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chuckula
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Skylake-X Round 2: 7980XE, 18 COARZ

Mon May 29, 2017 7:21 am

So some new rumors with a semi-credible looking Intel marketing slide to back them up indicate that the relatively well documented Skylake-X lineup going up to 12 cores is just the first wave of the launch. Sometime in the future (probably Q4) the Skylake-X line will expand to include even moar coarz with 14, 16, and an 18 core model hitting the market.

This isn't entirely unprecedented as people have successfully run 18 core Xeon parts in X99 motherboards (See Linus Tech Tips).

So if 16 cores just aren't ripping up your threads enough, an 18 core part might be an epyc solution to your problem.
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ptsant
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Mon May 29, 2017 8:58 am

I guess Intel had been keeping these for 2025, until suddenly ... competition happened.

Whatever your preferred platform (AMD or Intel). This is good news.
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Mon May 29, 2017 10:29 am

Speaking of running lots of cores on consumer chipsets, I'm still on X79 and thinking of getting an E5-2690 (v1 or v2) off eBay. They're relatively cheap next to the E5-2687W which got famous, but have the same max turbo speed and the same if not more cores at a lower TDP. My board (X79 UD7) ought to be able to run all cores at the max speed too.
 
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Mon May 29, 2017 11:23 pm

chuckula wrote:
So some new rumors with a semi-credible looking Intel marketing slide to back them up indicate that the relatively well documented Skylake-X lineup going up to 12 cores is just the first wave of the launch. Sometime in the future (probably Q4) the Skylake-X line will expand to include even moar coarz with 14, 16, and an 18 core model hitting the market.

This isn't entirely unprecedented as people have successfully run 18 core Xeon parts in X99 motherboards (See Linus Tech Tips).

So if 16 cores just aren't ripping up your threads enough, an 18 core part might be an epyc solution to your problem.


That's only for Socket 2011 chips. The upcoming Skylake-X refresh is going to be Socket 2066 and Socket 3647.
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Ifalna
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Mon May 29, 2017 11:30 pm

ptsant wrote:
I guess Intel had been keeping these for 2025, until suddenly ... competition happened.
Whatever your preferred platform (AMD or Intel). This is good news.

Unless said competition leads to a significant bump in single threaded throughput, most consumer workloads won't give a damn, and so will non gullible consumers.
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Mon May 29, 2017 11:58 pm

chuckula wrote:
So some new rumors with a semi-credible looking Intel marketing slide to back them up indicate that the relatively well documented Skylake-X lineup going up to 12 cores is just the first wave of the launch. Sometime in the future (probably Q4) the Skylake-X line will expand to include even moar coarz with 14, 16, and an 18 core model hitting the market.

This isn't entirely unprecedented as people have successfully run 18 core Xeon parts in X99 motherboards (See Linus Tech Tips).

So if 16 cores just aren't ripping up your threads enough, an 18 core part might be an epyc solution to your problem.



Pretty sure you wet your pants in excitement after reading this news.
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Tue May 30, 2017 12:21 am

Ifalna wrote:
ptsant wrote:
I guess Intel had been keeping these for 2025, until suddenly ... competition happened.
Whatever your preferred platform (AMD or Intel). This is good news.

Unless said competition leads to a significant bump in single threaded throughput, most consumer workloads won't give a damn, and so will non gullible consumers.


These chips have a new cache architecture and I would predict a new on-die interconnect. These will have an impact on single threaded and multithreaded performance with existing applications.

These chips also feature AVX-512 which not only doubles the width of the AVX registers to 512 bit as the name implies, but also double the number of registers. It also adds some dedicated mask registers too. Once applications take advantage of these, there should also be another performance boost. The biggest impact will be applications that already make use of AVX and AVX2.
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chuckula
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Tue May 30, 2017 5:24 am

Krogoth wrote:
That's only for Socket 2011 chips. The upcoming Skylake-X refresh is going to be Socket 2066 and Socket 3647.


Sorry Krogoth, but the official announcement is unimpressed with that line of thinking.
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ptsant
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Tue May 30, 2017 7:03 am

Ifalna wrote:
ptsant wrote:
I guess Intel had been keeping these for 2025, until suddenly ... competition happened.
Whatever your preferred platform (AMD or Intel). This is good news.

Unless said competition leads to a significant bump in single threaded throughput, most consumer workloads won't give a damn, and so will non gullible consumers.


With the exception of games, almost all workloads are either (a) trivial for a modern CPU (excel, word, watching youtube, typing emails) or (b) parallel (video creation/compression, photo editing, rendering, file compression, compilation, simulation/modeling, scientific applications). And I'm not talking server here (VMs, DBs etc). Even gaming will slowly transition to using more and more threads, as programmers figure the algorithms and invest the time to build the infrastructure. As I've said before, if only 2-3 AAA 3d engines transition to using more threads (3-4 instead of 1-2) then all of a sudden 80% of games will benefit. It takes time and money to do this, but it is not inherently impossible.

Single threaded performance was "free" for the programmers while it lasted. There will be improvements, but right now the jump from 4c to 8c or 12c or more is much bigger than the yearly sub-10% single-threaded improvement.
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Tue May 30, 2017 7:53 am

I'll be looking forward to the 32-core Naples vs Intel Skylake Xeons benchmarks later this year.

What's interesting is that AMD has 48-core Ryzen chips coming to servers in the next 6-12 months and Intel is still currently charging $4200 for a 22-core Xeon clocked down at 2.2GHz.

Ryzen's pretty decent as a consumer chip, but it's not the best single-threaded option in a largely single-threaded consumer market. In the server market though, AMD have the potential to murder Intel. Here's hoping they don't f*** it up!
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Tue May 30, 2017 8:31 am

Chrispy_ wrote:
In the server market though, AMD have the potential to murder Intel. Here's hoping they don't f*** it up!

Kinda, for general servers though not in the HPC market.

Has to get past the gatekeepers at Dell &c first, though :(

I'd also like to see the full set of model-specific operating frequencies published in reviews of these things, AVX base, 1T and all-core frequencies as well as the non-AVX equivalents. We know that e.g. the max non-AVX clock of the i9-7900X is 4.3 GHz, but what's the AVX base, 2.8, 3.1, 2.6 ?
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Tue May 30, 2017 11:17 am

ptsant wrote:
As I've said before, if only 2-3 AAA 3d engines transition to using more threads (3-4 instead of 1-2) then all of a sudden 80% of games will benefit. It takes time and money to do this, but it is not inherently impossible.

Single threaded performance was "free" for the programmers while it lasted. There will be improvements, but right now the jump from 4c to 8c or 12c or more is much bigger than the yearly sub-10% single-threaded improvement.

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Kougar
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Wed May 31, 2017 9:30 am

I can't justify the cost of an entire new platform just to double my core count, but I sure do want a 7820X. AMD's going to lose sales to that one.

Edited, meant the 7820X
Last edited by Kougar on Fri Jun 02, 2017 3:08 am, edited 1 time in total.
 
Topinio
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Thu Jun 01, 2017 8:12 am

Kougar wrote:
I can't justify the cost of an entire new platform just to double my core count, but I sure do want a 7920X. AMD's going to lose sales to that one.

Possibly, but I doubt there are many people who would actually have bought an AMD ThreadRipper who will decide to flip for the $1.2k Intel chip.

Core i9-7920X is 12C/24T and allegedly 2.9 GHz base and 165 W.

ThreadRipper 1956X is supposedly 12C/24T @3.2 GHz base and 125 W, and there are supposed to be 5 models above that -- all with at least 10% higher clocks and up to 33% more cores than the 7920X. They will beat it on many if not most workloads.

If any or all of these come in under $1200, for AMD to actually lose sales would be unlikely. Maybe some people will buy the i9 and say AMD lost their sale, but I'd suspect most of them wouldn't have bought an AMD CPU anyway.
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Wherefor art thou ECC?

Thu Jun 01, 2017 9:05 am

Very curious to see how the pricing works out on amd for both cpus and motherboards, as you are getting 64 lanes (minus a few, but >44) no matter what vs $1k minimum entry for intel's 44.

FWIW I already have 22 cores on X99, the 2066 vs 3467 segmentation is rather arbitrary per intel SOP. They have been squeezing and 'optimizing' their customers for so long it is second nature.

No mentions of xeons for 2066 either and the models released so far do not support ECC (source: ark) so are they going to deny ECC to the socket completely? If so that is a big win for amd simply due to massive arrogance. But hey, this is the same guys that made itanic and tried to foist the rambust joke on the world.

Another related question is registered memory support (not load reduced, just rimm) as right now that does work with xeons on X99 using motherboards that don't suck.
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Kougar
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Re: Skylake-X Round 2: 7980XE, 18 COARZ

Fri Jun 02, 2017 3:18 am

Sorry Topinio, I had meant the 7820X so I corrected my post. I think $600 is generally the cutoff point for higher volume sales.

The 7820X has a 3.6Ghz base clock, 8-cores, and tops at 4.5Ghz. The base clock and core parity with Ryzen should let it beat Ryzen in all benchmarks, and that is before the reported cache improvements or higher frequency quad-channel RAM advantage.

On the flipside, AMD must have agreed as AMD just gave the 1800X a $40 price cut to $460, so it remains attractively positioned against the upcoming 7820X. $140 price difference + a more expensive platform starts to become a noticeable tradeoff.. Fun times :D

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