Which is better for gaming?

The WD_BLACK SN850X. Its PCIe 4.0 interface and Game Mode 2.0 cut load times far more than the SATA-based 870 EVO can.

Will the WD_BLACK fit my laptop?

Only if it has an M.2 2280 PCIe slot. The 870 EVO fits any 2.5-inch SATA bay, which older laptops usually have.

Is the WD_BLACK worth the extra money?

If your board supports PCIe 4.0, yes: about $160 more buys roughly 13x the read speed and double the capacity. On a SATA-only machine it will not fit.

Both are rated for years of normal use. The 870 EVO carries a 5-year warranty; the SN850X carries a 5-year limited warranty, and its 1 TB capacity spreads writes over more cells.

Can I use the 870 EVO as a boot drive?

Yes. It boots Windows or Linux from any SATA port, just slower than an NVMe drive.

Does the SN850X need a heatsink?

Not for normal desktop use. The optional heatsink on the 1 TB and 2 TB models helps in tight cases or sustained heavy writes.

Samsung 870 EVO 500 GB SSD vs WD_BLACK SN850X NVMe SSD 1TB

Buy the WD_BLACK SN850X 1TB if your machine has an M.2 NVMe slot and you want the fastest drive here: up to 7,300 MB/s read versus 560 MB/s on the Samsung. Buy the Samsung 870 EVO 500GB if you only have a 2.5-inch SATA bay, or you want to spend about $160 less. Latest prices: $99.00 at IT Systems Inc for the Samsung as of November 6, 2026, and $258.95 at Amazon for the WD_BLACK as of the same date. The WD_BLACK has traded between $239.99 and $258.95 since November 2, 2026, so it is near its recent high.

Today the Samsung 870 EVO 500 GB SSD costs $159.95 less at its best price.

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