Intel Haswell-EP Xeon 12 Core Review: E5-2650L V3 and E5-2690 V3
by Ian Cutress on November 6, 2014 9:00 AM EST- Posted in
- CPUs
- IT Computing
- Intel
- Xeon
- Enterprise
- LGA2011-3
- Haswell EP
Intel Haswell-EP 12 Cores Conclusion
At the beginning of the review we outlined what seemed like a shift in Intel's binning strategy when it comes to Haswell-EP. Given the lack of competition for in most areas of the server market (there are areas where other cores make more sense) Intel could do one of two things. The first option, stagnation, allows competitors to catch up while at the same time allowing Intel to perhaps improve on designs with little gain and little cost to research and development. Though one issue with stagnation, when you are your only competition, ultimately results in customers not wanting to upgrade and reduces revenue. The other option is diversification, and this is what we think is happening with the wide range of models available with Haswell-EP.
By discussing with their big customers, Intel now has several dozen CPU models for only three general dies. Most of these models are part of a road map and designed to improve yields, while others are for specific customers only or have longer life support. With the die product volume Intel has in its fabs, it has the opportunity to be very aggressive with its binning implementation, resulting in several high core, high frequency or low power models. In previous generations, customers could only pick one of those three, but with Haswell-EP most customers can hone in on at least two preferences.
Today we examined two of Intel's 12 core options: the 'typical' stack model in the E5-2690 V3, offering a 2.6 GHz base frequency at 135W for $2090, and the low power optimized E5-2650L V3 which offers a 1.8GHz base frequency, 2.5 GHz turbo, at 65W for $1330.
As expected, the E5-2690 V3 performed better in all of our benchmarks by virtue of the frequency advantage during both single core and multicore operation. In terms of performance for price, or performance per power, the E5-2650L V3 wins out here. At only 65% of the cost, and just under 50% of the power, the cost per computation per watt falls firmly on the side of the E5-2650L V3. Although for compute limited throughout, in absolute terms, the E5-2650L V3 still ends up slower and one of the weakest Xeons we have tested due to the frequency difference. One of the important factors missed by the performance-per-watt analogy is how many units of work, and the cost of that work is, per unit time.
As part of this review we were able to source two E5-2650L V3 CPUs with a dual CPU motherboard and offer a more competitive analysis at 130-135W total TDP against the E5-2690 V3. In these results, anything that was single threaded still fell on the side of the E5-2690 V3 due to its single core frequency advantage. Despite our predictions, relatively few software packages that we came across were won by the dual E5-2650L V3 system, making the E5-2690 V3 the CPU of choice. This was especially true for software that could use multiple cores but could not take advantage of a 2P arrangement. The best example of this is video conversion at low quality which relies on a lot of crosstalk between encoded frames and memory accesses that might not be NUMA aware. The only reason in this regard to choose a 2x E5-2650L V3 over a 1x E5-2690 V3 would be for the double memory support, or for the few benchmarks where the 2P configuration won (Hybrid x265, Cinebench R15). The single CPU option is cheaper, easier to manage and works better across the board.
Our next installment of Haswell-EP coverage involves two 14 core models. The 14 core design is a little odd, being outside of the regular scope normally considered for core counts (12/16) and representing a semi-irregular arrangement of cores. Ultimately it relies on the 18-core die being cut down. As always, our CPU review data from past and present can be found in the CPU section of our results comparison database, Bench.
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really amazing http://taupintar.blogspot.comremosito - Tuesday, November 11, 2014 - link
Anybody can clue me in why in Linux NPB and redis benchmarks single 4820K/4790K totally own single and dual Xeons. Or a Dual 2650Lv3 does worse than a single 2650Lv3?personne - Wednesday, November 12, 2014 - link
Indeed. Redis is single threaded, and all the other CPUs are faster, but not three times as fast, so some analysis of what's going on would be appreciated.GGuess - Saturday, December 6, 2014 - link
There should be a line of discussion of why haven't CPU speeds increased in the past 5years in a significant way. My 5yr old Intel I7 is a 4 core at 3GHz. The ones discussed here are only 6 or 8 cores and run stock in the mid-3 to 4GHz range. So over 5yrs, the CPU capability has not grown 2 to 3times faster, and that only applies to applications that can use the extra cores and hyper-threading. The usual rule we work to is that people won't even notice a 50% speed increase. It has to be 2 to 3 times before it is noticed. Previously, a 3year refresh of a computer resulted in a 5 to 10x computer speed increase.With the current barely noticeable 2x, why bother with the trouble of an upgrade? No wonder Intel's and AMD's sales figures are failing to grow.
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