The ComparatorAppearance
Specifications, performance and current prices compared in United States · USD · prices checked through Oct 17, 2026
Silicon Power
Current comparison price
$280Value 57 · Balanced
from 2 offers at 2 retailers · checked Oct 17
Capability highlights · price excluded
Western Digital
Current comparison price
$287Value 63 · Balanced
from 1 offer · checked Oct 14
Capability highlights · price excluded
Capabilityprice excluded
Silicon Power UD90 2TB leads in 0 scenarios, Western Digital Black SN770 2TB in 1, 2 even. Western Digital Black SN770 2TB is ahead for Heavy Creative Work. View grades →
Valueunder Balanced
Western Digital Black SN770 2TB has the higher Value under these priorities (63 vs 57).
Pricecurrent market snapshot
Silicon Power UD90 2TB costs less right now ($280 vs $287, 3% apart).
| Priority | Silicon Power UD90 2TB | Western Digital Black SN770 2TB | |
|---|---|---|---|
| 57 | 63 | ||
| 15 | 20 | ||
| 76 | 76 | even | |
| 11 | 15 |
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 2TB
Current comparison price
$280 Value 57
Silicon Power UD90 2TB matches the Value of Western Digital Black SN770 2TB (at $287) at $244 or less.
Western Digital Black SN770 2TB
Current comparison price
$287 Value 63
Western Digital Black SN770 2TB keeps the higher Value up to $329 (with Silicon Power UD90 2TB at $280).
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 2TB
Western Digital Black SN770 2TB
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 2TB | Western Digital Black SN770 2TB | |
|---|---|---|
| System Drive | A #89 | A #83 |
| Game & File Storage | A #68 | A #66 |
| Heavy Creative Work | B #115 | A #79 |
| Drive performance | 5,000 | 5,150 |
| Sequential read | 5,000 | 5,150 |
| Sequential write | 3,200 | 4,850 |
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 2TB | Western Digital Black SN770 2TB | |
|---|---|---|
| Speed | ||
| Sequential read | 5,000 MB/s | 5,150 MB/s |
| Sequential write | 3,200 MB/s | 4,850 MB/s |
| Storage and endurance | ||
| NAND type | Not tracked | SanDisk 112-layer TLC |
| DRAM cache | Not tracked | DRAM-less |
| Controller | Not tracked | SanDisk Proprietary |
| 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.
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 Black SN770 2TB has the higher Value (63 vs 57) in the market snapshot of Oct 17, 2026. Value changes with your priorities and with prices.
Under Balanced, with Western Digital Black SN770 2TB at its current price, Silicon Power UD90 2TB reaches equal Value at $244. It is a calculation, not a price forecast.
Silicon Power UD90 2TB leads in 0 scenarios, Western Digital Black SN770 2TB in 1, 2 even. Western Digital Black SN770 2TB 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.