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Last time I looked at Ampere it was way less power hub but then the competition. EPYC is over 250W at idle! Off the top of my head, the Ampere 128 core was 250

Last time I looked at Ampere it was way less power hub but then the competition. EPYC is over 250W at idle! Off the top of my head, the Ampere 128 core was 250W at max load. Big difference. Only issue I had was cache size, and you could only buy them from NewEgg. Oh… and the dual socket gigabyte board had the sockets too close together that I’d you put a big ass heat sink and fan, the outlet of one fan will go straight into the inlet of the other!

zamadatix 2y ago
I think you might be comparing your memories of Ampere's CPU power draw to either a full Epyc server's wall power draw or stated TDP. The 128 core EPYC 9754 in the chart linked above has a min of 10 W and a max draw of 397 W even though it outperforms the new 192 core variant AmpereOne A192-32X which had a min of 102 W and a max of 401 W. The min on the A192 does seem anonymously high though. That said, even the M128-30 has a min of 21 W or about twice that of the AmpereOne.
- alfiedotwtf 2y ago
  Hmmm. Weird because I was definitely out odd EPYC because of idle draw. Ok thanks, that’s back on the table now!!
  - nagisa 2y ago
    I wasn't been able to get my 2nd gen EPYC 7642 idle under 100W. Most of that power goes to the I/O die. The cores themselves manage their power very well. While I have all memory slots as well as a number of PCIe lanes occupied (more than 24 available from the consumer chips, but probably less than 48...,) I routinely think about side-grading to something else just to reduce the idle power consumption. I would be hard pressed to believe that another EPYC would be able to significantly reduce I/O die power consumption significantly, given that AMD hasn't really made many major changes to it over the generations.
    - alfiedotwtf 2y ago
      Thanks, and damn I guess… Maybe I should wait another 18 month cycle
    - alfiedotwtf 2y ago
      Sorry… another question - what would you recommend these days for a home machine in an office (i.e not a loud and hot rack but something for a quiet but hugely beefy workstation that’s not $9k per CPU)? Preferably more cores the better since my workload scales horizontally quite well (that’s why I looked at Ampere in the first place a while ago and almost did pull the trigger)

zamadatix 2y ago

I think you might be comparing your memories of Ampere's CPU power draw to either a full Epyc server's wall power draw or stated TDP. The 128 core EPYC 9754 in the chart linked above has a min of 10 W and a max draw of 397 W even though it outperforms the new 192 core variant AmpereOne A192-32X which had a min of 102 W and a max of 401 W. The min on the A192 does seem anonymously high though. That said, even the M128-30 has a min of 21 W or about twice that of the AmpereOne.

alfiedotwtf 2y ago
Hmmm. Weird because I was definitely out odd EPYC because of idle draw. Ok thanks, that’s back on the table now!!
- nagisa 2y ago
  I wasn't been able to get my 2nd gen EPYC 7642 idle under 100W. Most of that power goes to the I/O die. The cores themselves manage their power very well. While I have all memory slots as well as a number of PCIe lanes occupied (more than 24 available from the consumer chips, but probably less than 48...,) I routinely think about side-grading to something else just to reduce the idle power consumption. I would be hard pressed to believe that another EPYC would be able to significantly reduce I/O die power consumption significantly, given that AMD hasn't really made many major changes to it over the generations.
  - alfiedotwtf 2y ago
    Thanks, and damn I guess… Maybe I should wait another 18 month cycle
  - alfiedotwtf 2y ago
    Sorry… another question - what would you recommend these days for a home machine in an office (i.e not a loud and hot rack but something for a quiet but hugely beefy workstation that’s not $9k per CPU)? Preferably more cores the better since my workload scales horizontally quite well (that’s why I looked at Ampere in the first place a while ago and almost did pull the trigger)