I'm thinking about new build PC for BI and some light office work but maybe later it'll be dedicated for BI only. Currently I use only few cameras and testing with QVR Pro on Qnap. But I don't like this software. Planning 8-12 4Mpx and 4K cameras with total 40-80Mpx and 15fps rate is 600-1200MP/s. I expect some time after I play with this setup I'll set fps for most of cameras much lower and save a lot of bandwidth. All cameras I have already are H.265+ capable and I plan to buy only H.265+. CPU i9-9900 is fastest CPU with reasonable price and quite futureproof. Best whole PC price to passmark ratio if I want fast machine. Im not sure is it wise to go with top CPU but cost of buying lower CPU and losing money in resale then buying better CPU seems to me as waste of time and not saving any significant money. In the past I never upgraded CPU in my PC's. RAM 2x8GB DDR4-2666 should be enough. Motherboard will have 4 slots just in case. System disc SSD 500GB Samsung 860 Evo which I already have or 500GB Samsung 870 NVMe for a little more price. Should I use NVMe? Any visible increase of speed during playing recordings? What about size? 500GB too much or OK? Storage discs 3-5 3TB HGST enterprise HDDs in RAID5. It's cheapest price for TB. Not sure how many disc to add at the begining and is it possible to add another disc to RAID5 in Windows 10? I have disc already. Motherboard I don't know what to choose? Maybe MSI MAG Z390 for about 150euro or something more expensive like ASUS Aorus? But these are probably gaming motherboards and no need for all the fancy features. Motherboard must be RAID5 capable and have gigabit LAN and Z390 chipset. What do you think? PS I have i5-4570 HP Elitedesk which I can use for BI for a while if it's possible to just move BI and recordings from one computer to the other saving hassle with configuration and without losing data. It would be wise to use it as long as possible.