You're no judge on what has a pretty low price; you have a Macbook Pro Retina!
High frequency memory (~1800MHz) can be reasonably expensive, so if you'll use this rig for nothing that wants the extra, don't bother buying too much. Also getting high frequency memory will give you only a ~2.5%-7.5% speed boost, and only really when EFB copies to RAM is on, so it's cheaper to get low(ish) frequency RAM, and if your rig isn't fast enough, just take the CPU 100-200MHz higher.
High frequency memory (~1800MHz) can be reasonably expensive, so if you'll use this rig for nothing that wants the extra, don't bother buying too much. Also getting high frequency memory will give you only a ~2.5%-7.5% speed boost, and only really when EFB copies to RAM is on, so it's cheaper to get low(ish) frequency RAM, and if your rig isn't fast enough, just take the CPU 100-200MHz higher.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56