The Core i9s are a quite a bit cheaper than the Xeon Ws:
https://ark.intel.com/products/series/125035/Intel-Xeon-Processor-W-Family vs
https://ark.intel.com/products/126695

I wouldn't want to trade ECC for 4 cores.

-Jeff

On Tue, Nov 7, 2017 at 3:51 PM, Sophana "Soap" Aik <s...@mozilla.com> wrote:
> Kris has touched on the many advantages of having a standard model. From
> what I am seeing with most people's use case scenario, only the GPU is what
> will determine what the machine is used for. IE: VR Research team may end up
> only needing a GPU upgrade.
>
> Fortunately the new W-Series Xeon's seem to be equal or better to the Core
> i9's but with ECC support. So there's no sacrifice to performance in single
> threaded or multi-threaded workloads.
>
> With all that said, we'll move forward with the evaluation machine and find
> out for sure in real world testing. :)
>
>
>
> On Tue, Nov 7, 2017 at 12:30 PM, Kris Maglione <kmagli...@mozilla.com>
> wrote:
>>
>> On Tue, Nov 07, 2017 at 03:07:55PM -0500, Jeff Muizelaar wrote:
>>>
>>> On Mon, Nov 6, 2017 at 1:32 PM, Sophana "Soap" Aik <s...@mozilla.com>
>>> wrote:
>>>>
>>>> Hi All,
>>>>
>>>> I'm in the middle of getting another evaluation machine with a 10-core
>>>> W-Series Xeon Processor (that is similar to the 7900X in terms of clock
>>>> speed and performance) but with ECC memory support.
>>>>
>>>> I'm trying to make sure this is a "one size fits all" machine as much as
>>>> possible.
>>>
>>>
>>> What's the advantage of having a "one size fits all" machine? I
>>> imagine there's quite a range of uses and preferences for these
>>> machines. e.g some people are going to be spending more time waiting
>>> for a single core and so would prefer a smaller core count and higher
>>> clock, other people want a machine that's as wide as possible. Some
>>> people would value performance over correctness and so would likely
>>> not want ECC. etc. I've heard a number of horror stories of people
>>> ending up with hardware that's not well suited to their tasks just
>>> because that was the only hardware on the list.
>>
>>
>> High core count Xeons will divert power from idle cores to increase the
>> clock speed of saturated cores during mostly single-threaded workloads.
>>
>> The advantage of a one-size-fits-all machine is that it means more of us
>> have the same hardware configuration, which means fewer of us running into
>> independent issues, more of us being able to share software configurations
>> that work well, easier purchasing and stocking of upgrades and accessories,
>> ... I own a personal high-end Xeon workstation, and if every developer at
>> the company had to go through the same teething and configuration troubles
>> that I did while breaking it in, we would not be in a good place.
>>
>> And I don't really want to get into the weeds on ECC again, but the
>> performance of load-reduced ECC is quite good, and the additional cost of
>> ECC is very low compared to the cost of developer time over the two years
>> that they're expected to use it.
>
>
>
>
> --
> moz://a
> Sophana "Soap" Aik
> IT Vendor Management Analyst
> IRC/Slack: soap
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