RouterOS x86 PCI-E for Maximum performance and stability

What is your x86 hardware where you reach maximum bandwidth and stability at the same time with more than 200Mbit/sec and more than 30,000pps: motherboard model, how many cpus at multi-cpu=no and which Ethernet cards: PCI-E Marvel or PCI-E Intel ?

We are considering to buy 10G Intel Cards for BGP purpose running routerOS 3.22 but we have stability issue under high load pps and high bandwidth with Marvel PCI-E from Planet.

Any ultra stable PCI-E recommendations from experienced users?