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Intel Core i9-13900K Raptor Lake Caches Confirmed through leaked CPU-Z screenshot: 68MB L2+L3

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Summary

In a blurry CPU-Z screenshot Intel Raptor Lake cache sizes have been confirmed. To fight AMD's impressive 3D V-Cache technology Intel's Core i9-13900K 13th Gen Raptor Lake-S desktop processor has 68 MB of L2 and L3 on-die caches. 

 

g7ThsQCkgAHBMLnm.jpg.d8cb8106d711eeb4359a4a7d498f9e0a.jpg

 

eafmCLxYWZTRKsCD.thumb.jpg.b00da856852cea911e5a60f2400da64f.jpg

 

 

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Back in January, we heard the first reports of Intel significantly increasing the on-die cache sizes on its 13th Gen Core "Raptor Lake-S" desktop processor, with the sum total of L2 and L3 caches on the silicon being 68 MB. A CPU-Z screenshot from the same source as the January story has confirmed the cache sizes. 

 

As the screenshot will confirm, Each Raptor Cove P performance core has 2 MB of dedicated L2 cache, up from 1.25 MB on Alder Lake-S. Gracemont has 16 E-cores in 4 clusters, while "Alder Lake-S" has 8 in 2 clusters. Each cluster's four cores share L2 cache. Intel quadrupled "Alder Lake" L2 cache from 2 MB to 4 MB. The chip's shared L3 cache is now 36 MB. Eight 2 MB P-cores and four 4 MB E-core clusters total 32 MB L2 cache. L2+L3 cache is 68 MB.

 

Intel is reportedly cranking up the CPU clocks on its Raptor Lake CPUs, where we might see the dizzying silicon heights of 5.8GHz. Intel is going to be throwing everything it can at the 13th Gen Core CPUs; with higher CPU clocks, more cache, and more cores. Intel is promising "up to double digit performance boost" as well as "enhanced overclocking features". 

 

  • Intel Core i9 K-Series (8 Golden + 16 Grace) = 24 Cores / 32 Threads / 68 MB?
  • Intel Core i7 K-Series (8 Golden + 8 Grace) = 16 Cores / 24 Threads / 54 MB?
  • Intel Core i5 K-Series (6 Golden + 8 Grace) = 14 Cores / 20 Threads / 44 MB?
  • Intel Core i5 S-Series (6 Golden + 4 Grace) = 14 Cores / 16 Threads / 37 MB?
  • Intel Core i3 S-Series (4 Golden + 0 Grace) = 4 Cores / 8 Threads / 20 MB?
  • Intel Pentium S-Series (2 Golden + 0 Grace) = 4 Cores / 4 Threads / 10 MB?


The above list is what we could expect from Intel's new 13th Gen Core "Raptor Lake" CPUs (and their boosted cache amounts).

 

My thoughts

It appears Intel is going the AMD route here by adding more cache; as large on-die caches are major proponents of gaming and IPC performance. Sometimes it pays to be a follower and not a leader I guess, as Intel appears to be following in AMD's footsteps here. Not that that is a bad thing in this case, as the increase in cache compared to Alder Lake is a 55% with Raptor Lake. Cannot wait to see benchmarks of Raptor Lake, especially up against Zen 4. Next-Gen CPU performance is looking exceedingly bright. Lastly, the clock speeds that AMD and Intel are supposedly pushing with these next-Gen CPUs is mind-blowing if true (5.2-5.6GHz with Zen 4 and up to 5.8GHz with Raptor Lake).

 

Sources

https://www.techpowerup.com/295005/intel-raptor-lake-s-cache-sizes-confirmed-in-blurry-cpu-z-screenshot-68mb-l2-l3

https://www.tweaktown.com/news/86290/intel-core-i9-13900k-raptor-lake-cpu-68mb-of-l3-cache-spotted/index.html

https://www.guru3d.com/news-story/intel-raptor-lake-caches-confirmed-through-leaked-cpu-z-screenshot.html 

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As a point of reference, that is 34x the L2 that the Pentium 4 HT series has. 

 

That's quite a lot of cache indeed... can't wait for CAD benchmarks on these to see if there's a massive improvement. 

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To put the caches in context relative to Alder Lake:

L3 seems unchanged at 3MB/unit.

 

L2 are where the gains are.

P cores go from 1.25MB/core to 2MB/core.

4x E core group goes from 2MB to 4MB, although L2 is usually not shared so divide by 4 to make it per-core. Skylake was 256k/core, so even Alder Lake E cores had double that and we're doubling again.

 

We already have an example of Intel making an update product with bigger cache. We can see that with Ice Lake to Tiger Lake transition also. Ice Lake had 0.5MB/core L2, and 2MB/core L3. Tiger Lake had 1.25MB/core L2, and 3MB/core L3. Between those there was no microarchitecture change, and boosts to performance came from a combination of the bigger caches and updated process technology leading to higher clocks and more efficiency.

 

Zen 2&3 have 0.5MB/core L2 and 4MB/core L3. (12MB/core L3 for the X3D). It is an interesting balance and optimisation choice they make for their overall architecture where it tends towards smaller cache is faster. Misses at one layer brings the next layer into play.

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This is going to be a god tier high refresh rate gaming CPU. That cache increase and whatever clockspeed and IPC increase there is, I'm expecting 1% and .1% lows to be at least 20% better than 12900K in esports games. Not really a game changer considering you can already tweak the 12900K to hit 300fps in most esports games, but maybe the 13700K or 13600K will bring that performance in at a lower price.

Sad they're increasing the ecores though, they don't do anything for gaming except lower your 1% and .1% lows and make you feel like you need to install Dumpster Fire 11.

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This is not Intel's response to AMD 3D V-cache.

 

This article make it sound like Intel just heard AMD 3D V-Cache and decided to copy it.

 

Intel Raptor Lake would have taken many years to be planned and designed and fabbed by Intel.

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1 hour ago, rcarlos243 said:

This is not Intel's response to AMD 3D V-cache.

 

This article make it sound like Intel just heard AMD 3D V-Cache and decided to copy it.

 

Intel Raptor Lake would have taken many years to be planned and designed and fabbed by Intel.

Even AMD needed around 2 years to bolt 3D V-Cache on top of existing 5800X which they designed years prior. Just to show how long it takes to just modify an existing design. Because if AMD had 5800X3D ready on launch of Alder lake, they'd launch it then to sort of kick Intel in the nuts and deny them gaming crown. Or at least nudge it off a bit. But it came quite a bit later.

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The cores themselves must have a lot of juice on tap if Intel is dedicating so much die space on cache to keep them fed. Prime time for AVX-512, maybe?

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