Hi, I'm currently using Raid 0 with 2 hard drives and in Intel RST app, I get the option to choose different types of cache:
1. Write Back
2. Write Through
3. Read Only
4. No cache

So here are my questions:
1. Where is this cache stored?
2. Is the any way to enable write only cache? (in the help page it say Write Back and Write Through includes read cache).
3. When I disable write cache buffer flushing, does it disable buffer flushing on the RAID cache or the drives' cache?
4. Why does using the RAID array (writing at ~250 MB/s) cause one CPU Core to max out its usage (by a process "System")?
5. Why does it cause in game stutters, or ~100 ms freezes when the game loads textures?

Specs:
Intel i7 9700K
Asus H370-F
2x Western Digital Blue 1 TB (CMR)
Intel RST 17.5.0.1017 (Windows)
Intel RST 17.1.0.XXXX (BIOS)