News Intel Alder Lake CPU Alleged Specs Expose 5.3 GHz Boost Clock, 228W PL2

spongiemaster

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My magic 8 ball says intels marketing team will say our chip has moar cores so it's better
No, they won't. Even if Intel counted the small cores the same as the large cores, what math would they use to claim the 16 cores in the 12900k were more than the 16 cores in the 5950x? The Pentium math bug was with division, not addition.
 
No, they won't. Even if Intel counted the small cores the same as the large cores, what math would they use to claim the 16 cores in the 12900k were more than the 16 cores in the 5950x? The Pentium math bug was with division, not addition.
Moar cores than the previous intel CPU not compared to AMD.
How they compare to AMD will be based on the performance, regardless of the amount of cores.
 

peachpuff

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No, they won't. Even if Intel counted the small cores the same as the large cores, what math would they use to claim the 16 cores in the 12900k were more than the 16 cores in the 5950x? The Pentium math bug was with division, not addition.
The 5950x wont compete with the 12900k, it'll compete with the 8core 5800x.
 

spongiemaster

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The 5950x wont compete with the 12900k, it'll compete with the 8core 5800x.
No, it won't. The 11900k competes with the 5800x. If the 12900x does as well with 8 GoldenCove cores and 8 more Gracemont cores, something went very wrong.

Edit: Also, the 11900k MSRP's at $550. There is absolutely no chance at all that the 12900k retails for $450 at launch. It will not be a direct competitor to the 5800x.
 
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No, it won't. The 11900k competes with the 5800x. If the 12900x does as well with 8 GoldenCove cores and 8 more Gracemont cores, something went very wrong.

Edit: Also, the 11900k MSRP's at $550. There is absolutely no chance at all that the 12900k retails for $450 at launch. It will not be a direct competitor to the 5800x.
The 5800x is on the same level as the 11700k in applications, and about the same power draw if power limits are enforced.
The 11700 has an average of 120W with power limits enforced and the 5800x without PBO is at roughly 110W average in the tested productivity apps.
https://www.tomshardware.com/reviews/intel-core-i7-11700k-cpu-review/2
 

Sippincider

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How many cores can the i9-12900K run at full boost for extended periods, before thermals come into play? Interested in this chip but looking to see real-word numbers.

Somewhere there's a practical limit of how much heat you can draw off a given area of silicon. :) (Without resorting to impractical stuff like liquid helium...)
 

PCWarrior

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Let’s break it down.
• The 12900K has 8 big cores with hyperthreading plus 8 little cores without hyperthreading.
• The single-threaded performance of the big Golden Cove cores in Cinebench will likely be around 30% higher than the Sunny Cove cores found in 11900K.
• It is possible the multithreaded performance of the big cores when working together to be further improved due to improvements in hyperthreading, due to larger shared cache sizes, due to DDR5, etc. So far, when the all-core and single-core frequency is the same, the multithreaded score with hyperthreading is equal to the single threaded score times the number of physical cores times 1.25. It is possible that Intel manages to increase the latter factor from 1.25x to 1.3x yielding a further 4% IPC improvement in multithreaded workloads.
• So best case scenario for the big cores is to have a combined multithreaded IPC improvement of 1.3*1.04=1.35x. That’s 35% IPC uplift (in MT Cinebench).
• The 11900K with adaptive boost does around 6200 in CB R20. Assuming same clock speeds from the 8 big cores of the 12900K we get from them 8370 points.
• The 8 little cores should be behaving like Skylake cores. Since they don’t have hyperthreading it will be around what an i7 9700K can do when clocked at 3.7GHz on all cores. Scaling based on the 9700K gives that the 8 little cores should contribute around 2870 points.
• Adding the two scores together gives us 11240 points, which is right on with the 11300 estimate that has surfaced recently in Chinese forums.
 
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spongiemaster

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This is not a good sign for people waiting to buy Alder Lake to enjoy better perf/watt
?
Alder Lake is expected to have 20% higher IPC than Rocket Lake with up to double the MT performance.

https://www.notebookcheck.net/Leaked-Alder-Lake-slides-highlight-key-single-and-multi-threaded-performance-gains-core-configuration-and-more.528546.0.html

And the PL2 rating is 9% lower than Rocket Lake. How does 20-100% better performance with less power not result in a gigantic per/watt improvement?
 
Let’s break it down.
• The 12900K has 8 big cores with hyperthreading plus 8 little cores without hyperthreading.
• The single-threaded performance of the big Golden Cove cores in Cinebench will likely be around 30% higher than the Sunny Cove cores found in 11900K.
• It is possible the multithreaded performance of the big cores when working together to be further improved due to improvements in hyperthreading, due to larger shared cache sizes, due to DDR5, etc. So far, when the all-core and single-core frequency is the same, the multithreaded score with hyperthreading is equal to the single threaded score times the number of physical cores times 1.25. It is possible that Intel manages to increase the latter factor from 1.25x to 1.3x yielding a further 4% IPC improvement in multithreaded workloads.
• So best case scenario for the big cores is to have a combined multithreaded IPC improvement of 1.3*1.04=1.35x. That’s 35% IPC uplift (in MT Cinebench).
• The 11900K with adaptive boost does around 6200 in CB R20. Assuming same clock speeds from the 8 big cores of the 12900K we get from them 8370 points.
• The 8 little cores should be behaving like Skylake cores. Since they don’t have hyperthreading it will be around what an i7 9700K can do when clocked at 3.7GHz on all cores. Scaling based on the 9700K gives that the 8 little cores should contribute around 2870 points.
• Adding the two scores together gives us 11240 points, which is right on with the 11300 estimate that has surfaced recently in Chinese forums.
That's a very good break down.

For perspective:
5800X =~6200 CB R20 MT
5950X =~10500 CB R20 MT

That's assuming linear scaling across the cores in your calculation, which I'll say it's generous, but fair at this point. Just keep in mind the scheduler had to be reworked and the little cores won't run at the same high speeds as the big cores, so you'll have to shave off some points there to account for that. I think this CPU will be a pain to bench accurately, but it'll be an interesting experiment to see how it unfolds!

Regards.
 

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