
    35
    2
    4
    17.5
    8.75
    Ryzen 3 2200G
    45-65
    4
    4
    11.25-16.25
    11.25-16.25
    Ryzen 3 2200GE
    35
    4
    4
    8.75
    8.75
    Ryzen 5 2400G
    45-65
    4
    8
    11.25-16.25
    5.625-8.125
    Ryzen 5 2400GE
    35
    4
    8
    8.75
    4.375
    Picasso
    Ryzen 3 3300G
    65
    6
    12
    10.83
    5.416
    Ryzen 5 3600G
    95
    8
    16
    11.875
    5.937

    At the moment the Ryzen 3 2400GE looks like an ideal candidate to replace my aging Athlon 5350's, but I have yet to encounter one in the wild.
    The 'set and forget' section only needs a SSD and RAM sticks, so a board with an A320 chipset should be enough. iTX A320 boards do exist (Asrock),
    but here too I have yet to encounter one in the wild. The local agent (Asrock Europe) does not stock them, AFAIK.
    A MSI B450 iTX board might be a good alternative though -and a well-ventilated iTX case to provide the much needed VRM cooling when you decide
    to let go of the -top-down blowing- stock cooler, in favour of a huge cooling tower. Fortunately I have such a case.
    To be continued...
    Last edited by Dirk Broer; 01-24-2020 at 01:06 PM.


  2. #2
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    My 2nd tier of x86 machine are APUs too: 65 Watt TDP FM1 and FM2 quad-core/quad thread APUs in μATX boards.
    These can be replaced with the Ryzen 5 2400Gs (or, if I hold my breath a little longer: the Ryzen 3 3300G) and B450 chipset μATX boards look ideal for them for now.

    The third x86 tier are also APUs: 100 Watt TDP FM1 and FM2 quad-core/quad thread APUs in ATX boards.
    These too can be replaced with the Ryzen 5 2400Gs (or, if I hold my breath a little longer: the Ryzen 5 3600G). B450 μATX boards look ideal for those now.

    The final x86 tier is at present my Intel i7-3770. This should be replaced at least with a Ryzen 7 1700, and a Ryzen 7 2700 would be better still.
    Holding ones breath in this case is waiting for the Ryzen 7 3700 (12-core/24-thread). I am presently thinking of X470 ATX boards for this tier.

    CPU/APU TDP in Watt Cores Threads TDP/Core TDP/Thread
    Bristol Ridge
    AMD AthlonX4
    65
    4
    4
    16.250
    16.250
    Summit Ridge
    Ryzen 3 1200
    65
    4
    4
    16.250
    16.250
    Ryzen 3 1300X
    65
    4
    4
    16.250
    16.250
    Ryzen 5 1400
    65
    4
    8
    16.250
    8.125
    Ryzen 5 1500X
    65
    4
    8
    16.250
    8.125
    Ryzen 5 1600
    65
    6
    12
    10.8333
    5.4166
    Ryzen 5 1600X
    95
    6
    12
    15.8333
    7.9166
    Ryzen 7 1700
    65
    8
    16
    8.1250
    4.0625
    Ryzen 7 1700X
    95
    8
    16
    11.8750
    5.9375
    Ryzen 7 1800X
    95
    8
    16
    11.8750
    5.9375
    Pinnacle Ridge
    Ryzen 3 2300X
    65
    4
    4
    16.25000
    16.25000
    Ryzen 5 2500X
    65
    4
    8
    16.25000
    8.12500
    Ryzen 5 2600E
    45
    6
    12
    7.50000
    3.75000
    Ryzen 5 2600
    65
    6
    12
    10.83333
    5.41666
    Ryzen 5 2600X
    95
    6
    12
    15.83333
    7.91666
    Ryzen 7 2700E
    45
    8
    16
    5.62500
    2.81250
    Ryzen 7 2700
    65
    8
    16
    8.12500
    4.06250
    Ryzen 7 2700X
    105
    8
    16
    13.12500
    6.56250
    Matisse
    Ryzen 3 3300
    50
    6
    12
    8.33333
    4.16666
    Ryzen 3 3300X
    65
    6
    12
    10.83333
    5.41666
    Ryzen 5 3600
    65
    8
    16
    8.12500
    4.06250
    Ryzen 5 3600X
    95
    8
    16
    11.87500
    5.93700
    Ryzen 7 3700
    95
    12
    24
    7.91600
    3.95800
    Ryzen 7 3700X
    105
    12
    24
    8.75000
    4.37500
    Ryzen 9 3800X
    125
    16
    32
    7.81250
    3.90625
    Ryzen 9 3850X
    135
    16
    32
    8.43750
    4.21875

    Performance comes at a price, we all know that. Low TDP's comes with lesser performance though, in general.
    But be sure that the Ryzen 9 3800X packs enough performance. The Pinnacle Ridge E models might be lacking somewhat though.
    Last edited by Dirk Broer; 02-17-2019 at 11:15 PM.


  3. #3
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    Quote Originally Posted by Dirk Broer View Post
    At the moment the Ryzen 3 2400GE looks like an ideal candidate to replace my aging Athlon 3850's, but I have yet to encounter one in the wild.
    The 'set and forget' section only needs a SSD and RAM sticks, so a board with an A320 chipset should be enough. iTX A320 boards do exist (Asrock),
    but here too I have yet to encounter one in the wild.
    you can come close if you set a 2400G to run in 45 watt tdp mode. looks like on ebay, there are full GE system builds for $500-800.

    also, for the price premium of ITX boards (especially if you're trying to spend minimally on the setup), IMO i think uATX is the better deal

  4. #4
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    Quote Originally Posted by plonk420 View Post
    you can come close if you set a 2400G to run in 45 watt tdp mode. looks like on ebay, there are full GE system builds for $500-800.

    also, for the price premium of ITX boards (especially if you're trying to spend minimally on the setup), IMO i think uATX is the better deal
    The main problem with μATX boards for me is that they do not fit in my SFF iTX-only casings.

    The latter have -with me- the advantage of an inbuilt 90 Watt PSU, which lowers the power usage.
    During the height of the AM1 days AM1 iTX systems costed next to nothing...
    Last edited by Dirk Broer; 01-23-2019 at 01:33 AM.


  5. #5
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    ah. didn't know you already had them

    maybe this in the near future?? https://www.anandtech.com/show/13885...x-comes-to-amd

  6. #6
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    And what about Ryzen Threadripper in a crunching farm?

    The 32-core/64-thread Threadripper 2990WX is -for me- the only variant that has a good tdp/thread RATIO, due to the much higher tdp of this line of CPUs (180 watt for the eight-core Threadripper 1900X is a bit steep).
    If you do have the money for it: Go! More PCIe lanes, room for 128 GB quad-channel RAM, etc.


  7. #7
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    Quote Originally Posted by plonk420 View Post
    ah. didn't know you already had them

    maybe this in the near future?? https://www.anandtech.com/show/13885...x-comes-to-amd
    I am thinking of modding old PC's (e.g. IBM PS/2's or Compaq's) to 'sleepers' with thin iTX mobo's.


  8. #8
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    I am currently in the process of moving up one floor (back to the attic) and while disconnecting PC's I will replace my FM1-based machines with AM4 ones.
    Tier 2 will from now on be with 35 Watt TDP machines (instead of 65 Watt ones), tier 3 goes back from 100 Watt to 65 Watt TDP.
    Hopefully this will lower my powerbill, while the number of active threads actually increases.


  9. #9
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    The Threadripper 3990X from an unexpected perspective: cheapest operational costs per thread:

    And the 65 Watt tdp 12-core Ryzen 9 3900 (so without 'X') has the most L3 cache per core/thread, while staying close to the lowest tdp levels per core/thread. The hypothetical 48-core Threadripper 3980X would be of equal level. The 'X' model of course has the same L3 values.
    Note that the Intel SOCs and CPUs all have IGPs here, just as the Athlons and the Ryzen 5's (that of the Pentium G2120T isn't useable in BOINC though).


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