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
OpenFoam
Computational Fluid Dynamics is a very important part of the HPC world. Several readers told us that we should look into OpenFoam and calculating aerodynamics that involves the use of CFD software.
We use a realworld test case as benchmark. All tests were done on OpenFoam 2.2.1 and openmpi-1.6.3.
We also found AVX code inside OpenFoam 2.2.1, so we assume that this is one of the cases where AVX improves FP performance.
HPC code is where the Xeon E5 makes a lot more sense than the cheaper Xeons. The Xeon E5 is no less than 80% faster with 50% more cores than the Xeon D. In this case, the Xeon D does not make the previous Xeons E3 look ridiculous: the Xeon D runs the job about 33% faster. Let us zoom in.
OpenFoam scales much better on the Xeon E5, and we've seen previously that a second CPU boost performance by 90% offering near linear scaleability. Double the number of cores again and you get another very respectable 60%. Eight cores are 34% faster than four, and 4.1 times faster than one.
Compares this to the horrible scaling of the Xeon E3 v2: 4 cores are slower than one. The Xeon E3 v3 fixed that somewhat, and doubles the performance over the same range. The eight cores of the Xeon D are about 2.8 times faster than one - that is decent scaling but nowhere near the Xeon E5. There are several reasons for this, but the most obvious one is that the Xeon E5 really benefits from the fact that it has almost twice the amount of bandwidth available. To be fair, Intel does not list HPC as a target market for the Xeon D. If the improved AVX2 capabilities and the pricing might have tempted you to use the Xeon D in your next workstation/HPC server, know that the Xeon D can not always deliver the full potential of the 8 Broadwell cores, despite having access to DDR4-2133.
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Krysto - Tuesday, June 23, 2015 - link
Betteridge law.Metaluna - Tuesday, June 23, 2015 - link
...fails in this case. Did you read the review?CajunArson - Tuesday, June 23, 2015 - link
While desktop Broadwell isn't all that great, these server parts really show off Intel's accomplishments in improving power efficiency and performance-per-watt with 14nm.ARM has a huge hill to climb to really compete with these parts, and we've already seen AMD effectively skip its first iteration of an ARM product because they probably got wind of the Xeon D and decided they would have to do both a die-shrink and completely customized ARM core just to keep up.
The_Assimilator - Tuesday, June 23, 2015 - link
I very much doubt whether we'll ever see another server CPU from AMD, regardless of ARM cores or not. If they even manage to get Zen out the door, *and* it's not another massive flop, I will be impressed.Refuge - Tuesday, June 23, 2015 - link
I root for them everyday, but lets not give them too big of a hill to climb with a broken leg now. lolextide - Tuesday, June 23, 2015 - link
Take it easy man, AMD is not going down the drain any time soon, and we WILL see some future server oriented parts come from them. But how fast will they be? That's the question and we wont know for a while...Kjella - Tuesday, June 23, 2015 - link
Really? Last quarter they had a $187 million total comprehensive loss on $1030 million in revenue, even if you exclude the restructuring cost they lost $100 million for a -10% deficit. The stockholder's equity is almost gone with $17 million left, after that getting funding or a credit limit will become much harder.And Q2 is probably going to be another bloody quarter with no major CPU or GPU launches and firesales of old Win8 stock in preparation for Win10. The console ramp-up is usually in Q3 in preparation for Christmas, not before the summer. Last quarter's loss they took almost entirely from their cash reserves, they're now in the lower end of what they need to operate, if they lose this quarter too they must cut where it hurts bad.
Guspaz - Tuesday, June 23, 2015 - link
When we needed a low-power and low-cost server solution, we went with a desktop i3, because for some reason Intel supports ECC RAM on the i3 and lower, but not in the i5 and higher.julianb - Tuesday, June 23, 2015 - link
Very interested in this SOC.If possible could we see how the Xeon D deal with Cinebench Multithreaded test?
I am into 3D CPU rendering and would like to know how does the Xeon D-1540 compare to say i7-3930K or i7-4790K.
I realize the purpose of Xeon D-1540's existence is different but still...
Thank you.
MrSpadge - Saturday, June 27, 2015 - link
An eco-tuned 5820K seem better. I don't suppose you're going to render 24/7 all the time, so the electricity savings from the 14 nm Broadwell will have a hard time making up for the massive difference in initial cost.