Instead of speculations it's better to check it.
Configuration: 1 CP, 1 CPC drawer, 1 I/O drawer with 1 FICON card and 1
OSA card, PDU. Minimum memory (512GB).
z17: 3041 W
z16: 3204 W
z15: 2693 W
Now 30 CPs - still single CPC drawer, rest as above.
z17: 3041 W
z16: 3410 W
z15: 2962 W
Hint: all the processors do consume power, it doesn't mater wether
enabled (bought) or not.
Now max # of CPs, max memory - different values (190-200-208), same I/O,
etc.
z17: 13204 W
z16: 14490 W
z15: 13654 W
By playing with the number of cards, drawers, etc. you can find out the
wattage of every component.
Disclaimers:
1. Power consumption also depends on "secondary" factors like increased
cooling, ambient temperature, etc.
2. It is only estimator.
My opinion: It is quite obvious, the wattage per MIPS, per I/O, per
other computing entity is smaller. Even wattage per real configuration
is slightly smaller. If fact I don't care, because in most cases I see
greenwashing and hypocrisy, but I see the difference.
BTW: I remember upgrade from z9 to z10. z10 had green strip on cabinet
doors and the sales pitch was it is due to ESG. Howeve in my
configuration there was no change in MIPS or I/O, but there was a change
in wattage: 4000 to 6000 roughly. So, new machine was green and consumed
50% more power. However roughly similar configuration in z17 (much more
CPU, faster FICON) would consume approx 4000 W again.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 18.04.2025 o 13:28, Scott Chapman pisze:
I presume that's half as many FICON cards with a move from 2 port to 4 port
cards and those cards should be more power efficient as the DPU takes over some
processing that was previously in ASICs on the cards.
Scott Chapman
On Thu, 17 Apr 2025 14:48:16 -0700, Tom Brennan<[email protected]>
wrote:
That's different than what I've found so far. I went to ResourceLink
just now and entered basically the same data for a z15, z16, and z17 as:
Single CEC drawer
20 Processors active
2048 GB
5 I/O drawers
40 FICON ports
10 OSA 10G fiber
10 OSA 1G fiber
10 OSA 1G copper
Results, assuming I added correctly:
z15 8114 W
z16 6635 W
z17 5928 W
https://www.mildredbrennan.com/mvs/z15_power.png
https://www.mildredbrennan.com/mvs/z16_power.png
https://www.mildredbrennan.com/mvs/z17_power.png
On 4/17/2025 5:19 AM, Jim Elliott wrote:
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.
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