Monday, April 11th 2022
Intel Planning a Return to HEDT with "Alder Lake-X"?
Enthused with its IPC leadership, Intel is possibly planning a return to the high-end desktop (HEDT) market segment, with the "Alder Lake-X" line of processors, according to a Tom's Hardware report citing a curious-looking addition to an AIDA64 beta change-log. The exact nature of "Alder Lake-X" (ADL-X) still remains a mystery—one theory holds that ADL-X could be a consumer variant of the "Sapphire Rapids" microarchitecture, much like how the 10th Gen Core "Cascade Lake-X" was to "Cascade Lake," a server processor microarchitecture. Given that Intel is calling it "Alder Lake-X" and not "Sapphire Rapids-X," it could even be a whole new client-specific silicon. What's the difference between the two? It's all in the cores.
While both "Alder Lake" and "Sapphire Rapids" come with "Golden Cove" performance cores (P-cores), they use variants of it. Alder Lake has the client-specific variant with 1.25 MB L2 cache, a lighter client-relevant ISA, and other optimizations that enable it to run at higher clock speeds. Sapphire Rapids, on the other hand, will use a server-specific variant of "Golden Cove" that's optimized for the Mesh interconnect, has 2 MB of L2 cache, a server/HPC-relevant ISA, and a propensity to run at lower clock speeds, to support the silicon's overall TDP and high CPU core-count.Intel probably learned from "Skylake-X" and "Cascade Lake-X" that an HEDT processor should match or exceed the mainstream-desktop part at everything (including gaming), so its buyers don't feel like performance of IPC-sensitive/less-parallelized workloads is being traded in for brute multi-threaded performance. ADL-X could hence even be a whole new silicon+package combination, with "Golden Cove" client cores, perhaps some "Gracemont" E-core clusters, and characteristic-HEDT features, such as more memory channels and more PCIe lanes; but most importantly, the ability for the processor to run some of its P-cores at very high clock-speeds.
Source:
Tom's Hardware
While both "Alder Lake" and "Sapphire Rapids" come with "Golden Cove" performance cores (P-cores), they use variants of it. Alder Lake has the client-specific variant with 1.25 MB L2 cache, a lighter client-relevant ISA, and other optimizations that enable it to run at higher clock speeds. Sapphire Rapids, on the other hand, will use a server-specific variant of "Golden Cove" that's optimized for the Mesh interconnect, has 2 MB of L2 cache, a server/HPC-relevant ISA, and a propensity to run at lower clock speeds, to support the silicon's overall TDP and high CPU core-count.Intel probably learned from "Skylake-X" and "Cascade Lake-X" that an HEDT processor should match or exceed the mainstream-desktop part at everything (including gaming), so its buyers don't feel like performance of IPC-sensitive/less-parallelized workloads is being traded in for brute multi-threaded performance. ADL-X could hence even be a whole new silicon+package combination, with "Golden Cove" client cores, perhaps some "Gracemont" E-core clusters, and characteristic-HEDT features, such as more memory channels and more PCIe lanes; but most importantly, the ability for the processor to run some of its P-cores at very high clock-speeds.
57 Comments on Intel Planning a Return to HEDT with "Alder Lake-X"?
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DDR4/DDR5 like Alder Lake. Latest Threadripper that would work with new boards as well as the old ones.
I doubt it would happen, but technically, it doesn't seem that hard to do.
For many "power users" it's not the high core count that's the most appealing with HEDT/workstation platforms, it's more to do with IO. With 2-4 M.2 SSDs, a 10G NIC, a capture card or other special equipment PCIe lanes quickly becomes an issue. And of course lot's of memory bandwidth.
There are multiple reasons why quad-channel Zen 3 TR have not seen the daylight, from wafer/packaging/capacity contraints during the pandemic and contractual obligations to deliver silicon for server, desktop, laptop and console clients, all the way to diminishing need to upgrade HEDT space with this generation of silicon. Zen 2 TR with quad-channel on TRX40 platform still looks good enough and can wait a bit longer for an upgrade. AMD needed to decide on priorities during the pandemic and Intel directly abandoned the HEDT space due to not being able to compete with Threadripper with any good offer. Both companies made right decisions at that period of time. AMD has been and is dominating both HEDT (4 channel, for simplicity) and workstation (8 channel) market right now, with multiple TR SKUs. Core count is always a decision to make and it's never perfect. It does not need to be. It's questionable how much need there has been for more diverse SKUs for HEDT in recent years, somewhere in-between 16-core 5950X on X570 and 24-core Threadripper on TRX40 platforms. Desktop platforms became much faster and broader with the use of PCIe 4.0 and the gap between some X570 and TRX40 platforms is essentially 36 CPU PCIe 4.0 lanes, another 2 memory channels and 8 more cores. It's hard to slot anything meaningful between those two, but this might change with Zen 4.
If there was a pressing need, HEDT (or pre-workstation, if you wish) market would have been addressed by Zen 3. They could have offered two or three Zen 3 TR SKUs with 4 memory channels, but as I explained above, there were other market priorities during the pandemic. Delivering 40 million APUs for the console and laptop spaces has been far more important than a few thousand HEDT chips for enthusiasts. They still released TR PRO for workstation segment. You need to cut somewhere when there was an unprescedented silicon demand in recent 18 months. It's more complex than that. Let's take some rough differences between platforms:
1. X570 desktop 2 channels, 24 PCIe 4.0 CPU lanes (16 PCIe 5.0 on Z690), 3-5 NVMe, 6-8 SATA, 10 GbE LAN on halo boards, 3-4 PCIe slots
2. TRX40 HEDT - 4 channels, 64 PCIe 4.0 CPU lanes, 3-5 NVMe, 6-8 SATA, 10 GbE LAN on high-end, 4-5 PCIe slots and 16 chipset PCIe 4.0
3. WRX8 workst. - 8 channels, 128 PCIe 4.0 CPU lanes, 3-5 NVMe, 6-8 SATA, 10 GbE LAN, 6-7 PCIe slots, 16 chipset PCIe 4.0
4. EPYC server - 8 channels, 128 PCIe 4.0 CPU lanes, many NVMe, x number SATA, dual/more 10 GbE LAN, 8/more PCIe slots, etc.
Platforms 1 and 2 are getting similar in several ways; 3 and 4 are also getting similar.
I/O is more capable on recent desktop platforms and closing the gap to HEDT platforms. Zen 4 will bring even more powerful I/O, extra four PCIe lanes from CPU, more PCIe on the chipset and PCIe 5.0 on halo designs. So, almost HEDT, right? You will only be missing extra memory bandwidth, as PCIe 5.0 lanes can be easily split by using PLX chips and adding more PCIe slots.
We moved to PCIe 4.0 in 2019 and are slowly moving towards PCIe 5.0; plenty of lanes to work with. Many high quality desktop boards on Z690 and X570 already have 4-5 NVMe drives, 10 GbE Aquantia LAN chips and several PCIe slots for different cards and needs. There are also Supermicro client boards with PLX switch chips. MSI offers X570 Godlike which is almost HEDT. On the HEDT side, TRX40 Designare from Gigabyte offers a bit more: four PCIe slots, 4 NVMe, two LAN ports for Teaming and 8 RAM slots.
For "power users", you have options 1 and 2; high quality desktop boards are getting similar to Threadripper boards, minus RAM slots and PCIe lanes. You either go with high-end desktop on 5950X or real HEDT TRX40 with TR. Zen 4 will make those options even more similar, apart from memory channels.
Intel can certainly bring some revival and more competition in this space, as they know that AMD has not released Zen 3 HEDT with quad-channel memory. But Zen 4 is around the corner, pandemic is more under control, less lockdowns, constraints and all..., so Zen 4 Threadripper could be in AMD's portfolio of potential releases next year.
Firstly, Intel has not been present in the segment. Secondly, AMD has been present and has also released Zen 3 TR PRO. It is geared towards workstations, so HEDT on steroids. It works on WRX8 platform which is a more muscular version of TRX4. You cannot put both vendors into the same basket here just because AMD has not updated one single line of products. Silly. Customers can now order Zen 3 TR PRO from EOMs. There are 5 SKUs. If not, they can buy Zen 2 TR. If not, they can wait until Zen 4 or see what Intel releases under code name "Alder Lake-X" or go for older Xeons (not recommended). Simple.
Again, you cannot criticize them on equal foot for HEDT segment, no matter how hard you try. You know very well when was the last time Intel supported anything HEDT, since you know the numbers of sockets. It's a different and distant universe from the one AMD has been serving with Threadripper series and TRX4/WRX8 platforms. You compare them as if they both neglected the HEDT or workstation market in equal manner. Completely silly. Get a grip, be honest about how the current market looks like and make sure you are clear about which company has been more innovative and supportive of HEDT in recent 4-5 years. Only then we can have an accurate exchange of thoughts.
Everyone who has been following the industry knows very well that Intel abandoned this segment for several years. It's a no brainer.
www.kitguru.net/components/cpu/joao-silva/intels-next-gen-hedt-platform-reportedly-coming-in-q3-2022/ Before you hurl another ill-conceived judgement, read my posts and follow-ups more coherently, so that you do not quote a single sentence out of the original context. Or, at least, ask me a question to confirm your suspition before brandishing judgement.
If you had read my original post #41 above, you would have noticed that I said that Intel had not offered anything new for years in HEDT segment. It was in this spirit that I continued with saying that they have not been present in the segment, i.e. with no significant releases for several years since Cascade Lake-X. You do not need to mention Pentium pro. It's enough if you follow the original narrative carefully. Unacceptable for who? I agree that the release has been delayed. Nevertheless, they released those Zen 3 SKUs and they did it when they could, despite all challenges in the pandemic world. The glass is either half-empty or half-full. You chose to see it as half-empty, but you can always change the perspective if you choose not to be stubborn. Focus of what matters now. You can now order the most advanced workstation x86 CPUs ever, in 5 SKUs, or you can continue to complain about it and split hair in half. Just be accurate in how you present information and do not mix up cats with dogs. They are both mammalian, true, but different species. ;-)
We're done. I'm so very glad we have an ignore button. Click!
An optimal development setup would consist of 8-12 cores and 2-3 SSDs, with fast cores for optimal productivity.
Similarly, many content creators would prefer a more responsive workstation over 24+ cores (24+ cores are mostly useful for big batch jobs, those who have those usually have a dedicated server for that), and quite often want 2+ SSDs and special cards for capture etc.
www.asus.com/us/Motherboards-Components/Motherboards/Workstation/Pro-WS-WRX80E-SAGE-SE-WIFI/
But AMD could have easily made TRX40 versions of 5800X/5900X, instead of planning the platform to start at 24 cores. Yes, this is getting very close to what I'm talking about, and would have been great if it launched to non-OEMs 1.5 years ago. Now with Alder Lake on the market it's too little too late.
Irritating..