<div dir="ltr">We may want to wait until general retail availability of Epyc (and reasonably-prices workstation boards) to get reliable ECC. Sigh. Good thing I'm not in a rush, tempting though Ryzen is.<div><br></div><div>And I just bought a house, so PC upgrades suddenly aren't as high on my priority list.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Nov 16, 2017 at 11:53 PM, Trevor Cordes <span dir="ltr"><<a href="mailto:trevor@tecnopolis.ca" target="_blank">trevor@tecnopolis.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 2017-11-16 Kevin McGregor wrote:<br>
> The question is, which (types of) applications have sucky performance<br>
> specifically because of this? It may be a perfectly reasonable design<br>
> choice for some/many use cases.<br>
<br>
</span>Possibly. Adam's article actually c&p'ed the ryzen paragraphs from<br>
other (game-centric) ryzen articles (or vice-versa?).<br>
<br>
However, none of the articles I read tell me what the upside is... they<br>
just list the downside (latency). I assume AMD chose bandwidth over<br>
latency, so one would hope the bw would be much higher on ryzen to<br>
compensate for latency. Then your app will dictate whether ryzen or<br>
xeon is better.<br>
<br>
As Adam said, one would hope AMD made this design decision on purpose,<br>
rather than as a mistake. As a mistake, think lack of barrel shifter<br>
on P4's. No one said chip designers are perfect... so I wouldn't be<br>
too surprised either way.<br>
<br>
I stopped caring about that "last tiny bit of performance" about 10<br>
years ago. If my next workstation is around 8X faster than my current<br>
one for my workload, then I don't really care if it is actually 7X or<br>
9X, as long as the price is semi-affordable. And I get ECC. And I get<br>
a x16/x16 slot for discrete graphics.<br>
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