Intel 3rd Gen Xeon Scalable (Ice Lake SP) Review: Generationally Big, Competitively Smallby Andrei Frumusanu on April 6, 2021 11:00 AM EST
- Posted in
- Xeon Scalable
- Ice Lake-SP
Section by Ian Cutress
The launch of Intel’s Ice Lake Xeon Scalable processors has been in the wings for a number of years. The delays to Intel’s 10nm manufacturing process have given a number of setbacks to all of Intel’s proposed 10nm product lines, especially the high performance Xeon family: trying to craft 660 mm2 of silicon on a process is difficult at the best of times. But Intel has 10nm in a place where it is economically viable to start retailing large Xeon processors, and the official launch today of Intel’s 3rd Generation Xeon Scalable is on the back of over 200,000+ units shipped to major customers to date. The new flagship, the Xeon Platinum 8380, has 40 cores, offers PCIe 4.0, and takes advantage of the IPC gain in Intel’s Sunny Cove processor core. We’re testing it against the best in the market.
Intel’s 3rd Generation Xeon Scalable: 10nm Goes Enterprise
Today Intel is launching the full stack of processors under the 3rd Generation Xeon Scalable Ice Lake branding, built upon its 10nm process. These processors, up to 40 cores per socket, are designed solely for single socket and dual socket systems, competing in a market with other x86 and Arm options available. With this new generation, Intel’s offering is aimed to be two-fold: first, the generational uplift compared to 2nd Gen, but also the narrative around selling a solution rather than simply selling a processor.
Intel’s messaging with its new Ice Lake Xeon Scalable (ICX or ICL-SP) steers away from simple single core or multicore performance, and instead is that the unique feature set, such as AVX-512, DLBoost, cryptography acceleration, and security, along with appropriate software optimizations or paired with specialist Intel family products, such as Optane DC Persistent Memory, Agilex FPGAs/SmartNICs, or 800-series Ethernet, offer better performance and better metrics for those actually buying the systems. This angle, Intel believes, puts it in a better position than its competitors that only offer a limited subset of these features, or lack the infrastructure to unite these products under a single easy-to-use brand.
An Wafer of 40-core Ice Lake Xeon 10nm Processors
Nonetheless, the launch of a new generation of products and an expanded portfolio warrants the product to actually be put under test for its raw base performance claims. This generation of Xeon Scalable, Intel’s first on 10nm, uses a newer architecture Sunny Cove core. Benefits of this core, as explained by Intel, start with an extra 20% raw performance increase, enabled through a much wider core with an improved front end and a more execution resources. Outside of the core, memory bandwidth is improved both by increasing memory channels from six to eight, but also new memory prefetch techniques and optimizations that increases bandwidth up to 100% with another +25% efficiency. The mesh interconnect between the cores also uses updated algorithms to feed IO to and from the cores, and Intel is promoting better power management through independent power management agents inside each IP block.
On top of this, Intel is layering on accelerative features, stating that over the raw performance, software optimized for these accelerators will see a better-than-generational uplift. This starts with the basic core layout, especially as it pertains to SIMD commands such as SSSE, AVX, AVX2, and AVX-512: Intel is enabling better cryptography support across its ISA, enabling AES, SHA, GFNI, and other instructions to run simultaneously across all vector instruction sets. AVX-512 has improved frequencies during more complex bit operations for ICX with smarter mapping between instructions and power draw, offering an extra 10% frequency for all 256-bit instructions. On top of this is Intel’s Speed Select Technologies, such as Performance Profile, Base Frequency improvements, Turbo Frequency improvements, and Core Power assistance to ensure peak per-core performance or quality of service during a heavily utilized system depending on customer requirements. Other new features include Software Guard Extensions, enabling enclave sizes up to 512 GB per socket with select models.
Ice Lake’s Sunny Cove Core: Part 2
The Sunny Cove core has actually already been in the market. Intel has made a consumer variant of the core and a server variant of the core. Ice Lake Xeon has the server variant, with bigger caches and slightly different optimization points, but it’s the consumer variant that we have seen and tested in laptop form. Sunny Cove is part of Intel’s Ice Lake notebook processor portfolio, which we reviewed the performance back on August 1st 2019, which 614 days ago. That length of time between enabling a core for notebooks and enabling the same core (with upgrades for servers) on enterprise is almost unheard of, but indicative of Intel’s troubles in manufacturing.
Nonetheless, in our notebook testing of the Ice Lake core, we saw a raw +17-18% performance over the previous generation, however this was at the expense of 15-20% in frequency. Where the product truly excelled was in memory limited scenarios, where a new memory controller provided better-than-generational uplift. When it comes to this generation of Xeon Scalable processors with the new core, as you see in the review, in non-accelerated workloads we get very much a similar story. That being said, consumer hardware is very often TDP limited, especially laptops! With the new Ice Lake Xeon platform, Intel is boosting the peak TDP from 205 W to 270 W, which also gives additional performance advantages.
The Headline Act: Intel’s Xeon Platinum 8380
The head prefect of Intel’s new processor lineup is the Platinum 8380 - a full fat 40 core behemoth. If we put it side by side with the previous generation processors, there some key specifications to note.
|Intel Xeon Comparison: 3rd Gen vs 2nd Gen
Peak vs Peak
|40 / 80||Cores / Threads||28 / 56|
|2900 / 3400 / 3000||Base / ST / MT Freq||2700 / 4000 / 3300|
|50 MB + 60 MB||L2 + L3 Cache||28 MB + 38.5 MB|
|270 W||TDP||205 W|
|PCIe 4.0 x64||PCIe||PCIe 3.0 x48|
|8 x DDR4-3200||DRAM Support||6 x DDR4-2933|
|4 TB||DRAM Capacity||1 TB|
|4 TB Optane
+ 2 TB DRAM
|1 TB DDR4-2666
+ 1.5 TB
|512 GB||SGX Enclave||None|
|1P, 2P||Socket Support||1P, 2P, 4P, 8P|
|3 x 11.2 GT/s||UPI Links||3 x 10.4 GT/s|
6258R, 2P Variant
is only $3950
Between these processors, the new flagship has a number of positives:
- +43% more cores (40 vs 28),
- nearly double the cache,
- +33% more PCIe lanes (64 vs 48),
- 2x the PCIe bandwidth (PCIe 4.0 vs PCIe 3.0)
- 4x the memory support (4 TB vs 1 TB)
- SGX Enclave support
- +7% higher socket-to-socket bandwidth
- Support for DDR4-3200 Optane DCPMM 200-series
- Price is down 20%... or up 100% if you compare to 6258R
Though we should perhaps highlight some of the negatives:
- TDP is up +32% (270 W vs 205 W)
- ST Frequency is down (3400 MHz vs 4000 MHz)
- MT Frequency is down (3000 MHz vs 3300 MHz)
If we combine the specification sheet cores and all-core (MT) frequency, Ice Lake actually has about the same efficiency here as the previous generation. Modern high-performance processors often operate well outside the peak efficiency window, however Ice Lake being at a lower frequency would usually suggest that Ice Lake is having to operate closer to the peak efficiency point to stay within a suitable socket TDP than previous generations. This is similar to what we saw in the laptop space.
Features across all Ice Lake Xeon Scalable processors
We’ll dive into the different processors over on the next page, however it is worth noting some of the key features that will apply to all of Intel’s new ICL-SP family. Across the ~40 new processors, including all the media focused parts, the network focused processors, and all the individual optimizations used, all of the processors will have the following:
All Ice Lake Xeons will support eight channels of DDR4-3200 at 2DPC(new info)
- All Ice Lake Xeons will support 4 TB of DRAM per socket
- All Ice Lake Xeons will support SGX Enclaves (size will vary)
- All Ice Lake Xeons will support 64x PCIe 4.0 lanes
- All Ice Lake Xeons will support 2x FMA
- Platinum/Gold Xeons will support 3x UPI links at 11.2 GT/s, Silver is 2x links at 10.4 GT/s
- Platinum/Gold Xeons will support 200-series Optane DC Persistent Memory
In the past, Intel has often productized some of these features at will sell the ones that are more capable at a higher cost. This segmentation is often borne from a lack of competition in the market. This time around however, Intel has seen fit to unify some of its segmentation for consistency. The key one in my mind is memory support: at the start of the Xeon Scalable family, Intel started to charge extra for high-capacity memory models. But in light of the competition now offering 4 TB/socket at no extra cost, it would appear that Intel has decided to unify the stack with one memory support option.
Intel 3rd Generation Xeon Scalable: New Socket, New Motherboards
Ice Lake Xeons, now with eight memory channels rather than six, will require a new socket and new motherboards. Ice Lake comes with 4189 pins, and requires an LGA4189-4 ‘Whitley’ motherboard. This is different to the LGA4189-5 ‘Cedar Island’ in use for Cooper Lake, and the two are not interoperable, however they do share a power profile.
This actually brings us onto a point about Intel’s portfolio. Technically 10nm Ice Lake is not the only member of the 3rd Gen Xeon Scalable family – Intel has seen fit to bundle both 14nm Cooper Lake and 10nm Ice Lake under the same heading. Intel is separating the two by stating that Cooper Lake is focused at several specific high volume customers looking to deploy quad-socket and eight-socket systems with specific AI workloads. By comparison, Ice Lake is for the mass market, and limited to two socket systems.
Ice Lake and Cooper Lake both have the ‘3’ in the processor name indicating third generation. Users can tell which ones are Cooper Lake because they end in either H or HL – Ice Lake processors (as we’ll see on the next page) never have H or HL. Most Cooper Lake processors are Platinum models anyway, with a few Xeon Gold. As we go through this review, we’ll focus solely on Ice Lake, given that this is the platform Intel is selling to the mainstream.
In the lead up to this launch today, Intel provided us with a 2U system featuring two of the top models of Ice Lake Xeon: we have dual 40 core Xeon Platinum 8380s! At the same time, we have also spent time a dual Xeon Gold 6330 system from Supermicro, which has two 28-core processors, and acts as a good comparison to the previous generation Xeon Platinum 8280.
Our review today will cover the processor stack, our benchmarks, power analysis, memory analysis, and some initial conclusions.
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Oxford Guy - Sunday, April 11, 2021 - link'The faulty logic I see is that you seem to believe it's the review's job to...'
'I think it could be appropriate to do that sort of thing, in articles that...'
Don't contradict yourself or anything.
If you're not interested in knowing how fast a CPU is that's ... well... I don't know.
Telling people to go for marketing info (which is inherently deceptive — the entire fundamental reason for marketing departments to exist) is obviously silly.
mode_13h - Monday, April 12, 2021 - link> Don't contradict yourself or anything.
I think the point of confusion is that I'm drawing a distinction between the initial product review and subsequent follow-up articles they often publish to examine specific points of interest. This would also allow for more time to do a more thorough investigation, since the initial reviews tend to be conducted under strict deadlines.
> If you're not interested in knowing how fast a CPU is that's ... well... I don't know.
There's often a distinction between the performance, as users are most likely to experience it, and the full capabilities of the product. I actually want to know both, but I think the former should be the (initial) priority.
ballsystemlord - Thursday, April 8, 2021 - linkSpelling and grammar errors (there are a lot!):
"At the same time, we have also spent time a dual Xeon Gold 6330 system from Supermicro, which has two 28-core processors,..."
Nonsensical English: "time a duel". I haven't the faintest what you were trying to say.
"DRAM latencies here are reduced by 1.7ns, which isn't very much a significant difference,..."
Either use "very much", or use "a significant":
DRAM latencies here are reduced by 1.7ns, which isn't a very significant difference,..."
"Inspecting Intel's prior disclosures about Ice Lake SP in last year's HotChips presentations, one point sticks out, and that's is the "SpecI2M optimisation" where the system is able to convert traditional RFO (Read for ownership) memory operations into another mechanism"
"Inspecting Intel's prior disclosures about Ice Lake SP in last year's HotChips presentations, one point sticks out, and that's the "SpecI2M optimisation" where the system is able to convert traditional RFO (Read for ownership) memory operations into another mechanism"
"It's a bit unfortunate that system vendors have ended up publishing STREAM results with hyper optimised binaries that are compiled with non-temporal instructions from the get-go, as for example we would not have seen this new mechanism on Ice Lake SP with them"
You need to rewrite the sentance or add more commas to break it up:
"It's a bit unfortunate that system vendors have ended up publishing STREAM results with hyper optimised binaries that are compiled with non-temporal instructions from the get-go, as, for example, we would not have seen this new mechanism on Ice Lake SP with them"
"The latter STREAM results were really great to see as I view is a true design innovation that will benefit a lot of workloads."
Exchange "is" for "this as":
"The latter STREAM results were really great to see as I view this as a true design innovation that will benefit a lot of workloads."
Or discard "view" and rewrite as a diffinitive instead of as an opinion:
"The latter STREAM results were really great to see as this is a true design innovation that will benefit a lot of workloads."
"Intel's new Ice Lake SP system, similarly to the predecessor Cascade Lake SP system, appear to be very efficient at full system idle,..."
"Intel's new Ice Lake SP system, similarly to the predecessor Cascade Lake SP system, appears to be very efficient at full system idle,..."
"...the new Ice Lake part to most of the time beat the Cascade Lake part,..."
"to" doesn't belong. Rewrite:
"...the new Ice Lake part can beat the Cascade Lake part most of the time,..."
"...both showcasing figures that are still 25 and 15% ahead of the Xeon 8380."
"...both showcasing figures that are still 25% and 15% ahead of the Xeon 8380."
"Intel had been pushing very hard the software optimisation side of things,..."
Poor sentance structure:
"Intel had been pushing the software optimisation side very hard,..."
"...which unfortunately didn't have enough time to cover for this piece."
"...which unfortunately we didn't have enough time to cover for this piece."
"While we are exalted to finally see Ice lake SP reach the market,..."
"excited" not "exalted":
"While we are excited to finally see Ice lake SP reach the market,..."
Thanks for the article!
Oxford Guy - Sunday, April 11, 2021 - linkPerhaps Purch would be willing to take you on as a volunteer unpaid intern for proofreading for spelling and grammar?
I would think there are people out there who would do it for resume building. So... if it bothers you perhaps you should make an inquiry.
evilpaul666 - Saturday, April 10, 2021 - linkAre the W-1300s going to use 10nm this year?
mode_13h - Saturday, April 10, 2021 - linkYou mean the bottom-tier Xeons? Those are just mainstream desktop chips with less features disabled, so that question depends on when Alder Lake hits.
I'd say "no", because the Xeon versions typically lag the corresponding mainstream chips by a few months. So, if Alder Lake launches in November, then maybe we get the Xeons in February-March of next year.
The more immediate question is whether they'll release a Xeon version of Rocket Lake. I think that's likely, since they skipped Comet Lake and there are significant platform enhancements for Rocket Lake.
AdrianBc - Monday, April 12, 2021 - linkNo, the W-1300 Xeons will be Rocket Lake. The top model will be Xeon W-1390P, which will be equivalent to the top i9 Rocket Lake, with 125 W TDP and 5.3 GHz maximum turbo.
rahvin - Tuesday, April 20, 2021 - linkAndre does some of the best server reviews available, IMO.
KKK11 - Tuesday, May 11, 2021 - linkThat is a curious-looking wafer. I thought it was fake at first but then I noticed the alignment notch. Actually, I'm still not convinced it's real because I have seen lots and lots of wafers in various stages of production and I have never seen one where partial chips go all the way out to the edges. It's a waste of time to deal with those in the steppers so no one does that.