To Broadwell-E or no to Broadwell-E. The is the question!

If you"re an enthusiast and that Nehalem or Sandy leg setup you developed years earlier is prepared for a replacement, you might be considering one X99 motherboard build. The operative concern then becomes, "should i wait because that Broadwell-E or simply buy Haswell-E and also be done v it?" after ~ a weekend at PAX east talking to number of SIs, Intel employees, and also all the various other hardware vendors, we were maybe to obtain a couple of bits and also pieces of information that may aid you make your decision, yet first, let"s look at at some numbers.

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Broadwell-E i7-6950X vs. Haswell-E i7-5960X: Is that faster?

Instructions per clock (IPC) is a common measurement that CPU performance. Complying with the traditional tick improvements, Broadwell had about a 5% IPC acquire when contrasted to Haswell. Unfortunately, because of the power saving style of the chip, it likewise came in ~ a slower stock frequency 보다 the Haswell CPU. Because that example, the i7-4770K came manufacturing facility clocked in ~ 3.5GHz if the factory setup on the Broadwell i7, the 5775C, to be 3.3GHz. This properly brings it earlier to the very same level together the Haswell CPU. You"re getting much more IPC, but there space fewer cycles every second. This void is even more pronounced once considering the even higher "default" frequency that the i7-4790K. Assuming this trends organize true, over there won"t it is in any benefit for Broadwell-E over Haswell-E in this department.

Broadwell-E Leaked Specs

Cores/ThreadsFrequency / TurboTotal CacheMemory SpeedTDP
i7-6950X10/203.0GHz / 3.5GHz25MB2400MHz140W
i7-6900K8/163.2GHz / 3.7GHz20MB2400MHz140W
i7-6850K6/123.6GHz / 3.8GHz15MB2400MHz140W
i7-6800K6/123.4GHz / 3.6GHz15MB2400MHz140W

Intel Broadwell-E Overclocking

Users who have an X99 motherboard are more than likely going come overclock your CPUs. If us extrapolate Haswell and also Broadwell, data we"ll see that points don"t look an extremely promising because that our challenger here, either. Forum users and also other published reports showed that both Haswell"s 4770K and also Broadwell"s 5775C overclocked, ~ above average, somewhere in between 22-30% (with Broadwell"s typical being 1-2 percentage points higher). Store in mind that the 5775C starts in ~ a lower stock clock speed, meaning that that may simply have much more delta to the top overclock. The similarity between these 2 chips overclocking is likely due to the reality that they"re both sporting the same incorporated voltage regulator (IVR) which has a far-ranging impact on the OC.

If this very same parallel occurs in the Haswell-E and Broadwell-E, climate the Broadwell-E CPUs will likely do nothing an ext than enhance the 43-67% OC variety that we experienced on Haswell-E. As soon as again, this quantities to no compelling reason to wait on the BW-E chips. One final note top top overclocking and IVRs: don"t expect excessive Edition CPU overclocking to boost much until Skylake-E, because that"s once you"re likely to see that IVR walk away. Us don"t recommend waiting the long, though; it might be 12 or an ext months out.

Broadwell-E main point Count and Cache – Multithreading


(Above: i7-5960X Haswell-E architecture / dice shot diagram)

In testing, one place that Broadwell did outperform Haswell remained in a few multithreaded applications. These tiny victories were most often attributed to the extra 128MB the eDRAM that acted together L4 cache when the IGP was not in use. However, we"ll speculate right here thatthe crystal Well design that afforded Broadwell the L4 cache won"t be current in Broadwell-E, seeing together no extreme Edition (EE) Intel processor has actually yet to encompass an IGP. The being said, also the small victory that Broadwell declared over Haswell may be a closer competition v the extreme Edition CPUs.

Looking additional into the cache and multithreading argument, we keep in mind that the Haswell K-SKU i7s both had actually 2MB of L3 cache allocated every core, and also after them, the Broadwell i7 had actually 1.5MB of L3 per core. In the EE jump, Haswell saw an additional 500KB that L3 included per core. We"ll view that exact same 500KB per core for Broadwell-E, assuming this trend continues (and that is one assumption).

Using an easy math we might assume the Haswell-E maintains the clear advantage here together well; however, when Haswell-E debuted with 6- and also 8-core models, freshly leaked info leads united state to think that Broadwell-E will have actually 6-, 8-, and 10-core models. If this is the case, climate the BW-E and HW-E luxury models will both have actually 20MB of L3 cache and the advantage would walk to BW-E due to the fact that of the 10C/20T count. Users need to keep in mind the this benefit would only present up in extremely multithreaded applications, such together rendering through Premiere or similar, and it would certainly most likely have little to no affect on gaming uneven something stunner happens through Dx12 or Vulkan (and nothing the crazy should happen).

Broadwell-E PCIe lanes


Above: Slide initially leaked through VR-zone.com.

The just other place to look at for benefits for the Broadwell-E style is in the number of PCIe lanes. Once again, guessing the the architectural similarities remain, us don"t expect any kind of changes here in between the 2 line-ups. Haswell-E yields 28/40 lanes (depending ~ above CPU), and also we"d mean Broadwell-E will probably have actually the same.

What come do? to buy Haswell-E or Wait because that Broadwell-E?

At this moment in time, with lot trend-based data prediction, GN would say the benefit goes come the more immediate Haswell-E purchases. This is likewise aided through the fact that Broadwell-E will run on the X99 platform, and also so firmware updates will certainly "patch" numerous boards to work in the occasion an update is later desired. Broadwell-E doesn"t look prefer it will certainly be faster, nor does the seem most likely to overclock better, and also it"s likely to possess, in ~ best, the same number of PCIe lanes as its predecessor.

See more: He'S Not Looking For Anything Serious ’ Really Means

The only feasible place that BW-E shows up to have actually an advantage is in ~ the top-end for particular use cases. If, after reading all of this, you"re still no convinced and also you"re willing to wait for the newest EE CPU, climate word on the show floor is the you shouldn"t need to wait long. Part exhibitors appeared to suggest that the release could be as soon as next month, when others were hinting the it may be sometime this quarter. One of two people way, most likely a summer launch – and that coincides with vault Intel EE CPU releases. Us hope this details will aid you do a good, informed decision in structure your following enthusiast PC.

Editorial: Patrick "Mocalcium" rock Additional Reporting: Steve "Lelldorianx" Burke video Production: Andrew "ColossalCake" Coleman