E5-26xx (v3 / v4) ... vs. LGA3647 Silver CPUs ... is there any (much) of a difference?

[TrumanHW]

Anyone have definitive (comparative performance) rationale [i.e. inherent advantages] of the:
- LGA 3647 ... Silver series
-- vs --
- E5-26xx v3 / v4

The difference between the v3 & v4 appears relatively small:
- A .. core bump
- 10% faster memory
Which although good, isn't a quantum leap such that I regard them as different species.

It's hard to imagine that the LGA3647, with it's much larger footprint (presumably able to better cool it, pins allowing connectivity / bandwidth advantages ... is 'largely cosmetic' in difference; and is otherwise -- really the same product.

- Same PCI lanes
- RAM capacities
- RAM speed / type ...

It's just ..... very counterintuitive.

Thanks...

 

[Patrick]

What do you mean by "10% faster memory" and "same PCI lanes"?

Intel Xeon Silver 41xx has DDR4-2400 support as does much of the E5-2600 V4 series, but you get 6 channel versus 4 channel memory which means effectively 50% more memory bandwidth.

On the PCIe lanes, we went from 40x to 48x.

Lots of information on this on a site https://www.servethehome.com/intel-xeon-scalable-processor-family-skylake-sp-coverage-central/

 

[Patriot]

I would suggest going back through this sites articles regarding the scalable Xeons and how they differ architecturally.

You have a lot of reading to do...
https://www.servethehome.com/intel-xeon-scalable-processor-family-platform-level-overview/
https://www.servethehome.com/the-new-intel-mesh-interconnect-architecture-and-platform-implications/

How do all these changes impact the lowest end offerings? Not as much as the high end.
https://www.servethehome.com/intel-...eon-e5-2603-v3-v4-three-generations-compared/

 

[Evan]

New instructions like AVC512 (even if crippled in silver).

I can’t get excited by the current scalable processors... they are an evolution but generally except some special workloads not a huge leap.

 

[wildpig1234]

v3/v4 cpu prices are crazy right now.

 

[IamSpartacus]

v3/v4 cpu prices are crazy right now.

Are they? Maybe on the top end but I just picked up an E5-2680v3 for $275 and I'd say that's a solid value given the performance.

 

[wildpig1234]

I have 2686 and 2696 v3 qs as well as qhuz v4 es.. Those cpu are all well above now what i paid over a yr ago. the 2696 v3 is like around $1k now.. bought it back then for $650...... crazy....

 

[IamSpartacus]

I have 2686 and 2696 v3 qs as well as qhuz v4 es.. Those cpu are all well above now what i paid over a yr ago. the 2696 v3 is like around $1k now.. bought it back then for $650...... crazy....

That I did not know. My guess is it's because the Xeon Scalable line is not being heavily adopted and thus the supply of v3 and v4 chips are more scarce.

 

[Evan]

E5 still has some use cases where it makes more sense than scalable, kind of corner cases you can say relating to single pcie root usage but still I guess it keeps prices high especially as intel in general is short of supplying everybody what they want.

Also looking at say the current Cisco FX2 version on ACI switches as far as I know still running e5 cpu. Lots of network switching is always generation behind in general.