Question IBM: How does the Power 10 CPU arch. measure up to AMD's EPYC?

[80251]

How does the Power 10 architecture measure up to AMD's latest and greatest EPYC powered servers? Power 11 is IBM's newest CPU design, but it hasn't been announced yet.

Here's a redpaper on the Power 10 arch.:
https://www.redbooks.ibm.com/redpieces/abstracts/redp5675.html

A marketing release blurb from 2020:
https://newsroom.ibm.com/2020-08-17-IBM-Reveals-Next-Generation-IBM-POWER10-Processor

What is a "Open Memory Interface (OMI) connected differential DIMM (DDIMM) memory card?" It looks like OMI ends up using standard DDR4 slots with up to 32 such slots on their highest end servers. Whatever it is, OMI apparently supports: "the implementation of transparent memory encryption." Would this imply the OS doesn't need to know the memory is being encrypted?

Does the Power 10 use chiplets like AMD?

 

[kanewolf]

How does the Power 10 architecture measure up to AMD's latest and greatest EPYC powered servers? Power 11 is IBM's newest CPU design, but it hasn't been announced yet.

Here's a redpaper on the Power 10 arch.:
https://www.redbooks.ibm.com/redpieces/abstracts/redp5675.html

A marketing release blurb from 2020:
https://newsroom.ibm.com/2020-08-17-IBM-Reveals-Next-Generation-IBM-POWER10-Processor

What is a "Open Memory Interface (OMI) connected differential DIMM (DDIMM) memory card?" It looks like OMI ends up using standard DDR4 slots with up to 32 such slots on their highest end servers. Whatever it is, OMI apparently supports: "the implementation of transparent memory encryption." Would this imply the OS doesn't need to know the memory is being encrypted?

Does the Power 10 use chiplets like AMD?

Why the interest in PowerPC CPUs? They had almost no following when I was working on a project (mid 90s) that needed compute hardware. IBM would almost give them away, to get the support business and their maintenance costs were much greater than other vendors. We bough Itanium hardware over PowerPC ... What does that say? When Itanium became an abandoned platform we were able to move to Xeons.

 

[80251]

I have noticed that there are literally no standard benchmarks I could find (even specINT) for power 10. Is the performance that bad? IBM's marketing blurbs seem to indicate that Power 10 has some interesting tech features and I believe the amount of memory you can install in the top-end models is above what you can get with AMD or Intel based servers.

 

[kanewolf]

I have noticed that there are literally no standard benchmarks I could find (even specINT) for power 10. Is the performance that bad? IBM's marketing blurbs seem to indicate that Power 10 has some interesting tech features and I believe the amount of memory you can install in the top-end models is above what you can get with AMD or Intel based servers.

SGI (now HPE) could put 10s of TB of RAM in servers. But RAM is expensive, both in purchase cost and power. There are very few problems where a single BIG server is the answer. Problems are more likely solved by many smaller systems. Those "smaller" systems may have GPUs installed in them for enhancement.
And the X86 instruction set has won. ARM might eventually become equal, but not right now.