I can’t speak to any putative baby z17 but I can say this… 1. It’s certain z16 configurations that draw more power than their z15 counterparts, but only certain ones. Typically the lower characterized core per chip count might show this – according to a graph I have (and use in my Drawers, Of Course presentation).
2. I expect z17 configurations to typically be lower power like for like, compared to z16. 3. With new fields in CPU Control Section of SMF 70-1 for z17 you can see the power consumption by LPAR (and above LPAR) by time of day. I added these to the appendix on Sustainability in the z17 Technical Guide. Also in an upcoming blog post where I have “Part 0” 😊 thoughts on them. Cheers, Martin From: IBM Mainframe Discussion List <[email protected]> on behalf of Jim Elliott <[email protected]> Date: Thursday, 17 April 2025 at 13:19 To: [email protected] <[email protected]> Subject: [EXTERNAL] Re: z17 The smallest z16 (3932) you can buy has 4 processor chips in 2 dual chip modules. The Max5 has 5 configurable cores while the Max16 has 16, but physically they are the same. Even if you only configure 1 core, all the cache on the other cores can be used as cache so are on. If you compare a z15 and a z16 in the Power and Weight Estimation Tool on ResourceLink you will see the z16 draws more power, and the z17 will I expect be more. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN Unless otherwise stated above: IBM United Kingdom Limited Registered in England and Wales with number 741598 Registered office: Building C, IBM Hursley Office, Hursley Park Road, Winchester, Hampshire SO21 2JN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
