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WD_BLACK SN850X 8TB

Ranked #58 of 108 in Best internal NVMe SSDs, ranked on official maker specs. Here is every spec we scored, where it came from, and how it compares.

Affiliate disclosure: We earn a commission if you buy through links on this page, at no extra cost to you. It never affects our rankings, which come from the published scoring formula. As an Amazon Associate I earn from qualifying purchases. Learn more.

W

#58

WD_BLACK SN850X 8TB

Best for: Official 7,200 MB/s sequential read, 6,600 MB/s sequential write, 8 TB

4.2/10

What we like

Official maker page lists a sequential read speed of 7,200 MB/s.
Official maker page lists a sequential write speed of 6,600 MB/s.
Official maker page lists a capacity of 8 TB.
Official maker page lists endurance of 4,800 TB written.

Watch out for

Official figures are for the configuration shown on the official product page, not a test we ran.

Score breakdown

Official sequential read 50%

Official sequential write 50%

Official sequential read	7200 MB/s
Official sequential write	6600 MB/s
Official model number	WDS800T2X0E
Official product name	WD_BLACK SN850X 8TB
Official sequential read	7,200 MB/s
Official sequential write	6,600 MB/s
Official capacity	8 TB
Official endurance (TBW)	4,800 TB
Official interface	PCIe 4.0 x4
Official form factor	M.2 2280
Official warranty	5 years
Official notes	Official heatsink, color or enclosure variants with the same official scored specifications were consolidated onto this page: WDS800T2XHE (heatsink).
Price	Check price

Check price at Amazon

Specs source:

Official SanDisk product page

How it compares

Open the full comparison table

SanDisk Optimus GX Pro 8100 2TB

#1 · Official 14,900 MB/s sequential read, 14,000 MB/s sequential write, 2 TB

SanDisk Optimus GX Pro 8100 4TB

#2 · Official 14,900 MB/s sequential read, 14,000 MB/s sequential write, 4 TB

WD_BLACK SN8100 2TB

#3 · Official 14,900 MB/s sequential read, 14,000 MB/s sequential write, 2 TB

WD_BLACK SN8100 4TB

#4 · Official 14,900 MB/s sequential read, 14,000 MB/s sequential write, 4 TB

Crucial T710 1TB

#5 · Official 14,900 MB/s sequential read, 13,700 MB/s sequential write, 1 TB

Crucial T710 4TB

#6 · Official 14,500 MB/s sequential read, 13,800 MB/s sequential write, 4 TB

Samsung 9100 PRO 1TB

#7 · Official 14,800 MB/s sequential read, 13,400 MB/s sequential write, 1 TB

Samsung 9100 PRO 2TB

#8 · Official 14,800 MB/s sequential read, 13,400 MB/s sequential write, 2 TB

Samsung 9100 PRO 4TB

#9 · Official 14,800 MB/s sequential read, 13,400 MB/s sequential write, 4 TB

Samsung 9100 PRO 8TB

#10 · Official 14,800 MB/s sequential read, 13,400 MB/s sequential write, 8 TB

SanDisk NAS 800 1.92TB

#11 · Official 14,900 MB/s sequential read, 13,200 MB/s sequential write, 1.92 TB

SanDisk Optimus GX Pro 8100 8TB

#12 · Official 14,900 MB/s sequential read, 13,200 MB/s sequential write, 8 TB

WD_BLACK SN8100 8TB

#13 · Official 14,900 MB/s sequential read, 13,200 MB/s sequential write, 8 TB

SanDisk NAS 800 3.84TB

#14 · Official 14,900 MB/s sequential read, 13,100 MB/s sequential write, 3.84 TB

SanDisk NAS 800 7.68TB

#15 · Official 14,900 MB/s sequential read, 13,000 MB/s sequential write, 7.68 TB

Crucial T705 2TB

#16 · Official 14,500 MB/s sequential read, 12,700 MB/s sequential write, 2 TB

Crucial T705 4TB

#17 · Official 14,100 MB/s sequential read, 12,600 MB/s sequential write, 4 TB

SanDisk NAS 800 960GB

#18 · Official 14,900 MB/s sequential read, 11,000 MB/s sequential write, 960 GB

SanDisk Optimus GX Pro 8100 1TB

#19 · Official 14,900 MB/s sequential read, 11,000 MB/s sequential write, 1 TB

WD_BLACK SN8100 1TB

#20 · Official 14,900 MB/s sequential read, 11,000 MB/s sequential write, 1 TB

Crucial T700 2TB

#21 · Official 12,400 MB/s sequential read, 11,800 MB/s sequential write, 2 TB

Crucial T700 4TB

#22 · Official 12,400 MB/s sequential read, 11,800 MB/s sequential write, 4 TB

Crucial T705 1TB

#23 · Official 13,600 MB/s sequential read, 10,200 MB/s sequential write, 1 TB

Crucial T700 1TB

#24 · Official 11,700 MB/s sequential read, 9,500 MB/s sequential write, 1 TB

Crucial P510 1TB

#25 · Official 11,000 MB/s sequential read, 9,500 MB/s sequential write, 1 TB

Crucial P510 2TB

#26 · Official 10,000 MB/s sequential read, 8,700 MB/s sequential write, 2 TB

Crucial T500 2TB

#27 · Official 7,400 MB/s sequential read, 7,000 MB/s sequential write, 2 TB

Samsung 990 PRO 1TB

#28 · Official 7,450 MB/s sequential read, 6,900 MB/s sequential write, 1 TB

Samsung 990 PRO 2TB

#29 · Official 7,450 MB/s sequential read, 6,900 MB/s sequential write, 2 TB

Samsung 990 PRO 4TB

#30 · Official 7,450 MB/s sequential read, 6,900 MB/s sequential write, 4 TB

Crucial T500 1TB

#31 · Official 7,300 MB/s sequential read, 6,800 MB/s sequential write, 1 TB

SanDisk Optimus GX 7100 1TB

#32 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 1 TB

SanDisk Optimus GX 7100 2TB

#33 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 2 TB

SanDisk Optimus GX 7100M 1TB

#34 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 1 TB

SanDisk Optimus GX 7100M 2TB

#35 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 2 TB

SanDisk Optimus GX 7100X for ROG Xbox Ally X 2TB

#36 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 2 TB

SanDisk SN7100S 1.024TB

#37 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 1.024 TB

SanDisk SN7100S 2.048TB

#38 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 2.048 TB

WD_BLACK SN7100 1TB

#39 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 1 TB

WD_BLACK SN7100 2TB

#40 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 2 TB

WD_BLACK SN7100X for ROG Xbox Ally X 2TB

#41 · Official 7,250 MB/s sequential read, 6,900 MB/s sequential write, 2 TB

Crucial T500 4TB

#42 · Official 7,000 MB/s sequential read, 6,900 MB/s sequential write, 4 TB

SanDisk Optimus 5100 1TB

#43 · Official 7,100 MB/s sequential read, 6,700 MB/s sequential write, 1 TB

SanDisk Optimus 5100 2TB

#44 · Official 7,100 MB/s sequential read, 6,700 MB/s sequential write, 2 TB

SanDisk Optimus GX Pro 850P for PS5 2TB

#45 · Official 7,300 MB/s sequential read, 6,600 MB/s sequential write, 2 TB

SanDisk Optimus GX Pro 850P for PS5 4TB

#46 · Official 7,300 MB/s sequential read, 6,600 MB/s sequential write, 4 TB

SanDisk Optimus GX Pro 850P for PS5 8TB

#47 · Official 7,200 MB/s sequential read, 6,600 MB/s sequential write, 8 TB

SanDisk Optimus GX Pro 850X 2TB

#48 · Official 7,300 MB/s sequential read, 6,600 MB/s sequential write, 2 TB

SanDisk Optimus GX Pro 850X 4TB

#49 · Official 7,300 MB/s sequential read, 6,600 MB/s sequential write, 4 TB

SanDisk Optimus GX Pro 850X 8TB

#50 · Official 7,200 MB/s sequential read, 6,600 MB/s sequential write, 8 TB

WD Blue SN5100 1TB

#51 · Official 7,100 MB/s sequential read, 6,700 MB/s sequential write, 1 TB

WD Blue SN5100 2TB

#52 · Official 7,100 MB/s sequential read, 6,700 MB/s sequential write, 2 TB

WD_BLACK SN850P for PS5 2TB

#53 · Official 7,300 MB/s sequential read, 6,600 MB/s sequential write, 2 TB

WD_BLACK SN850P for PS5 4TB

#54 · Official 7,300 MB/s sequential read, 6,600 MB/s sequential write, 4 TB

WD_BLACK SN850P for PS5 8TB

#55 · Official 7,200 MB/s sequential read, 6,600 MB/s sequential write, 8 TB

WD_BLACK SN850X 2TB

#56 · Official 7,300 MB/s sequential read, 6,600 MB/s sequential write, 2 TB

WD_BLACK SN850X 4TB

#57 · Official 7,300 MB/s sequential read, 6,600 MB/s sequential write, 4 TB

Samsung 990 EVO Plus 2TB

#59 · Official 7,250 MB/s sequential read, 6,300 MB/s sequential write, 2 TB

Samsung 990 EVO Plus 4TB

#60 · Official 7,250 MB/s sequential read, 6,300 MB/s sequential write, 4 TB

SanDisk Optimus 5100 4TB

#61 · Official 6,900 MB/s sequential read, 6,700 MB/s sequential write, 4 TB

SanDisk Optimus GX 7100 4TB

#62 · Official 7,000 MB/s sequential read, 6,700 MB/s sequential write, 4 TB

SanDisk Optimus GX 7100X for ROG Xbox Ally X 4TB

#63 · Official 7,000 MB/s sequential read, 6,700 MB/s sequential write, 4 TB

SanDisk Optimus GX Pro 850P for PS5 1TB

#64 · Official 7,300 MB/s sequential read, 6,300 MB/s sequential write, 1 TB

SanDisk Optimus GX Pro 850X 1TB

#65 · Official 7,300 MB/s sequential read, 6,300 MB/s sequential write, 1 TB

WD Blue SN5100 4TB

#66 · Official 6,900 MB/s sequential read, 6,700 MB/s sequential write, 4 TB

WD_BLACK SN7100 4TB

#67 · Official 7,000 MB/s sequential read, 6,700 MB/s sequential write, 4 TB

WD_BLACK SN7100X for ROG Xbox Ally X 4TB

#68 · Official 7,000 MB/s sequential read, 6,700 MB/s sequential write, 4 TB

WD_BLACK SN850P for PS5 1TB

#69 · Official 7,300 MB/s sequential read, 6,300 MB/s sequential write, 1 TB

WD_BLACK SN850X 1TB

#70 · Official 7,300 MB/s sequential read, 6,300 MB/s sequential write, 1 TB

Samsung 990 EVO Plus 1TB

#71 · Official 7,150 MB/s sequential read, 6,300 MB/s sequential write, 1 TB

Crucial P310 1TB

#72 · Official 7,100 MB/s sequential read, 6,000 MB/s sequential write, 1 TB

Crucial P310 2TB

#73 · Official 7,100 MB/s sequential read, 6,000 MB/s sequential write, 2 TB

Crucial P310 4TB

#74 · Official 7,100 MB/s sequential read, 6,000 MB/s sequential write, 4 TB

SanDisk Optimus GX 7100 500GB

#75 · Official 6,800 MB/s sequential read, 5,800 MB/s sequential write, 500 GB

SanDisk SN7100S 512GB

#76 · Official 6,800 MB/s sequential read, 5,800 MB/s sequential write, 512 GB

WD_BLACK SN7100 500GB

#77 · Official 6,800 MB/s sequential read, 5,800 MB/s sequential write, 500 GB

Samsung 980 PRO 1TB

#78 · Official 7,000 MB/s sequential read, 5,000 MB/s sequential write, 1 TB

Samsung 980 PRO 2TB

#79 · Official 7,000 MB/s sequential read, 5,100 MB/s sequential write, 2 TB

SanDisk Optimus 5100 500GB

#80 · Official 6,600 MB/s sequential read, 5,600 MB/s sequential write, 500 GB

WD Blue SN5100 500GB

#81 · Official 6,600 MB/s sequential read, 5,600 MB/s sequential write, 500 GB

SanDisk SN7100S 256GB

#82 · Official 6,200 MB/s sequential read, 4,400 MB/s sequential write, 256 GB

WD Blue SN5000 4TB

#83 · Official 5,500 MB/s sequential read, 5,000 MB/s sequential write, 4 TB

WD Blue SN5000 1TB

#84 · Official 5,150 MB/s sequential read, 4,900 MB/s sequential write, 1 TB

WD Blue SN5000 2TB

#85 · Official 5,150 MB/s sequential read, 4,850 MB/s sequential write, 2 TB

WD_BLACK SN770M 1TB

#86 · Official 5,150 MB/s sequential read, 4,900 MB/s sequential write, 1 TB

WD_BLACK SN770M 2TB

#87 · Official 5,150 MB/s sequential read, 4,850 MB/s sequential write, 2 TB

Crucial P3 Plus 2TB

#88 · Official 5,000 MB/s sequential read, 4,200 MB/s sequential write, 2 TB

Samsung 990 EVO 1TB

#89 · Official 5,000 MB/s sequential read, 4,200 MB/s sequential write, 1 TB

Samsung 990 EVO 2TB

#90 · Official 5,000 MB/s sequential read, 4,200 MB/s sequential write, 2 TB

WD Green SN3000 1TB

#91 · Official 5,000 MB/s sequential read, 4,200 MB/s sequential write, 1 TB

WD Green SN3000 2TB

#92 · Official 5,000 MB/s sequential read, 4,200 MB/s sequential write, 2 TB

Crucial P3 Plus 4TB

#93 · Official 4,800 MB/s sequential read, 4,100 MB/s sequential write, 4 TB

WD Blue SN5000 500GB

#94 · Official 5,000 MB/s sequential read, 4,000 MB/s sequential write, 500 GB

WD Green SN3000 500GB

#95 · Official 5,000 MB/s sequential read, 4,100 MB/s sequential write, 500 GB

WD_BLACK SN770M 500GB

#96 · Official 5,000 MB/s sequential read, 4,000 MB/s sequential write, 500 GB

Crucial P3 Plus 1TB

#97 · Official 5,000 MB/s sequential read, 3,600 MB/s sequential write, 1 TB

Crucial P3 1TB

#98 · Official 3,500 MB/s sequential read, 3,000 MB/s sequential write, 1 TB

Crucial P3 2TB

#99 · Official 3,500 MB/s sequential read, 3,000 MB/s sequential write, 2 TB

Crucial P3 4TB

#100 · Official 3,500 MB/s sequential read, 3,000 MB/s sequential write, 4 TB

WD Green SN350 2TB

#101 · Official 3,200 MB/s sequential read, 3,200 MB/s sequential write, 2 TB

WD Red SN700 1TB

#102 · Official 3,430 MB/s sequential read, 3,000 MB/s sequential write, 1 TB

WD Red SN700 2TB

#103 · Official 3,400 MB/s sequential read, 2,900 MB/s sequential write, 2 TB

WD Red SN700 4TB

#104 · Official 3,400 MB/s sequential read, 3,100 MB/s sequential write, 4 TB

WD Red SN700 500GB

#105 · Official 3,430 MB/s sequential read, 2,600 MB/s sequential write, 500 GB

WD Red SN700 250GB

#106 · Official 3,100 MB/s sequential read, 1,600 MB/s sequential write, 250 GB

WD Green SN350 250GB

#107 · Official 2,400 MB/s sequential read, 1,500 MB/s sequential write, 250 GB

WD Green SN350 500GB

#108 · Official 2,400 MB/s sequential read, 1,500 MB/s sequential write, 500 GB