850 evo is backed by 5-year warranty, sandisk ultra 3d has 3 years.

i have an asrock z97 extreme6, and it works fine with pcie ssds as boot drive. instead of using m.2 slot, i use pcie slot.

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about optane-based consumer ssds, there are a number of advantages over flash-based ssds that need to be highlighted:

1. high through-puts for low queue depths (qd-1 to 4);
2. no slow-down even if it's full (no need op to achieve performance consistency);
3. high endurance (about 6 times higher);
4. no need to get higher capacity to get higher performance;
5. no need trim command;
6. no need secure erase to restore performance.

intel 900p is still the first iteration of product release. it will definitely become better just like previous development cycles of flash-based ssds.

however, like performance nvme ssds, not many can make full use of it. looking at its current price, it's still better to get flash-based ssds.