Will this drive fit as a second m.2 drive in the MSI Pulse 15 B13VFK?

It will fit in any NVMe slot that accepts a 4TB 2280 NVMe. Ask MSI

Will this drive work at all in a laptop which does not have a heat sink?

The stupidity of these questions never ceases to amaze me. NVME drives are intended to run at a high operating temperature and most don't have heatsinks. If your laptop already has an NVME drive it will be fine. If it doesn't use a hammer and chisel to adapt it.

Yes, these types of SSD have Dram.

Does it use NVMe protocol 1.4 or 2.0?

The device uses the NVMe protocol.

What heatsink would work best with the 4TB version?

Many motherboards already come with a basic thermal strip on the bottom of the parts you remove to install an M.2.

Will it also work with PCIe 3?

Yes, new PCIe standards are designed to be backwards compatible with older standards. You can use any PCIe 4 or 5 card in a PCIe 3 slot

Does this support or is it compatible with the upcoming directstorage api?

according to the datasheet (available on western digitals website) it is direct storage compatible.

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WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - WDS400T2X0E

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Options: 4TB SN850X w/o Heatsink

8TB SN850X w/ Heatsink
8TB SN850X w/o Heatsink
4TB SN850X w/ Heatsink
4TB SN850X w/o Heatsink
2TB SN850X w/ Heatsink
2TB SN850X w/o Heatsink
1TB SN850X w/ Heatsink
1TB SN850X w/o Heatsink

TRANSFORM YOUR PC. Get top-tier performance and ridiculously short load times for your gaming PC or workstation with insane speeds up to 7,300 MB/s (2)
MORE ROOM, MORE GAMES. Capacities up to 8TB (1) built with Western Digital TLC 3D NAND, means you get to download more games — and stop deleting your favorites.
HEATSINK FOR THE WIN. All capacities have an optional heatsink version to help maintain peak performance through your most intense gaming sessions.
DO MORE WITH DASHBOARD. The downloadable WD_BLACK Dashboard (Windows only) monitors your drive’s health, lets you customize your RGB lighting (heatsink versions only), and can automatically detect games to turn on Game Mode 2.0.
FUTURE-FORWARD FEATURES. The WD_BLACK SN850X boasts a powerful suite of features, including Predictive Loading, Overhead Balancing, and Adaptive Thermal Management (ATM).

Overview

Specs

Reviews (1,156)

Model
Brand	Western Digital
Series	BLACK SN850X NVMe
Model	WDS400T2X0E
Device Type	Internal Solid State Drive (SSD)
Used For	Consumer

Details
Form Factor	M.2 2280
Capacity	4TB
Memory Components	3D NAND TLC
Interface	PCI-Express 4.0 x4
Protocol	NVMe

Performance
Max Sequential Read	Up to 7300 MBps
Max Sequential Write	Up to 6600 MBps
4KB Random Read	Up to 1,200,000 IOPS
4KB Random Write	Up to 1,100,000 IOPS
Terabytes Written (TBW)	2400TB
MTTF	1.75M Hours
HeatSink	without HeatSink

Features
Features	Get the Ultimate Gaming Edge Insane speeds up to 7,300 MB/s deliver top-tier performance with ridiculously short load times for the elite gaming experience you've been waiting for. Soup Up Your Rig Extremely low latency loads graphics fast with minimal stutter and lagging for an incredibly smooth, satisfying gaming experience. More Room for More Games Today's A-list titles can take up 200GB or more of storage. A range of capacities from 1TB to 4TB means you get to keep more games at the ready and get into the action fast. Heatsink for the Win The WD_BLACK SN850X NVMe SSD 1TB and 2TB drives have an optional heatsink version that not only looks awesome but also helps your rig maintain peak performance through the most intense gaming sessions. Game Mode 2.0 The latest version of Game Mode serves up even more PC performance-boosting features like load prediction to ready game assets for fast in-game loading. Near-Max PCIe Gen43 Speeds The WD_BLACK SN850X NVMe SSD delivers output approaching the limits of the PCIe Gen4 interface to help you get ultra-fast performance out of your storage and system components.

Environmental
Operating Temperature	0°C ~ +85°C
Storage Temperature	-40°C ~ +85°C
Max Shock Resistance	1,500G @0.5 ms half sine
Max Vibration Resistance	Operating Vibration: 5 gRMS, 10-2000 Hz, 3 axes Non-operating Vibration: 4.9 gRMS, 7-800 Hz, 3 axes

Dimensions & Weight
Height	2.38mm
Width	22.00mm
Depth	80.00mm
Weight	7.50g

Additional Information
First Listed on Newegg	August 05, 2022

Warranty & Returns

Warranty, Returns, And Additional Information

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Warranty Notice:
This product does not include manufacturer warranty when purchased or used outside of its designated sales region. By purchasing internationally, you acknowledge that warranty support from the manufacturer will not be available.

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WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - WDS400T2X0E

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Manufacturer Contact Info

Item#: N82E16820250244

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WD_BLACK 4TB SN850X NVMe Internal Gaming SSD Solid State Drive - Gen4 PCIe, M.2 2280, Up to 7,300 MB/s - WDS400T2X0E

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Customer Reviews of the SanDisk WDS400T2X0E

Warranty & Returns

Warranty, Returns, And Additional Information

Return Policies*

Manufacturer Contact Info