DrMrLordX
Lifer
- Apr 27, 2000
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That would really depend on why Intel's DDR5 controller on Alder Lake isn't performing well (per se) and what Intel is doing to improve that situation.
I don't recall Anandtech for Chips and Cheese stating anything negative about the memory controller. To be honest, the Alder Lake's DDR5 performance turned out to be much better than what I thought it was going to be. Before release, there were all these benchmarks going around with sky high latency scores, but the release silicon performed significantly better.
With DDR5 frequencies at 6ghz and CL36, Alder Lake begins to pull away significantly from the fastest DDR4 memory in the majority of applications. When DDR5 7ghz becomes available, I expect it will leave DDR4 in the dust when paired with Raptor or Meteor Lake and approach the 40ns latency scores that Coffee Lake had with elite DDR4.
DrMrLordX
Lifer
- Apr 27, 2000
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It's more of an opinion held by some users here whom I would regard as being well-informed on the subject.
I can talk about DDR4 only, but DDR5 latencies are not stellar either.
Highly tuned, same clock DDR4 ~3900-4000 same CL, similar secondaries/tertiaries is 10ns slower than Comet Lake. 10ns is like 20-30% more latency.
Stock, DDR4 3200 latency is as bad as ZEN3 that has MC on different die. Quite an achievement if you ask me.
Just because performance is great, does not mean IMC is not mobile class and hindering the chip. Only some of that extra latency can be explained by equally horrible L3 cache latency, same sized L3 is somehow 50+% slower than AMD's ( and of course slows down each LLC miss with it ). So it can be concluded that it is bad.
So no, ADL is not "okay". It is great, wide core with huge potential bolted to mobile phone worthy uncore ( mobile phone as in not including Apple chips ).
Highly tuned, same clock DDR4 ~3900-4000 same CL, similar secondaries/tertiaries is 10ns slower than Comet Lake. 10ns is like 20-30% more latency.
Stock, DDR4 3200 latency is as bad as ZEN3 that has MC on different die. Quite an achievement if you ask me.
Just because performance is great, does not mean IMC is not mobile class and hindering the chip. Only some of that extra latency can be explained by equally horrible L3 cache latency, same sized L3 is somehow 50+% slower than AMD's ( and of course slows down each LLC miss with it ). So it can be concluded that it is bad.
So no, ADL is not "okay". It is great, wide core with huge potential bolted to mobile phone worthy uncore ( mobile phone as in not including Apple chips ).
Maybe the 30-40% MT improvement comes from the Core i5 lineup, they go from 6+0 to 6+8 which will give these SKUs a big MT boost no doubt. There is also some perf/w improvement potential for Gracemont. If Raptor comes with a separate voltage rail for Gracemont they don't have to use the same Vcore from the faster clocked P cores.
dullard
Elite Member
- May 21, 2001
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I don't think people ever really appreciated the benefit of independent channels on a memory module. Yes, the first piece of data has high latency. But, you can now request the second piece of data before the first one is in. And the third piece before the 2nd data is in. Etc. This has the effect of a massive latency drop for every piece of memory after the first. But of course, only the latency of the first piece of data was discussed prior to launch.
Also, if you have the money, 10 nm latency DDR5 is now available. CL2 6400:
Are you a human?
Thunder 57
Golden Member
- Aug 19, 2007
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1.40V on DDR5? I don't know if I'd want to be the guinea pig to test that.Also, if you have the money, 10 nm latency DDR5 is now available. CL2 6400:
It doesn't have the sub 8 ns of the best DDR4, but it is getting closer and closer.Are you a human?
www.newegg.com
Since when has he ever been the first out the door with an accurate leak? Raptor Lake mobile is not coming this year. That is his first issue. One can guestimate that Raptor Lake S launches in Q3, that isn't a hard one.
I've never seen a "techtuber" get anything right, unless they are pulling from someone off twitter who already provided the leak prior.
dullard
Elite Member
- May 21, 2001
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First to Cypress Cove on Rocket Lake:
Intel Rocket Lake-S CPU spotted running with PCIe 4.0 NVMe SSD - VideoCardz.com
Intel finally catching up. Intel Rocket Lake-S with PCI-Express 4.0 support We are slowly approaching Intel’s 11th Gen Core series, as more leaks and rumors start to appear. Last week we reported that first engineering samples are reaching 5.0 GHz, indicating that the new desktop series will be...
videocardz.com
Here were his early Alder Lake predictions (note, not all came true, the 8+0 didn't materialize):
Existence of 12 core to 64 core Threadrippers:
AMD Ryzen Threadripper PRO 3975WX also spotted - VideoCardz.com
UPDATE: We have posted the full specifications of the new TR PRO series here AMD Ryzen Threadripper PRO on Lenovo workstation leaks Yet another Threadripper PRO processor has been found by APISAK. This time we are looking at a 32-core model for the upcoming Lenovo workstation systems. The entry...
videocardz.com
How many do I need to post to answer your question?
As many times as needed until you provide valid sources or stop claiming he is the one leaking things: https://mobile.twitter.com/search?f=live&q=intel rocket lake until:2020-05-21&src=typed_queryFirst to Cypress Cove on Rocket Lake:
Intel Rocket Lake-S CPU spotted running with PCIe 4.0 NVMe SSD - VideoCardz.com
Intel finally catching up. Intel Rocket Lake-S with PCI-Express 4.0 support We are slowly approaching Intel’s 11th Gen Core series, as more leaks and rumors start to appear. Last week we reported that first engineering samples are reaching 5.0 GHz, indicating that the new desktop series will be...
Here were his early Alder Lake predictions (note, not all came true, the 8+0 didn't materialize):
Existence of 12 core to 64 core Threadrippers:
AMD Ryzen Threadripper PRO 3975WX also spotted - VideoCardz.com
UPDATE: We have posted the full specifications of the new TR PRO series here AMD Ryzen Threadripper PRO on Lenovo workstation leaks Yet another Threadripper PRO processor has been found by APISAK. This time we are looking at a 32-core model for the upcoming Lenovo workstation systems. The entry...
How many do I need to post to answer your question?
1. Using Cinebench R23, Golden Cove at 5GHz is 2.61 times more performance than Gracemont at 4GHz.
2. As a 12700K user 8 Golden Coves are sufficient for foreground applications. I'm rarely waiting unless it's a video render. The 16 E "background" cores of Raptor Lake would be very helpful to my work flow as they would essentially be like an additional 6 Golden Coves.
3. I doubt Raptor will increase frequency over Alder Lake. Higher ST than 5.2GHz 12900K? Higher than the coming 5.5GHz ST model? Better than 5.0GHz all-core? Any increases will be insignificant as Intel is already knocking at the wall and it's ain't budging.
4. Where are the Zen 4 leaks?
2. As a 12700K user 8 Golden Coves are sufficient for foreground applications. I'm rarely waiting unless it's a video render. The 16 E "background" cores of Raptor Lake would be very helpful to my work flow as they would essentially be like an additional 6 Golden Coves.
3. I doubt Raptor will increase frequency over Alder Lake. Higher ST than 5.2GHz 12900K? Higher than the coming 5.5GHz ST model? Better than 5.0GHz all-core? Any increases will be insignificant as Intel is already knocking at the wall and it's ain't budging.
4. Where are the Zen 4 leaks?
Might it have to do with the hybrid nature of the memory controller, utilizing both DDR4 and DDR5?
Honestly, DDR5 to me seems like the most exotic memory we've had on desktop PCs since Rambus's RDRAM. It seems to defy most expectations based on latency performance, because as @dullard said, it has two independent memory channels per module which allows greater memory level parallelism. I have never seen memory performance impact gaming to the degree that it has with DDR5. Case in point, one of the most CPU intensive modern games available today absolutely loves DDR5:
Will increasing the L2 cache size in Raptor Cove impact the latency of the L3 cache?
Yeah I have to agree here. Whatever the increase in frequency Intel manages to glean with Raptor Lake, it will be the least impactful of the rumored 8-15% performance gain. Most of that performance will be due to cache size increase and hopefully a latency decrease for the L3 cache that @JoeRambo alluded to, as well as minor architectural tweaks which improve IPC.
Unless Zen 4 blows it out of the water (which I doubt) I will be rocking a Raptor Lake based system later this year, probably with a 13900K.
Yes. Raptor will rely heavily on a better tuned memory subsystem for most of the ST performance increase I think. Moving from +8 to +16 will provide the jump in MT performance, especially if they give GM a little more cache to work with.
For me Raptor Lake won't be much of a test for Intel. They already passed the architectural "test" with ADL. The real test will be after Intel 7 when they have to transition to a new node.
A 40% MT Boost would put it at 37,000 points in CBR23
hothardware.com
Intel Raptor Lake May Arrive In Q3 With A Massive 40 Percent Performance Lift
Intel's next chips might come along a little quicker than expected—and pack a mean punch, too.
dullard
Elite Member
- May 21, 2001
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The sources that I linked were the ones claiming that Moore's Law is Dead mentioned it first. Complain to them.
I'm not sure what you meant with that link. From what I saw at a quick glance, it had no mention of any of the Moore's Law is Dead leaks that I posted.
coercitiv
Diamond Member
- Jan 24, 2014
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So much for dreams of increased efficiency on RPL. Then again, we get more performance... so I guess that's a good thing.
- May 16, 2002
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What I would have liked was half the power on the P cores, and no E cores, but twice the P cores. 16 P cores @ 4 ghz at optimal power would be AWESOME.
Saylick
Golden Member
- Sep 10, 2012
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Hold on now, Ian specifically says "Next-gen" Atom cores here. Raptorlake still uses Gracemont, so it can be said that they aren't next-gen. Could Ian be referring to Meteorlake? Given the new node, it doesn't seem farfetched that the Atom cores are clocked higher as well.
IntelUser2000
Elite Member
- Oct 14, 2003
- 8,168
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Next-Gen Atom, so that's Meteorlake or after. Raptorlake uses Gracemont cores.
I wonder about the logic of pushing E core frequency that high. If they can do it without pipeline increase sure. You increase frequency, then you improve architecture, then you end up with them being the new Core.
Ok I thought of another reason. If they think increasing interconnect frequency is difficult when E cores are active - then boost E core frequency. Seems like a brute force method though if true.
IntelUser2000
Elite Member
- Oct 14, 2003
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Thinking more about it, 4.5GHz makes some sense in a desktop K scenario to take absolute performance lead.
ChipsandCheese says it doesn't make sense to push Gracemont above 3.5GHz, yet it's already exceeded in Alderlake. If they are putting 16 or more of them in Meteorlake desktop, pushing clocks for the E clocks will significantly impact MT performance.
Yes it's inefficient, but it's focusing on max performance. If the E cores are stuck at 3.9GHz it's limited in what Intel can do to target a market. 4.5GHz+ gives them flexibility in this way.
My worry is that if they need to resort to increasing pipeline stages and losing perf/clock to do so and whether such core can be efficient at 2-3GHz clock frequencies.
I've seen that Intel can be competitive in their bread and butter PC area. They need to be able to show they can go beyond that. Like a proper Tablet chip so they can organically penetrate the market, not forced as with Airmont generation.
ChipsandCheese says it doesn't make sense to push Gracemont above 3.5GHz, yet it's already exceeded in Alderlake. If they are putting 16 or more of them in Meteorlake desktop, pushing clocks for the E clocks will significantly impact MT performance.
Yes it's inefficient, but it's focusing on max performance. If the E cores are stuck at 3.9GHz it's limited in what Intel can do to target a market. 4.5GHz+ gives them flexibility in this way.
My worry is that if they need to resort to increasing pipeline stages and losing perf/clock to do so and whether such core can be efficient at 2-3GHz clock frequencies.
I've seen that Intel can be competitive in their bread and butter PC area. They need to be able to show they can go beyond that. Like a proper Tablet chip so they can organically penetrate the market, not forced as with Airmont generation.
DrMrLordX
Lifer
- Apr 27, 2000
- 19,344
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You are, of course, correct. 16c Golden Cove would wipe the floor with Vermeer and with enough optimizations would be . . . well I don't know if it would compete with Raphael but it would be an interesting fight. Regardless, it seems like Intel can't or won't go down that road on 10ESF. Not with "small" consumer CPUs, and by "small" I mean "nowhere near the size of a Sapphire Rapids tile".
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