1800x -> 1900x why such a huge jump in TDP?

[Gothmoth]

why does the 1900x has a TDP of 180 watt?

i mean compared to the 1800x it looks like a very inefficient CPU.

i know that threadripper needs more power because of the design, memory controller etc.. but 180 watt for the 1900x still seems a bit odd, not?

is this because the second ccx has to be enabled and a 0/4 + 0/4 design needs so much more power?
or is the TDP for the 1900x just exaggerated?

 

[tinytomlogan]

Its still two seperate dies.

Its threadripper with cores disabled

 

[NeverBackDown]

It has a lot more things on die that cost power?

 

[Gothmoth]

i don´t see what could be on the die that could justify nearly twice the TDP.
i don´t say it isn´t so, just that for an 8 core design it does not make much sense.

i guess it IS just the truth that it´s an inefficient design for an 8 core.
compared to ryzen.
i mean who could deny that when you see that an 1800x has the same perfromance.

and 85 watt more only for quad channel memory and more pci lanes?
i don´t know but it seems a bit much.
the components for the additional PCI lanes and quad channel memory controller need nearly as much power as the 8 cores + memory controller, plus lanes of a ryzen 7 1800x?

two zeppelin dies with one CCX disabled on each seem to produce a lot of "overhead".

ok you need two die in amd´s design for quad channel memory and co.. but nevertheless, compared to ryzen CPU performance it´s inefficient.

 

[NeverBackDown]

No idea what you are on about.
They are using 2 dies. Therefore you need to power both of them.

You have a much more complicated SoC design.
You have much more complicated Memory Design.

Those alone warrant a large increase in power consumption. It's not a big ass CPU with a large socket with a large power consumption just because. There are reasons.

Besides, in practice the power consumption is lower. You seem to confuse power consumption and TDP. They do not mean the same thing.
TDP is just the "typical design power" which is: the maximum amount of heat generated by a computer chip or component (often the CPU or GPU) that the cooling system in a computer is designed to dissipate under any workload. It simply refers to heat. And considering how hot the 12/16 core TR cpus can get, it makes sense for AMD to give the same measurement to ensure it's cooled properly.

 

[WYP]

TBH TDP listings are pretty meaningless, the 1900X will consume more power due to its dual die config and extra powered features but it won't be as high as the 12-core and 16-core variants.

It is like comparing the R7 1800X and the R5 1600X, both have a 95W TDP but both CPUs have very different power consumptions characteristics.

 

[NeverBackDown]

TBH TDP listings are pretty meaningless, the 1900X will consume more power due to its dual die config and extra powered features but it won't be as high as the 12-core and 16-core variants.

It is like comparing the R7 1800X and the R5 1600X, both have a 95W TDP but both CPUs have very different power consumptions characteristics.

Well TDP is just referring to the heat output.
That's why it's a meaningless measurement for power consumption