Which is better for gaming?

Both load games fast; the difference is small in practice. The T705 wins on paper with 14,500 MB/s reads, but most games barely use Gen4 bandwidth, so the SN850X 4TB's extra space matters more for a large game library.

Do I need a Gen5 slot for the T705?

Yes, to reach its rated 14,500 MB/s. In a Gen4 slot it runs at Gen4 speeds, so you pay for speed you cannot use.

The WD Black SN850X 4TB, rated 2,400 TBW against 700 TBW for the 1TB T705. Both carry five-year warranties.

Is the T705 worth the extra over a Gen4 drive?

It is not extra here: at $389.99 it costs less than the $799.99 SN850X 4TB. The catch is half the capacity and the need for a Gen5 slot.

Does the T705 fit a laptop?

It is M.2 2280, but the included heatsink adds height. Check clearance before installing it in a thin laptop.

Which should I pick for video editing?

The T705 for fast scratch-disk reads and writes, or the SN850X 4TB if you need to hold large project files on one drive.

WD Black SN850X 4TB NVMe SSD vs Crucial T705 2TB NVMe SSD

Buy the Crucial T705 2TB if you want the fastest drive for a Gen5 desktop and want to spend less: it was $389.99 at its lowest since November 3, versus $741.00 for the WD Black. Buy the WD Black SN850X 4TB if you need double the capacity, a proven Gen4 drive that works in almost any M.2 slot, and a 2,400 TBW rating. The WD Black's best new price is $799.99 at Newegg as of November 7, 2026, so the T705 costs roughly half as much for half the space.

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