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Support for POWER9 22core?
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Topic: Support for POWER9 22core? (Read 10822 times)
tle
Sr. Member
Posts: 466
Karma: +53/-0
Support for POWER9 22core?
«
on:
February 15, 2020, 09:05:04 pm »
The official product page of blackbird stated that the motherboard support up to 8-core POWER9. Wondering if it is possible to use the POWER9 22core?
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MPC7500
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Re: Support for POWER9 22core?
«
Reply #1 on:
February 16, 2020, 05:56:04 am »
It's possible, but not at full speed. It's linked through the power consumption -> Mainboard VRMs
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ClassicHasClass
Sr. Member
Posts: 471
Karma: +37/-0
Talospace Earth Orbit
Re: Support for POWER9 22core?
«
Reply #2 on:
February 16, 2020, 07:04:33 pm »
I wouldn't. At best you'll have an expensive chip that won't achieve full throughput; at worst the power draw might blow something. You really need the T2 Lite or full T2 for that.
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Talospace
tle
Sr. Member
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Re: Support for POWER9 22core?
«
Reply #3 on:
February 19, 2020, 06:01:22 am »
Thanks for the response.
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MPC7500
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Re: Support for POWER9 22core?
«
Reply #4 on:
February 19, 2020, 08:58:12 am »
Also on Böackbird you have dual-channel memory, on TalosII quad-channel.
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surf
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Re: Support for POWER9 22core?
«
Reply #5 on:
February 24, 2020, 11:58:37 am »
It seems the limitation is power draw. The supported 8-core part is listed at 160w in the IBM datasheet, and there are a variety of core configurations that are 160w or less:
So it looks like a 22-core CPU (at a lower speed) should work, if you can find one. I think there are a variety of other CPU configurations floating around with part numbers that are not documented publicly. For example, I can't find what a 02AA878 is, but you can buy one:
https://www.newegg.com/p/1B4-002U-00CR1
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MPC7500
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Re: Support for POWER9 22core?
«
Reply #6 on:
February 24, 2020, 04:59:10 pm »
Do not forget that datasheet is from 2018, referring to order numbers. And a 02CY644 should work at full speed in a Blackbird, according to this chart.
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FlyingBlackbird
Full Member
Posts: 102
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Re: Support for POWER9 22core?
«
Reply #7 on:
February 27, 2020, 10:02:25 am »
Another aspect of getting non-supported CPUs to work with Blackbird is:
Does the PNOR (
https://wiki.raptorcs.com/wiki/PNOR
) contain the Self boot engine (SBE) code (
https://wiki.raptorcs.com/wiki/Self-Boot_Engine
) for all IBM Power 9 CPUs or only the supported ones?
Or asked in another way: Is the SBE code generic?
> The SBE firmware is open source.
If this is fully true it should be generic code...
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MPC7500
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Re: Support for POWER9 22core?
«
Reply #8 on:
February 27, 2020, 12:54:19 pm »
It's generic.
https://twitter.com/octaforge/status/1126986296591831045?s=20
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MPC7500
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Posts: 592
Karma: +41/-1
Re: Support for POWER9 22core?
«
Reply #9 on:
April 22, 2020, 11:12:31 am »
FYI, on the talos IRC is someone who is running a 18-core (190W) POWER9 on a Blackbird. And another one has overclocked a 8-core to 4.3GHz
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deepblue
Newbie
Posts: 13
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The only winning move is not to play...
Re: Support for POWER9 22core?
«
Reply #10 on:
April 25, 2020, 09:10:59 am »
I made a post of my experiences using the 18c Power9 CPU on a Blackbird.
https://forums.raptorcs.com/index.php/topic,99.0.html
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tle
Sr. Member
Posts: 466
Karma: +53/-0
Re: Support for POWER9 22core?
«
Reply #11 on:
May 09, 2020, 01:13:34 am »
The wiki page is continuing to get better
, if you are interested in learning more about Sforza IBM POWER9, check out the wikipage
https://wiki.raptorcs.com/wiki/Sforza
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Faithful Linux enthusiast
My Raptor Blackbird
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Support for POWER9 22core?