Intel Optane 905P Series 960GB (SSDPE21D960GAM3) vs Samsung 2TB 980 Pro as boot drive on windows 10?

[LiKenun]

@jared5

M.2_1 Source (From CPU) supports up to PCIe 4.0 x4

Optane goes here.

@jared5

since the optane is pcie 3 x4, does it make more sense to put it on one of my chipset m.2 slots? so i can give the 980 pro the full pcie 4 x4 bandwidth from the cpu? Or does the added latency of the chipset negate the whole point of picking the optane as a boot drive?

You are right on the money. When I benchmarked the 905P (380GB M.2 model) using AIDA64, putting the device on chipset-connected PCIe slots decreased random 4K read performance by about 8%.

c.f.: Help selecting interface for optane - #2 by LiKenun

@LiKenun

My CPU-connected PCIe slots are 5.0, and my chipset-connected PCIe slots are 4.0. All the devices (except for the SAMSUNG 780 QVO) are PCIe 3.0.

@jared5

also what does pcie 4 x4 / sata mode mean?

It means you can connect either an NVMe M.2 stick or an SATA M.2 stick to it.