Intel 8 Series Not Compatible With Broadwell, Bi-Directional Backward Compatibility Issues

/ 5 years ago


According to a VR-Zone report Haswell and Broadwell could use significantly different electrical arrangements on the CPU pin contacts . What this basically means is that there will be bi-directional backward compatibility issues with Haswell processors. Haswell CPUs may not work in Intel 9 Series motherboards (Z97/H91/B95…etc) and Broadwell CPUs may not work in Intel 8 Series (Z87/H81/B85…etc) motherboards. The reason for this is explained by VR-Zone as:

“The most notable changes are in the V_PROC_IO connection, as it requires a 1.05V power source, VCCST, because of a new type of power supply required, and to THRMTRIP because of a slightly different chip topology.”


What this means is that only motherboards which support the Haswell “refresh” chips will support Broadwell CPUs. We are currently on the Haswell generation of CPUs, there will be a new refreshed generation of CPUs based on Haswell architecture shrinking down from the 22nm process to the 14nm process and then there will be Broadwell which will use the 14nm process but use a redesigned architecture. If VR-Zone are correct then all three CPU generations will share the LGA 1150 socket but only Haswell Refresh and Broadwell CPUs will work together on their respective motherboards and the current Haswell generation will only work on current Haswell motherboards.

VR-Zone’s sources also state that there is mixed information on whether Broadwell has DDR4 support or not. It is confirmed that the Intel 9 Series chipset has SATA Express support.

Images courtesy of VR-Zone

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6 Responses to “Intel 8 Series Not Compatible With Broadwell, Bi-Directional Backward Compatibility Issues”
  1. Matthew Humpherson says:

    I smell Intel money whoring through repeated motherboard purchases. AMD are much better in that respect they have kept the same sockets for ages.

  2. Bansaku says:

    FFS Intel, please stop! First the LGA1556, now this?!?! I can pick up an 8-core AMD FX AM3+ cpu and slap it in a 5 year old MB and all that is needed is a BIOS update. This is not innovation, it’s your engineers being lazy.

  3. 00blahblahblah00 says:

    So I guess this was completely false info. I wonder how many people upgraded from a Z87 to a Z97 because they heard this. The Haswell “refresh” is not 14nm, as it turns out, just a higher clocked 22nm chip. And “old” Haswells work fine in the new 9-series boards. The only thing we aren’t clear on yet is if the 8-series boards will support Broadwell. Considering that the only differences between a Z87 and Z97 is the new M.2 interface, I don’t see why not. Same socket, same pin-out, same everything almost except slightly better overclocking performance. These were just scare tactic “rumors” to get people to panic and buy a 9-series board out of fear that they would be forever stuck in Haswell hell. Unless Intel and all the vendors refuse to let you use a Broadwell CPU on an 8-series board by omitting Broadwell CPUs on all future BIOS updates (which would be sort of evil), my guess it will work with a simple BIOS update.

  4. Alec Bakker (Flex) says:

    What this means is that only motherboards which support the Haswell “refresh” chips will support Broadwell CPUs.
    my hasswel refresh works fine in my z87 mobo, so broadwell will also

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