Workstation Build Thoughts - HP Z840

you don't need a quadro unless you need 10bit display output for a monitor. otherwise adding a gtx card will be much cheaper, something like the gtx 1060 6gb would typically be a good match to a 6 core cpu. adding in third party memory to hit 64gb is another way to cut costs. kingston has a memory finder tool on their website to help pick the exact kit for compatibility. you might be looking at the hp z840 to add another cpu later, or perhaps you already have dual cpu in mind, but its generally better to go with one cpu for performance. if you are looking at a single 6 core cpu for now, the hp z440 with an E5-1650v4 6core 3.6ghz should be much cheaper. the cpu can always be upgraded to a xeon with more cores later if needed too.

i'm not sure what cost you are getting on the hp system, but i imagine its between $6-7k with gtx card. that much money for a system with only 6 cpu cores is crazy. soon there will be basic off-the-shelf systems with amd 6-8 cpu's starting around $1k, and perhaps intel will offer 6 core off-the-shelf systems later. another option is to go with a system builder like puget systems or adk video, which can spec out a similar build with a gtx 1070 and 8 core cpu for around $5-5.6k or closer to $4k for a 6 core with gtx 1060 6gb. also, intel will be releasing new cpu's soon, so those custom build shop prices might drop another $400 or so for an 8 core build as intel is having to cut costs to compete with amd's new ryzen cpu's at much lower prices.