We get a fair number of questions about Threadrippers as they relate to mining Waltonchain. There are a few of us that have run 1950x rigs on the WTC beta. I am going to consolidate the most common answers here over time. Feel free to ask if you don't yet see an answer for what you are looking.
Latest testing results
Why might someone want a Threadripper to mine Walton?
Why wouldn't someone want a Threadripper to mine Walton?
Who cares about expense if you believe WTC will grow in value? Even if the CPU phase is only a couple months, isn't it worth it anyway?
Maybe. Maybe not if:
So... why did you get one, macktastick? It's sounding... not smart
If you have a use for a threadripper machine after the Waltonchain CPU phase ends, it may be a great option for you to consider now. I plan to use mine for some of my PC needs with work. Maybe you are also looking to make a PC upgrade anyway.
If you don't mind:
Then... keep going! Threadrippers are pretty fun. :)
Just what kind of hash rates are we talking about?
The testing results from my build should give you an idea of what the 1950x can do with the threadcap of version 1.3 of the miner still in place.
As /u/katio1000 first suggested, we're seeing about 10K hash rate per thread across the Ryzen 7 line. The Waltonchain team recently said the threadcap will come off, so with 32 threads we're expecting the 1950x will do close to ~300K uncapped (I usually leave 1-2 free).
Bear in mind, this same rate is achievable with multiple, less-capable CPU rigs. So even if you're convinced you want 300K hash rate for your node, the 1950x still might not be the best way to do it. Everyone's situation is a little different. You may place cost at a premium (then strongly consider multiple rigs). You may be more interested in saving space (the 1950x might be just right for you). You may be more worried about GPU mining. Etc.
If I could do my build over again, I think I would go with the ASRock X399 Taichi instead. To be clear, I have had no problems with the ASRock - Fatal1ty, I'm just not sure now what features it has to justify a higher price. Why the ASRocks? They had slightly better reviews online when I got mine. Most of the motherboards had surprisingly mixed reviews, but I've been told it was because of launch issues that have since been fixed (?). Again, no problems so far with mine.
Tip: check the number of PCIe slots and M.2 slots. Those are the number of GPUs you can support natively or via adapter (respectively).
How much does RAM matter?
First, must be DDR4.
Second, must be high speed to get the most out of the TR. The consensus around the Waltonchain slack seems to be 3000-3200MHz is best and that you should let the lowest latency you can find break any ties between those speeds. For example, 3000 MHz, c=14 is great. 3200MHz, c=14 is better. 3200MHz, c=18 is bad (lower the 'c', latency, the better). Speeds over 3200MHz won't show appreciable returns.
Finally, you will want 4 sticks you can run in quad channel. Any rig we've tested in dual channel had noticeably lower hash rates. Should not matter if they are 4GB or 8 GB sticks or... etc. (I've personally only tested the 4x8 in my parts list above... although also as a 2x8 and, yeah, it was slower).