Retailer photo of Silicon Power UD90 4TB. View this offer in Where to buy
Silicon Power · SSD · PCIe 4.0
Silicon Power UD90 4TB
Works well for: Game & File Storage, System Drive
Trade-offs: Current price sits $171 above the strong-value threshold (~$329)
- Capacity
- 4 TB
- Interface
- M.2 PCIe 4.0 x4
- Sequential read
- 5000 MB/s
- Sequential write
- 3200 MB/s
- Endurance
- 2400 TBW
- Form factor
- M.2-2280
Move a slider and the page re-scores this product against the same market frame.
Is this a good buy today?
Market confidence: LowAt $500 the Silicon Power UD90 4TB is priced in line with its $500 representative market level. Only one retailer currently backs that price, so the level is a single data point rather than a market.
Limited market: only one retailer currently has a verified offer, so treat this price as a single data point.
Prices & availability
Where to buy the Silicon Power UD90 4TB
Compare the offers we track for this model, across variants and retailers.
1 tracked offers · 1 retailers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| Silicon Power UD90 4TB | Newegg | New | $500 | 60 | 2026-09-30 | View offer → |
| Silicon Power UD90 4TBMultiple variants available | Amazon Affiliate | Varies | Find on Amazon | Not tracked | No price snapshot | Find on Amazon → |
Prices are dated snapshots, not live quotes — confirm the final price at the store. New, refurbished and used offers are listed separately; used offers carry warranty and seller risk.
Where it stands in the field
Two different questions, side by side. Performance compares what the hardware can do; Value compares what that capability costs at today’s price. A product can rank high on one and low on the other — that gap is the point.
Performance Balanced
How much it can do. Price plays no part in this ranking.
#122 of 371 graded solid state drives
- #119 Western DigitalWestern Digital Black SN770 1TB 35
- #120 Western DigitalWestern Digital SN770M 1TB 35
- #121 TeamGroupTeamGroup FORCE G50 4TB 34
- #122 Silicon PowerSilicon Power UD90 4TB 34
- #123 CorsairCorsair MP600 CORE XT 4TB 34
- #124 PatriotPatriot VP4000 Mini 2TB 34
- #125 Silicon PowerSilicon Power UD90 2TB 34
Value Balanced
How much of that you get for today’s price.
#75 of 371 currently priced solid state drives
- #72 MSIMSI SPATIUM M480 2TB 60
- #73 CorsairCorsair MP700 Elite 1TB 60
- #74 LexarLexar NQ780 4TB 60
- #75 Silicon PowerSilicon Power UD90 4TB 60
- #76 Western DigitalWestern Digital Black SN770 1TB 60
- #77 Western DigitalWestern Digital WD_Black SN850X 1TB 59
- #78 TeamGroupTeamGroup NV5000 2TB 59
Performance System Drive
How much it can do. Price plays no part in this ranking.
#122 of 371 graded solid state drives
- #119 Western DigitalWestern Digital Black SN770 1TB 35
- #120 Western DigitalWestern Digital SN770M 1TB 35
- #121 TeamGroupTeamGroup FORCE G50 4TB 34
- #122 Silicon PowerSilicon Power UD90 4TB 34
- #123 CorsairCorsair MP600 CORE XT 4TB 34
- #124 PatriotPatriot VP4000 Mini 2TB 34
- #125 Silicon PowerSilicon Power UD90 2TB 34
Value System Drive
How much of that you get for today’s price.
#151 of 371 currently priced solid state drives
- #148 SamsungSamsung 990 EVO 1TB 14
- #149 CorsairCorsair MP600 MICRO 2TB 14
- #150 CrucialCrucial P3 Plus 2TB 14
- #151 Silicon PowerSilicon Power UD90 4TB 14
- #152 CrucialCrucial P5 Plus 1TB 14
- #153 GigabyteGigabyte AORUS 1TB 14
- #154 CrucialCrucial P5 Plus 2TB 14
Performance Game
How much it can do. Price plays no part in this ranking.
#37 of 371 graded solid state drives
- #34 KingstonKingston NV3 4TB 50
- #35 Western DigitalWestern Digital WD Blue SN5000 4TB 50
- #36 TeamGroupTeamGroup FORCE G50 4TB 50
- #37 Silicon PowerSilicon Power UD90 4TB 50
- #38 CorsairCorsair MP600 CORE XT 4TB 50
- #39 CrucialCrucial P3 Plus 4TB 50
- #40 Silicon PowerSilicon Power US75 4TB 50
Value Game
How much of that you get for today’s price.
#5 of 371 currently priced solid state drives
- #2 TeamGroupTeamGroup FORCE G50 4TB 98
- #3 Western DigitalWestern Digital Blue SN5100 4TB 95
- #4 CrucialCrucial T705 4TB 93
- #5 Silicon PowerSilicon Power UD90 4TB 92
- #6 Western DigitalWestern Digital SN7100 4TB 90
- #7 KingstonKingston NV3 4TB 90
- #8 TeamGroupTeamGroup MP44Q 4TB 89
Performance Heavy Creative Work
How much it can do. Price plays no part in this ranking.
#164 of 371 graded solid state drives
- #161 PatriotPatriot VP4000 Mini 1TB 25
- #162 TeamGroupTeamGroup MP44S 1TB 25
- #163 SolidigmSolidigm P41 Plus 2TB 24
- #164 Silicon PowerSilicon Power UD90 4TB 23
- #165 Silicon PowerSilicon Power UD90 2TB 23
- #166 Silicon PowerSilicon Power UD90 1TB 23
- #167 TranscendTranscend MTE240S 1TB 23
Value Heavy Creative Work
How much of that you get for today’s price.
#116 of 371 currently priced solid state drives
- #113 CorsairCorsair MP600 ELITE 1TB 14
- #114 CrucialCrucial T500 4TB 14
- #115 PNYPNY CS2241 2TB 13
- #116 Silicon PowerSilicon Power UD90 4TB 13
- #117 Silicon PowerSilicon Power US75 4TB 13
- #118 MSIMSI SPATIUM M461 2TB 13
- #119 Western DigitalWestern Digital SN770M 2TB 13
These ladders follow the preset scenario shown above. Your own weights re-score this product, not the whole field.
What it is good for
| Scenario | this productCapability grade · Value at current price | Higher capability | Higher Value with current priorities |
|---|---|---|---|
| Balanced (all-round)Weighted all-round view | GradeNo grade Value60 | Higher capability Crucial T710 1TB 91 +198% capability · -56% price | Higher Value with current priorities Crucial T705 2TB 100 +190% capability · -30% price |
| System DriveScenario capability | GradeA Value14 | Higher capability Higher capability · Higher Value with current priorities Crucial T710 1TB S 100 +198% capability · -56% price | |
| Game & File StorageScenario capability | GradeS Value92 | — | Higher Value with current priorities Western Digital WD Blue SN5000 4TB S 100 +0% capability · -8% price |
| Heavy Creative WorkScenario capability | GradeB Value13 | Higher capability Higher capability · Higher Value with current priorities Western Digital SN8100 2TB S 87 +338% capability · -20% price | |
Balanced has no letter: it is a weighting preset, not a capability rubric. A grade answers “how well does this handle that job?” — price is never part of it. Relative Value puts the current market price back in.
Trade-offs
Works well if
- Game & File Storage is your main prioritygraded S for Game & File Storage on the same rubric as the tier list
- Strong-value threshold: ~$329$329 is where Relative Value reaches 80 with Balanced priorities, in the 2026-09-30 offer frame
Consider other options if
- Current price sits $171 above the strong-value threshold (~$329)cheapest tracked $500 against a $329 calculated threshold with Balanced priorities
- Value for money matters more to you than this exact modelCrucial T705 2TB holds Relative Value 100 against its 60 with Balanced priorities, at $350
Works well if
- System Drive is your main prioritygraded A for System Drive on the same rubric as the tier list
Consider other options if
- You want strong value for System Drive specificallycompeting products deliver so much more for System Drive per dollar that no price this model realistically trades at reaches the strong-value mark for this job
- Value for money matters more to you than this exact modelCrucial T710 1TB holds Relative Value 100 against its 14 for System Drive, at $220
- You are buying for System Drive and want no asterisksthe rubric caps this grade: read speed taken from another capacity of the same drive family — not measured for this exact model
Works well if
- Game is your main prioritygraded S for Game on the same rubric as the tier list
- Today's price already clears the strong-value markcheapest tracked $500 against a $617 threshold for Game
Consider other options if
- Value for money matters more to you than this exact modelWestern Digital WD Blue SN5000 4TB holds Relative Value 100 against its 92 for Game, at $460
Works well if
- Heavy Creative Work is your main prioritygraded B for Heavy Creative Work on the same rubric as the tier list
Consider other options if
- You want strong value for Heavy Creative Work specificallycompeting products deliver so much more for Heavy Creative Work per dollar that no price this model realistically trades at reaches the strong-value mark for this job
- Value for money matters more to you than this exact modelWestern Digital SN8100 2TB holds Relative Value 87 against its 13 for Heavy Creative Work, at $401
- You are buying for Heavy Creative Work and want no asterisksthe rubric caps this grade: write speed inferred, not measured for this exact model
Every line states the fact it was derived from, for the scenario selected above. Thresholds are calculated points on our value curve — information about where the maths turns, not instructions about what to pay.
Similar options to the Silicon Power UD90 4TB
Chosen for Balanced
Chosen for System Drive
Chosen for Game
Chosen for Heavy Creative Work
Alternatives stay near this product’s price range. Step-up options may exceed the standard budget envelope when the capability gain is meaningful.
Upgrade planner
Judge the change in the active scenario, then make the cash gap explicit.
Using page scenarioWhat are you upgrading from? These are the axes we compare on, and where this product stands in the current market.
Capability differences are expressed as tiers and index points, not as benchmark percentages we did not measure.
Specifications & compatibility
What this product is, and what to check before it goes into your build.
Performance
- Sequential read
- 5000 MB/s
- Sequential write
- 3200 MB/s
- Random read
- 0 IOPS
- Random write
- 0 IOPS
Media
- Capacity
- 4 TB
Power / Interface
- Interface
- M.2 PCIe 4.0 x4
- Form factor
- M.2-2280
Physical / Outputs
- Heatsink included
- No
Show all specifications
Endurance & warranty
- Endurance
- 2400 TBW
- Warranty
- 5 years
- Manufacturer part number
- SP04KGBP44UD9005
Hover any value to see where it came from: a manufacturer specification, or a figure The Comparator calculated.
Sources: Comparator offer frame 2026-09-30
What to check in your build
M.2-2280
The slot must take M.2-2280
M.2 PCIe 4.0 x4
PCIe 4.0 M.2 slot for full speed
PCIe 4.0 — runs in older slots at their speed
Fits under an M.2 shroud
Bare drive — it fits under a motherboard M.2 shroud
Below Sony's PS5 speed guidance
Sony asks for PCIe 4.0 and 5500 MB/s read; this drive reads 5000 MB/s over M.2 PCIe 4.0 x4
Found an error? Report this specification Email the field, corrected value and an optional source.
Compatibility guidance is practical help, not a score. Missing data is shown as unknown, never invented.
Summary
Silicon Power UD90 4TB offers a balanced view across an all-round mix of priorities. It ranks #122 by capability in the current modelled field. Its clearest measured strength is drive capability 5000. Crucial T705 2TB currently clears the same practical bar with stronger Relative Value.
Silicon Power UD90 4TB offers A-grade capability for System Drive. It ranks #122 by capability in the current modelled field. Its clearest measured strength is drive capability 5000. Crucial T705 2TB currently clears the same practical bar with stronger Relative Value.
Silicon Power UD90 4TB offers S-grade capability for Game. It ranks #37 by capability in the current modelled field. Its clearest measured strength is drive capability 5000. TeamGroup Force Vulcan 4TB currently clears the same practical bar with stronger Relative Value.
Silicon Power UD90 4TB offers B-grade capability for Heavy Creative Work. It ranks #164 by capability in the current modelled field. Its clearest measured strength is drive capability 5000. Crucial T705 2TB currently clears the same practical bar with stronger Relative Value.
FAQ
Why does Relative Value change when I choose another scenario?
Each scenario changes the weights applied to capability, price and the other published factors. The hardware facts stay fixed, but the value question changes, so its score and rank can change too.
Why can Amazon appear without a tracked price?
Amazon is shown as a discovery link when we do not have a permitted verified price snapshot. It is excluded from price comparisons, rankings and Relative Value until a compliant tracked price exists.
Useful links & sources
offer frame 2026-09-30 · formula ssd-value-v1.5 · facts facts-2026-09-30 · Relative Value is an estimate from our current dataset, the selected weights and dated market prices — not an official product rating and not a price forecast. Target prices are calculation thresholds, not predictions. Methodology We are not a shop. Affiliate links may earn us a commission; they never change the calculations or the ranking.