WD Black SN850X

Pros

• Top-tier Gen4 performance suitable for high-end gaming and OS boot drives.
• Includes DRAM cache, which helps boost load speeds compared to DRAM-less alternatives.
• PS5 compatible, with many users recommending the version with the integrated heatsink.
• Often viewed as a better value alternative to Samsung's flagship Pro series.
• Utilizes reliable TLC flash memory.

Cons

• Reports of the drive 'disappearing' or disconnecting during high-stress gaming sessions, requiring a full power cycle to rediscover.
• Significant price volatility, with some users noting recent price increases or stock issues.
• Occasional reports of extreme speed throttling (averaging 12Kbps) in specific gaming scenarios despite healthy drive status.
• Potential BIOS access issues reported by some users after installation.

Caveats

• Performance will be limited by older hardware; for example, Z97 motherboards will not reach advertised speeds due to PCIe 2.0 limitations.
• The heatsink version is often preferred if the price is identical, but ensure it fits your motherboard's clearance.
• Market availability is mixed, with some reports suggesting the drive may be facing discontinuation or replacement.

Best for

• High-end PC gaming builds requiring a fast primary boot drive.
• PlayStation 5 storage expansion.
• Users seeking high-performance TLC storage with a DRAM cache.

Avoid if

• You are using an older motherboard that cannot support Gen4 speeds, making the premium cost unnecessary.
• The current market price has spiked significantly above competitors like the Crucial T500 or Lexar NM620.
• You require a drive with a proven track record of zero 'disappearing' bugs in high-stress environments.