The ComparatorAppearance
Compare Silicon Power UD90 4TB and Western Digital Blue SN5000 4TB in the United States side by side across price, specifications, capability by use case and the price at which the answer changes.
Market snapshot Nov 9, 2026 · USD
Specifications, performance and current prices compared in United States · USD · prices checked through Nov 9, 2026
Silicon Power
Current comparison price
$580Value · Balanced40
from 2 offers at 2 retailers · checked Nov 9
Capability highlights · price excluded
Western Digital
Current comparison price
$491Value · Balanced53
from 2 offers at 2 retailers · checked Nov 9
Capability highlights · price excluded
Capabilityprice excluded
Scenarios won: Silicon Power UD90 4TB 0, Western Digital WD Blue SN5000 4TB 1, even 2. Western Digital WD Blue SN5000 4TB is ahead for Heavy Creative Work. View grades →
Valueunder Balanced
Western Digital WD Blue SN5000 4TB has the higher Value under these priorities (53 vs 40).
Pricecurrent market snapshot
Western Digital WD Blue SN5000 4TB costs less right now ($491 vs $580, 15% apart).
| Priority | Silicon Power UD90 4TB | Western Digital WD Blue SN5000 4TB | |
|---|---|---|---|
| 40 | 53 | ||
| 16 | 23 | ||
| 70 | 86 | ||
| 39 | 51 |
Pick a preset to compare under it: the whole page follows. Within 2 points counts as even.
Not tracked means our source data does not have the fact; it is never treated as absent. Inferred figures come from the reference model of the same chip.
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.
Silicon Power UD90 4TB
Current comparison price
$580 40
Silicon Power UD90 4TB matches the Value of Western Digital WD Blue SN5000 4TB (at $491) at $437 or less.
Western Digital WD Blue SN5000 4TB
Current comparison price
$491 53
Western Digital WD Blue SN5000 4TB keeps the higher Value up to $651 (with Silicon Power UD90 4TB at $580).
A crossover is a calculation under the active priorities and today's market frame, not a price forecast.
New offers we track in United States (USD), cheapest first, with the date each was checked. Amazon appears as a link only: its price is not shown and never enters Value.
Silicon Power UD90 4TB
Western Digital WD Blue SN5000 4TB
Affiliate links may earn us a commission. They never change the prices shown here, the ranking or Value.
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
| Silicon Power UD90 4TB | Western Digital WD Blue SN5000 4TB | |
|---|---|---|
| System Drive | A #86 | A #79 |
| Game & File Storage | S #23 | S #22 |
| Heavy Creative Work | B #112 | A #73 |
| Drive performance | 5,000 | 5,500 |
| Sequential read | 5,000 | 5,500 |
| Sequential write | 3,200 | 5,000 |
Facts true of every board a product groups; a range or "varies" marks a fact that differs between boards.
7 identical facts hidden
| Silicon Power UD90 4TB | Western Digital WD Blue SN5000 4TB | |
|---|---|---|
| Speed | ||
| Sequential read | 5,000 MB/s | 5,500 MB/s |
| Sequential write | 3,200 MB/s | 5,000 MB/s |
| Storage and endurance | ||
| NAND type | Not tracked | SanDisk BiCS8 TLC |
| DRAM cache | Not tracked | DRAM-less |
| Controller | Not tracked | SanDisk Custom |
| Product | ||
| Brand | Silicon Power | Western Digital |
Not tracked means the source data does not have this fact. It is not assumed to be absent.
Conditions drawn from the data above, not a universal recommendation. The better choice depends on which of these matter to you.
No measured advantage in this data. Decide on availability, platform fit or the offer you find.
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.
Under Balanced, Western Digital WD Blue SN5000 4TB has the higher Value (53 vs 40) in the market snapshot of Nov 9, 2026. Value changes with your priorities and with prices.
Under Balanced, with Western Digital WD Blue SN5000 4TB at its current price, Silicon Power UD90 4TB reaches equal Value at $437. It is a calculation, not a price forecast.
Scenarios won: Silicon Power UD90 4TB 0, Western Digital WD Blue SN5000 4TB 1, even 2. Western Digital WD Blue SN5000 4TB is ahead for Heavy Creative Work.
The offers section lists every new offer we track for both products in United States, with the date each price was checked. Open in Compare to add more products.