I am about to change my old PC for a new one. I wanted to ask you guys for advice on how to choose parts correctly with Houdini in mind. Is it better to go with dual Xeon build or one strong i7? As far as my research goes I found out that i7 can go with 128GB RAM that is pretty expensive in comparaison to the RAM one can use with Xeons (and also I was told that the speed of RAM has very little influence on performance). How about graphic cards? I have heard that they will soon introduce Redshift for Houdini, but do any of you happen to know whether Redshift mats will be as keen to edit as Mantra ones? I already have 2 SSDs and 2 HDD which I will use in the new build. I am working in Maya and Substance Painter/Designer alongside.
That's oversimplifying things a bit. I would go for something like this build which is well suited for applications that scale well to many processor cores for most tasks (like Houdini) and provides big bang for the buck in terms of rendering performance.
That would get you 128GB of memory, 20 processor cores at 2.2GHz (turbo of 3.1GHz), 512GB SSD, and a GTX 970 GPU which you could swap out for whatever in the build if you want more GPU bang. It comes to around $3,300 but might be a little more outside of the United States. If you plan to use Windows add another $200 or so for the license.