Samsung 990 Pro 4TB
Samsung
Current comparison price
CAD 1,500Value · Balanced55
from 3 offers at 2 retailers · checked Oct 29
Capability highlights · price excluded
- S System Drive
- S Game & File Storage
- S Heavy Creative Work
Samsung 990 Pro 4TB vs Western Digital Black SN850X 4TB
Compare Samsung 990 Pro 4TB and Western Digital Black SN850X 4TB in Canada side by side across price, specifications, capability by use case and the price at which the answer changes.
Market snapshot Oct 29, 2026 · CAD
Specifications, performance and current prices compared in Canada · CAD · prices checked through Oct 29, 2026
Western Digital WD_Black SN850X 4TB
Western Digital
Current comparison price
CAD 900Value · Balanced77
from 3 offers at 2 retailers · checked Oct 29
Capability highlights · price excluded
- S System Drive
- S Game & File Storage
- S Heavy Creative Work
Key differences at a glance
Capabilityprice excluded
Same grade in all 3 scenarios. View grades →
Valueunder Balanced
Western Digital WD_Black SN850X 4TB has the higher Value under these priorities (77 vs 55).
Pricecurrent market snapshot
Western Digital WD_Black SN850X 4TB costs less right now (CAD 900 vs CAD 1,500, 40% apart).
How priorities change the comparison Presets with the higher Value: Samsung 990 Pro 4TB 0 · Western Digital WD_Black SN850X 4TB 4 · even 0
| Priority | Samsung 990 Pro 4TB | Western Digital WD_Black SN850X 4TB | |
|---|---|---|---|
| 55 | 77 | ||
| 27 | 33 | ||
| 58 | 80 | ||
| 23 | 30 |
Pick a preset to compare under it: the whole page follows. Within 2 points counts as even.
Price difference and break-even price
Under Balanced, each product holds or loses the higher Value at one price, with the other held at its current price. Enter the prices you were actually offered to see the answer for your deal.
Samsung 990 Pro 4TB
Current comparison price
CAD 1,500 55
Samsung 990 Pro 4TB matches the Value of Western Digital WD_Black SN850X 4TB (at CAD 900) at CAD 924 or less.
Western Digital WD_Black SN850X 4TB
Current comparison price
CAD 900 77
Western Digital WD_Black SN850X 4TB keeps the higher Value up to CAD 1,461 (with Samsung 990 Pro 4TB at CAD 1,500).
A crossover is a calculation under the active priorities and today's market frame, not a price forecast.
Price comparison: current offers
New offers we track in Canada (CAD), cheapest first, with the date each was checked. Amazon appears as a link only: its price is not shown and never enters Value.
Samsung 990 Pro 4TB
- CAD 1,500Best priceSamsung 990 Pro 4TBNewegg · checked · Affiliate linkGo to offer →
- CAD 1,555Samsung 990 Pro 4TB (Heatsink)Newegg · checked · Affiliate linkGo to offer →
- Check on AmazonSamsung 990 Pro 4TB (Heatsink)Amazon · checked Go to offer →
Western Digital WD_Black SN850X 4TB
- CAD 900Best priceWestern Digital WD_Black SN850X 4TBNewegg · checked · Affiliate linkGo to offer →
- Check on AmazonWestern Digital WD_Black SN850X 4TBAmazon · checked Go to offer →
- CAD 980Western Digital WD_Black SN850X 4TB (Heatsink)Newegg · checked · Affiliate linkGo to offer →
Affiliate links may earn us a commission. They never change the prices shown here, the ranking or Value.
Performance and key differences
What each product can do for a job, graded S to F with price left out, and the measured indexes behind it.
View full tier list and performance rankings
| Samsung 990 Pro 4TB | Western Digital WD_Black SN850X 4TB | |
|---|---|---|
| System Drive | S #12 | S #26 |
| Game & File Storage | S #6 | S #9 |
| Heavy Creative Work | S #16 | S #29 |
| Drive performance | 7,450 | 7,300 |
| Sequential read | 7,450 | 7,300 |
| Sequential write | 6,900 | 6,600 |
Where each one leads
- Higher sequential read
- Lower current price · Higher Value with these priorities
Specifications compared
Facts true of every board a product groups; a range or "varies" marks a fact that differs between boards.
7 identical facts hidden
| Samsung 990 Pro 4TB | Western Digital WD_Black SN850X 4TB | |
|---|---|---|
| Speed | ||
| Sequential read | 7,450 MB/s | 7,300 MB/s |
| Sequential write | 6,900 MB/s | 6,600 MB/s |
| Storage and endurance | ||
| NAND type | Samsung TLC V-NAND | SanDisk 112-layer TLC |
| DRAM cache | 4GB, 4GB LPDDR4 (varies by board) | 4GB DDR4 |
| Controller | Samsung Pascal (8nm) | WD Proprietary |
| Product | ||
| Brand | Samsung | Western Digital |
Not tracked means the source data does not have this fact. It is not assumed to be absent.
Which one to choose: where each wins
Conditions drawn from the data above, not a universal recommendation. The better choice depends on which of these matter to you.
Samsung 990 Pro 4TB fits better when…
- Drive performance matters: higher index
- Sequential read matters: higher index
- Sequential write matters: higher index
- Sequential read matters: 7,450 MB/s vs 7,300 MB/s
- Sequential write matters: 6,900 MB/s vs 6,600 MB/s
Western Digital WD_Black SN850X 4TB fits better when…
- your priorities are Balanced: higher Value
- the budget decides: 40% lower current price
Nearby market alternative
Worth considering instead
Samsung 9100 PRO 2TB — same S-tier capability for System Drive, about CAD 151 cheaper · Value 92.
Neither of the two above is the only answer — this one clears the same bar for less. ⇄ Compare all three
Questions and methodology
Which one is better, Samsung 990 Pro 4TB or Western Digital Black SN850X 4TB?
It depends on the question. For capability (price left out) see the grades by use case; for how good the current price is for what you get, see Value under your priorities; and for the cheapest option today, see current prices. This page keeps the three apart and does not name one overall winner.
Which has the higher Value right now?
Under Balanced, Western Digital WD_Black SN850X 4TB has the higher Value (77 vs 55) in the market snapshot of Oct 29, 2026. Value changes with your priorities and with prices.
At what price does the answer change?
Under Balanced, with Western Digital WD_Black SN850X 4TB at its current price, Samsung 990 Pro 4TB reaches equal Value at CAD 924. It is a calculation, not a price forecast.
Which one is more capable, ignoring price?
Same grade in all 3 scenarios.
Where can I compare current offers?
The offers section lists every new offer we track for both products in Canada, with the date each price was checked. Open in Compare to add more products.