I would really like to be able to test one of these things before buying. I want to know how much faster my workloads will be when doing the following:
* C++ compiles times in VS2015
* Sony Vegas render to an AVI file using Lagarith
* Handbrake render AVI to MP4
* Output Canon Raw files using Canon DPP
* Resize JPG files using FastStone Photo Resizer
* Search NVMe drives using FileSearchEX
* Running VMWare Workstation guests and their applications (Exchange Server, OS installs, etc.)
18-core Xeon E5-2686 v4 = $450 (http://www.ebay.com/itm/172668300615)
18-core Xeon E5 2695 V4 ES = $610 (http://www.ebay.com/itm/272620269793)
20-core Xeon E5-2698 v4 ES = $745 (http://www.ebay.com/itm/282579817803)
22-core Xeon E5 2699 V4 ES = $920 (http://www.ebay.com/itm/201883329486)
24-core Xeon E7-8890 v4 ES = $999 (http://www.ebay.com/itm/352113502495)
There was an article on building a dual Xeon box using cheap second hand chips recently and I was seriously considering it until I saw the range and cost of dual socket boards.
In the end, I got a bought the boy a used Dell Precision T7500 for less than I would have paid for an equivalent case and power supply. Sure only six Xeon cores and 12 threads. But a system with RAM, a windows license, a small hard disk and 12GB of RAM was half the price of the cheapest Threadripper...including shipping.
From a systems perspective, there is a more robust pipeline of replacement parts for the used boxes relative to the latest retail Threadripper motherboards. More boxes means it is possible to stay up with a hardware failure (which is to say that scaling out instead of scaling up means a partial hardware failures versus total hardware failures).
There's no free lunch of course. All those 1100w power supplies are going to equate to higher operating costs. And if first cost is no object then four or five Threadripper boxes will outperform the older hardware. Likewise if having the latest and greatest is part of the problem being solved.
I'm sure a used Threadripper is cheaper than new as well...
23.11 compiles per day vs 15.6 for the 1700. 50% faster.