The Intel Broadwell-E Review: Core i7-6950X, i7-6900K, i7-6850K and i7-6800K Tested
by Ian Cutress on May 31, 2016 2:01 AM EST- Posted in
- CPUs
- Intel
- Enterprise
- Prosumer
- X99
- 14nm
- Broadwell-E
- HEDT
Catching Up: How Intel Can Re-Align Consumer and HEDT
Earlier in this piece I stated three reasons why the enterprise market has an out of step cadence with the latest CPU microarchitecture: product stability, regular releases, and platform longevity.
To get stability, using Intel’s tried and tested core makes sense, rather than the latest and greatest. The longevity of each enterprise platform is such that each socket and chipset generation must last for two CPU cycles, allowing a potential upgrade path, but also means that customers aren’t ripping out their installations every 12-18 months with fresh new ones in order to beat the competition. Also, by being behind the mainstream platform at a slightly slower refresh rate, it allows the release of enterprise CPUs to compensate for any process delay on the latest architecture.
But at this point, we are now a generation and a year behind the mainstream and latest microarchitecture. There are features in the latest mainstream Skylake CPUs, such as Speed Shift (the ability to react to high priority frequency requests up to 20x faster to save power and improve user experience), that are not in the enterprise and HEDT products. If the out-of-step and slower cadence continues, we could be two generations behind fairly easily. However, Intel has (inadvertently) developed a get-out-of-jail free card here.
Earlier in the year we reported that Intel is changing its processor development strategy due to a combination of factors including the slowing of Moore’s Law and the difficulty in creating a smaller lithography node to create processors. Intel was on their tick-tock strategy for around a decade, alternating between smaller nodes and new microarchitecture designs to give performance increases every cycle (or half-cycle). Tick-tock was well received and provided Intel and its investors with a steady expectation and revenue stream when the new product delivered and if it met expectation. When Intel hit several bumps with 14nm, tick-tock became an extended 'tiiiick-toock', slowly lengthening out the time between updates. Then this year Intel said that, for the CPU product line based on the Core microarchitecture family at least, would move to ‘Process-Architecture-Optimization’, or a three-stage cycle for 14nm (the current node) and 10nm (the next node).
On the mainstream product segment, this means that the 14nm family, originally featuring Broadwell (tick) and Skylake (tock), will become Broadwell (process), Skylake (architecture) and Kaby Lake (optimization). The level of ‘optimization’ that Kaby Lake will provide is unknown at this point, but what used to be a 24-month cycle can now become a 36-month cycle very easily.
But it is not immediately obvious what this means to the enterprise segment. One would naturally expect the segment to follow the PAO implementation, albeit slower. Here’s Intel’s potential trick for the future: depending on the level of ‘optimization’ in the final stage of the cycle, the enterprise segment has the potential to just bypass and ignore it, keeping the cycle length the same and giving Intel an opportunity to realign the microarchitectures. The net product would be 36 month cycles, spanning 3 product generations at the consumer level and 2 product generations at the enterprise/HEDT level.
That being said, it’s a little bit of conjecture. We have spoken to some senior members of Intel about this, and it was acknowledged that it could be a potential strategy, however as expected nothing like this would be confirmed in a casual conversation even if it was decided at a senior level. It will make an interesting point when the enterprise market rolls around to Skylake-E and Skylake-EP based cores and beyond, if Kaby Lake-E will be a ‘thing’ or not.
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sor - Sunday, June 5, 2016 - link
Actually, without those benchmarks I wouldn't have known for sure that we were GPU limited or that CPU makes almost NO difference (I might have expected a few more FPS). I also found it interesting that one game stood out as being CPU limited.IUU - Sunday, June 5, 2016 - link
All good and awesome but Intel's persistence on maintaining many-core cpus as niche expensiveproducts is a dangerous strategy, that may ultimately lead to its downfall.
If the IT world would like to see a renewed growth, high performance computing should enter the lives of ordinary Joes. Plenty of apps could make their way into our lives via many-core cpus.
Games with really improved AI, local voice and image recognition, reading comprehension, advanced text editing, advanced 3d printing, etc etc.
Looking down on the needs of ordinary people, is nonsensical, for it is "simple joes", the needs of which led to many core cpus and advanced gpus,that the hpc world so much uses. No further development can come if the same old strategy is not applied.
Motion2082 - Monday, June 6, 2016 - link
What other XEONs would you recommend for 8 core?craveable - Tuesday, June 7, 2016 - link
Seriously, guys. My personal opinion is to skip Broadwell-E, unless you absolutely cannot wait till Q1 2017. It's a very realistic timeframe when Skylake-E will be released. Some journalist spotted a Gigabyte motherboard on Computex 2016, suited for Skylake-E, sporting a new LGA 3647 socket and 6-channel memory controller. Memory bandwidth was always a crucial selling point of HEDT CPUs, so a transition from 4 (current) to 6 (Skylake-E) is an important incremental update.craveable - Tuesday, June 7, 2016 - link
However, further studying of leaks reveled that the next HEDT will be released in Q2 2017 and be probably named Skylake-X. In the leaked roadmap the Skylake-X availability timeframe is strangely the same as for Kaby Lake-X.craveable - Wednesday, June 8, 2016 - link
However #2, it's likely, that only server part of Skylake (EP) will get LGA 3647 and 6-channel controller. And Skylake-X will get 4 channels and the same LGA 2011-3.galta - Wednesday, June 8, 2016 - link
There is no point in saying that someone should skip upgrading. But for budget constraints, if your processor is not good enough, you have to upgrade; if it still performs as you need, you do not need to upgrade, even if new generation has the same price and 50% more performance.It is said that Intel is trying to milk us with a +USD1,700 cpu and that not all softwares (games) are fully optimized for more than 2-4 cores, but if you still run a i7 9xx series, it is probably time to upgrade, even if Broadwell-E increase in performance is not huge.
mapesdhs - Thursday, June 9, 2016 - link
That makes no sense. You state that BW-E performance increase isn't that much, while saying someone with an X58 6c should still upgrade anyway. What for? Why would someone on a constrained budget spend so much for so little speed gain? Given the platform differences, X58 users would probably benefit more from newer storage tech such as M2 and newer USB3x, in which case a 5930K on a decent board would be more sensible (or a 5820K if they don't need the PCIe lanes). What you've suggested just sounds like upgrading for its own sake. These days there are far more nuanced options available, especially from the used market.fifa17 - Sunday, June 12, 2016 - link
I'm putting a system together and I'm stuck between Core i7-6850K and Core i7-6800K on a ROG STRIX X99 GAMING motherboard. The only confusing point is the number of PCI Express Lanes which is 28 for i7-6800K and 40 for the other. I've pre ordered the ASUS ROG Strix GeForce® GTX 1080 and don't plan on adding a second one in the future. I'm also not getting an optical drive of any sort and no HDDs. Just a 1TB Samsung 850 PRO SSD. Which CPU should I choose? Any ideas about these components?legolasyiu - Wednesday, June 29, 2016 - link
It will be best to get Core i7 6850 with 40 lanes for GTX 1080 16x with 850 Pro.