Question Alder Lake - Official Thread

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Markfw

Moderator Emeritus, Elite Member
May 16, 2002
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That's not really the point of the discussion, but yes, if both take the same time then the average power measurement relationship will be mirrored to the total energy consumed.
Not to be a jerk, but I disagree. Lets say a Haswell era CPU has twice the cores, but accomplishes this in the same time. I am sure the power consumption would be much higher.
 
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Abwx

Lifer
Apr 2, 2011
11,172
3,868
136
7-Zip is clearly not the tool to use to measure IPC.

AT said the contrary, at the time they used 7 ZIP as representative of Integer perf, FTR Zen 3 improved more INT than FP relatively to Zen 2.

The numbers above are correlated by Computerbase 7 ZIP test.

 

Hitman928

Diamond Member
Apr 15, 2012
5,622
8,847
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Not to be a jerk, but I disagree. Lets say a Haswell era CPU has twice the cores, but accomplishes this in the same time. I am sure the power consumption would be much higher.

In context of the post, it doesn't matter. If CPU A finishes in 100 sec and CPU B finishes in 100 sec, then the relative amount of energy used to complete the task between the CPUs will be directly related to their average power consumption (watts) during the run. You are essentially making time a constant in this scenario so you can compare watts directly.

e.g.

CPU A uses 25W average and completes the task in 100 sec.
CPU B uses 50W average and completes the task in 100 sec.
CPU C uses 100W average and completes the task in 100 sec.

CPU A used 25W * 100s = 2500J
CPU B used 50W * 100s = 5000J
CPU C used 100W * 100s = 10000J

CPU B used twice as much energy to complete the task as CPU A and CPU C used four times as much as CPU A, it doesn't matter what CPU A/B/C are.

@insertcarehere 's point was that the Joules versus Watts discussion doesn't matter because they both completed the task in the same time so we can just look at Watts, which is true, as with a little bit of linear algebra we can eliminate the 100s altogether. But, that wasn't really the point of the discussion to begin with. The point was that the 5600x clearly had PBO enabled and makes any process/architecture efficiency comparison a non-starter.
 

dullard

Elite Member
May 21, 2001
25,214
3,632
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7-Zip decompression hm, why is it slower vs i5 11400F/12mb L3 Cache.

How can be slower, if i5 12400F has higher IPC+bigger L3 Cache 18mb.
Are we to assume Alder Lake is better in any scenario that you don't bring up?

Seriously though, Rocket Lake 11400F has a PL2 value of 154 W. Alder Lake 12400 has a PL2 value of 117 W.
This is shown in the hardwareluxx.de benchmark you linked with the 11400F using 64% more package power than the 12400. So, while, yes there are some cases where the 11400F has higher performance, this comes at a much higher power usage.
 

JoeRambo

Golden Member
Jun 13, 2013
1,814
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Tests like 7-zip basically run at the speed of memory. And it's easy to 'load" memory with background work. I would not dare to blame reviewer, something simple as antivirus scan or whatever Windows decided to run could have impacted the results.

7z is very likely not hitting any power limits, not in my testing, it is sipping power with truckload of LLC misses.


I am also in the UK now and these listings took literally two seconds to find, and it doesn't include some other motherboard OEMs who haven't announced B660/H670 series boards (CES being still ongoing).

And there is also a factor of deals and rebates. For example people who bought MSI Z690-A PRO in early days of ADL, not only got one of the best motherboards for overclocking DDR4 for 190ish euros, but they could also with some minor effort on MSI rewards site get 34Eur steam coupon + Deathloop game.
 
Last edited:

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
136
If you want to get an accurate power consumption measurement , use a Kill a Watt at the wall socket to measure Watt hours (Wh) of the entire system when performing the same job.

For example, to finish the same render on Blender or play the same game for the same time.

Measuring only the V12 it doesnt say the complete story, unless you want to be more technical and see specific hardware consumption. But at the end, for the end user the entire system power consumption is what you should check and not the CPU or GPU alone.
 
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coercitiv

Diamond Member
Jan 24, 2014
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7z is very likely not hitting any power limits, not in my testing, it is sipping power with truckload of LLC misses.
Just for curiosity I locked my 12700K in 6+0 @ 4Ghz and ran the default 7z benchmark. Package power was around 60W. This means that depending on the average silicon quality of the 12400 we might see clock regression in 7z bench and also means the 11400 is very likely power limited in this benchmark.

We have the numbers to prove that is the case for 11400. When removing power limits we get:
  • +12% compression performance
  • +18% decompression performance



I'm not sure if we can directly compare the actual numbers, but it does seem that the RKL 11400 performance numbers touted as better than ADL 12400 are obtained on a platform with higher power limits.

One last point: I also ran the 7z bench with my default 8+0 configuration. Clocks went up around ~4.6Ghz and package power reached my limit of 150W. I don't know what your current configuration is, and whether you're running stock voltage or not, but 7z bench can definitely reach sane power limits on ADL-S.
 
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TheELF

Diamond Member
Dec 22, 2012
3,993
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It doesn't change the core argument that PBO was used and the numbers are flawed for comparison for that reason.

It doesn't matter what unit of measure the chart for Igor's is in because you can't get that average without maintaining that level consistently or exceeding it at various points. It doesn't matter how you want to arrive at it either because it doesn't change even if you just take the total watts and the amount of time to calculate it at the end or how you do it.
Let's say you have CPU that uses 10W per second in that benchmark and finishes in 10 seconds, that would be 100W to finish that bench, if they ran it 3 or more times and got the average of those 3 or more runs to make sure that it's accurate then that's that.
You can run way lower power but the average amount of power to finish the job will still be high.
Not the average amount of power used while running the bench but the sum of power to complete it.
 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
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Let's say you have CPU that uses 10W per second in that benchmark and finishes in 10 seconds, that would be 100W to finish that bench, if they ran it 3 or more times and got the average of those 3 or more runs to make sure that it's accurate then that's that.
You can run way lower power but the average amount of power to finish the job will still be high.
Not the average amount of power used while running the bench but the sum of power to complete it.
Did you not read ? You can't talk about watts that way, its an instantaneous current flow measurement. What you are describing is the way joules are calculated. If its 10 watts, it could be that way forever, its still a 10 watt draw...
 
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tamz_msc

Diamond Member
Jan 5, 2017
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Let's say you have CPU that uses 10W per second in that benchmark and finishes in 10 seconds, that would be 100W to finish that bench, if they ran it 3 or more times and got the average of those 3 or more runs to make sure that it's accurate then that's that.
You can run way lower power but the average amount of power to finish the job will still be high.
Not the average amount of power used while running the bench but the sum of power to complete it.
Watt = joule/s. Watt per second is something else, not instantaneous power draw. 10 seconds at 10 W is 100 joule of total energy spent in running the benchmark.

Electricity is paid for in units of total energy consumed.
 

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
136
TheELF is right, if a cpu uses 10W and needs 10 seconds to finish the benchmark then the power consumption is 10Watt x 10 secs = 100Ws

edit : sorry he said 100w not Ws , he is not right.
But , 100Ws = 100Joules
 

Markfw

Moderator Emeritus, Elite Member
May 16, 2002
25,758
14,785
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Watt = joule/s. Watt per second is something else, not instantaneous power draw. 10 seconds at 10 W is 100 joule of total energy spent in running the benchmark.

Electricity is paid for in units of total energy consumed.
I believe I said that right above your post !
 
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JoeRambo

Golden Member
Jun 13, 2013
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One last point: I also ran the 7z bench with my default 8+0 configuration. Clocks went up around ~4.6Ghz and package power reached my limit of 150W. I don't know what your current configuration is, and whether you're running stock voltage or not, but 7z bench can definitely reach sane power limits on ADL-S.

I did i run on static 4.4ghz and got:




~100W, but this is with 3800CL14 highly tuned and uncore @4.5ghz.

Another point of 5Ghz static:




So i guess @coercitiv is right, and default VID with no undervolt with bad binned die can get limited by TDP.
 

Mopetar

Diamond Member
Jan 31, 2011
8,021
6,473
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Let's say you have CPU that uses 10W per second in that benchmark and finishes in 10 seconds, that would be 100W to finish that bench, if they ran it 3 or more times and got the average of those 3 or more runs to make sure that it's accurate then that's that.

You can run way lower power but the average amount of power to finish the job will still be high.
Not the average amount of power used while running the bench but the sum of power to complete it.

I don't think you're understanding what I'm saying or even what's being argued. Here's a simple experiment you can try yourself. Suppose I tell you to pick 10 numbers such that the average of those numbers will be 8. It is not possible for you to pick numbers that are all below 8.

This is important because the contention was that the numbers from Igor's would only be possible if PBO was being used. You can't get the average that he got without PBO unless the total time of the benchmark is so low that some brief but large spike in power draw that would normally wash out completely over a long period becomes a substantial part of the average.

If you want to have a discussion on efficiency, running in a mode that tanks efficiency is a rather stupid way to go about doing it. I suppose if you wanted to look at the efficiency when a chip is pushed to limits it's fine, but the conclusion will always be the same. It's garbage.
 

Martyprod

Junior Member
Aug 26, 2015
13
0
66
Hello There ! Need some help for doing a hard choice !

I wanted to upgrade to an i7-12700 as i'm buying a fanless / semifanless customised machine. (the computer is build by the manufacturer of the case).
only 65W cpu are allowed, but with a max of 120/140W, so when i saw that the i7-12700 was reaching more than 180w, it was a"no more".
only possibibiliy is a i5-12600. I loose in terms of core and HT but no other choice, unfortunatly i don't find yet reviews or benchmark in apps (it's not for gaming, but for 3D (cinema4D, blender, Unreal Engine, Vegas Pro, Redgiant , AE, Topaz product, Lightwave3d , that kind of things etc).

so was disapointed to buy the non espected CPU, and going down to 6/12 cores only compared to 10/20.

i'm searching an information, because the case builder told me i have two choice : getting a i7-12700 and never using the turbo boost feature, or getting a i5-12600 with turbo boost allowed (hopping it will not go too much above what intel information give on the turbo boost use (117w average).

I already found many benchmark about the i7-12700 running at his 65W use only , so trying to find informations or "help" to choose, to know what the best to get.I know i'll loose a lot of powers, i just hope not too much.thanks for any help !
 

Hulk

Diamond Member
Oct 9, 1999
4,377
2,256
136
The problem with power measurements is that it's a bit of a moving target.

How fast does the CPU complete the test? As we know due to the nonlinear nature of power vs. compute (frequency) the faster you go the more power you consume and at some point it's not a 1:1 ratio. So then the question becomes how do we compare two processors in terms of efficiency? What "weight" do we give to speed? If processor A is 5% more efficient than processor B but B is 40% faster that 5% efficiency gain might not be so important.

Ultimately I think you would have to make a plot of benchmark completion time vs. total power required for the run. Then with curves for both processors in the same plot you could make a proper evaluation.

It's a lot of work, which is why no one does it, but it's really the only way to compare fairly.
 
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DrMrLordX

Lifer
Apr 27, 2000
21,813
11,168
136
Hello There ! Need some help for doing a hard choice !

I wanted to upgrade to an i7-12700 as i'm buying a fanless / semifanless customised machine. (the computer is build by the manufacturer of the case).
only 65W cpu are allowed, but with a max of 120/140W, so when i saw that the i7-12700 was reaching more than 180w, it was a"no more".

There is an Alder Lake builder's thread here:


That might be the better place to ask practical questions about building an Alder Lake-based machine (such as an i7-12700). That being said, you should be able to lower the PL2 value in the UEFI to meet your needs so that it will not reach 180w.
 
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Mopetar

Diamond Member
Jan 31, 2011
8,021
6,473
136
Yeah, just lower the power settings and you should be fine. Intel really pushed the baseline for these chips a bit too far so they have a bit of an undeserved reputation for being power hungry. You can walk back the power settings quite a lot and the performance will barely suffer by comparison.
 
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jpiniero

Lifer
Oct 1, 2010
14,842
5,457
136
Did this get mentioned anywhere? Intel changed the policy so that in order for the OEM to call the IGP "Xe Graphics" on the higher EU mobile the system must be "dual" channel. The ark wording says "Xe Graphics Eligible"
 
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