The Intel Xeon D Review: Performance Per Watt Server SoC Champion?
by Johan De Gelas on June 23, 2015 8:35 AM EST- Posted in
- CPUs
- Intel
- Xeon-D
- Broadwell-DE
Memory Subsystem: Bandwidth
As more memory channels complicate motherboard design and can be a problem for dense servers, the Xeon-D, Xeon E3 and Atom C2000 only have two memory channels. This makes quad channel operation a good way to differentiate up to the Xeon E5. The Xeon E3 and Atom are limited to DDR3-1600 as per JEDEC specifications, whereas the Xeon D should be able to command more bandwidth due to the use of DDR4-2133 DIMMs.
We measured the memory bandwidth in Linux. The binary was compiled with the Open64 compiler 5.0 (Opencc). It is a multi-threaded, OpenMP based, 64-bit binary. The following compiler switches were used:
-Ofast -mp -ipa
To keep things simple, we only report the Triad sub-benchmark of our OpenMP enabled Stream benchmark.
Using DIMMs with a 33% higher clock, the Xeon D gets a 25-38% boost in bandwidth compared to the Xeon E3. Basically, every percent increase in clock speed is translated in higher bandwidth. The Xeon E5 has almost twice as much bandwidth for only 50% more cores and should as result do better in some bandwidth intensive applications (mostly HPC).
Facebook
Twitter
RSS
90 Comments
View All Comments
AkulaClass - Tuesday, June 23, 2015 - link
Nice stuff. Realy good to see them bringing power consumption down pr. Performance.WorldWithoutMadness - Tuesday, June 23, 2015 - link
Nice way to confuse people. Codename Yosemiteretrospooty - Tuesday, June 23, 2015 - link
Who would this confuse? Apple fans because of the OS witht he same codename?LOL. Believe me they don't know, or care... Most of them aren't even aware of what a "server" chip is, or even what a "server" is used for.
IanHagen - Tuesday, June 23, 2015 - link
Rails developer checking in to remind you that a great chunk of the Rails community develop using OS X to deploy on Linux and hence is aware of "server chips". Even though you said that "most" Apple users don't know what a server chip is and that's accurate, the same could be said about Windows or even Linux common users. Stop patronizing.All being said, I agree with you. Who could possibly confound the Xeon D's codename coincides with OS X's 10.10 name?
WinterCharm - Tuesday, June 23, 2015 - link
First of all, your implication that apple fans don't know jack shit about servers is a broad generalization, and a stupid one at that.Second of all, anyone who knows enough to even consider buying a Xeon and a motherboard that supports it and the ECC memory, probably knows enough to not get confused. And plenty of mac users know what server chips are and what they're used for.
Nice trolling though.
adithyay328 - Tuesday, August 25, 2015 - link
That's not entirely true, but I will agree that people a lot of the people who use Apples( No discrimination intended) only continue to use Apple due to their lack of tech knowledge( like knowing Android is the king :) . And, yes, they probably won;t know what servers even are.jeffsci - Monday, June 29, 2015 - link
Geographic code names are the norm in the computing industry (I think because they cannot be copyrighted) and they end up being reused. For example, Intel Seattle is/was a motherboard and AMD Seattle is/was an ARM64 processor. See https://en.wikipedia.org/wiki/List_of_Intel_codena... https://en.wikipedia.org/wiki/List_of_Microsoft_co... etc. if you would like to look for more examples :-)RaiderJ - Tuesday, June 23, 2015 - link
Any places in the US that the motherboard is available for purchase? Quick checks looks like it's mostly sold out or otherwise unavailable?ats - Tuesday, June 23, 2015 - link
Availability comes and goes. Xeon D has been a big hit in the large scale deployment markets and they've been soaking up a lot of demand for it, both bare and combined on motherboards like the supermicro offerings severely limiting retail availability. But it is available in retail but quantities are limited. Quite a number of people over at servethehome have gotten their hands on them. If you want one, you'll likely have to keep checking the major sites like newegg, amazon, et al for them to come back in stock. Retail boards are generally in the $800-1000 range atm (basically going for full list but then again bare motherboards with 10gbe tend to go for 600+ so its still a good buy and simple new 10gbe cards tend to go for $300-500).ToTTenTranz - Tuesday, June 23, 2015 - link
How come they call this a SoC if there's no integrated module to drive even a simple display, and they apparently need a discrete PCIe graphics card for that D-SUB output?