Would a new iMAC be able to upsample to DSD512 and is the graphic card good enough for CUDA (does that program work for MAC?)
4.2GHz quad-core 7th-generation Intel Core i7 processor, Turbo Boost up to 4.5GHz
32GB 2400MHz DDR4
2TB Fusion Drive
As you can see this is my first step into the world of serious DSD upsampling!
DSD 512 upsampling is a bit of the chicken and the egg. It depends on which filters you want to engage. Since you mention CUDA, I am assuming you are going to be using HQPlayer. Are you going to be using Roon and HQPlayer on the same machine? If so, then you need to plan for the resources to run both at once.
Also, CUDA is not a program that is run on any graphics card. CUDA is a processing language/module built into NVidia graphics cards. I do not believe that there has been an iMac with an Nvidia card made since 2013? Either way, any internal graphics card is never going to be as good as a real discrete NVidia card for compute processing.
Other points, that memory is more than enough, I would not use a Fusion Drive, a real SSD is the way to go. The quad core CPU depends upon again which filters you want to engage. And finally, Mac OS and DSD512 are not friends. If you use a MAC then you will have to use a different endpoint to feed the DAC and the Linux endpoints work on an individual DAC basis.
IMHO, high end DSD upsampling is squarely in the realm of a DIY Windows computer. The highest processing non - 2s filters need a spectacular amount of processing power: See this post from the author of HQPlayer (and I’d suggest you read the whole thread actually):
Thanks for this very helpful reply. I guess I will have to buy a pc then to get to the DSD 512 upsampling. I love HQ player and plan to buy an OPPO 205, which can receive DSD512 to its DAC. The question which computer or server to buy. My budget is probably less than 1200 dollars/1000 Euro…So if there are any proposals I am all ears…