Silicon Power XPOWER XS90
Expert rating7.2 / 10
- Interface:
- PCIe 5.0 NVMe
- Capacity Options:
- 1TB
- Sequential Read:
- Up to 14
- DRAM Cache:
- LPDDR4 DRAM
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Manufacturer: Silicon Power Last updated: 2026-09-14
Silicon Power XPOWER XS90 (PCIe 5.0 NVMe/14,300 MB/s Read/13,400 MB/s Write/Heatsink-less Gen 5 Flagship) Review
Looking for the Silicon Power XPOWER XS90 (model SP02KGBP54XS9005)? It's Silicon Power's new PCIe 5.0 NVMe 2.0 flagship, rated at up to 14,300 MB/s sequential read and 13,400 MB/s sequential write, launching in 1TB, 2TB, and 4TB capacities.
Quick take: on paper this puts the XS90 right in the thick of the fastest Gen5 drives we track, competitive with the Samsung 9100 PRO and Kingston FURY Renegade G5 on raw read speed, and it ships with no heatsink, which is either a plus or a minus depending on whether your motherboard already has one built in. This is a brand-new launch with almost no independent benchmarking yet, and Silicon Power's own press materials leave out NAND type, TBW endurance, and pricing, so we're being upfront that several fields below are marked unconfirmed rather than guessed at.
Where It Sits in the Gen 5 Speed Race
14,300 MB/s read puts the XS90 just behind the very top of the Gen5 pack (WD_BLACK SN8100 at 14,900 MB/s, Kingston FURY Renegade G5 at 14,800 MB/s, Patriot Viper VP4300 and Samsung 9100 PRO both at 14,700 MB/s) but ahead of plenty of mainstream Gen5 drives like the Corsair MP700 PRO SE (14,000 MB/s) and Sabrent Rocket 5 (14,000 MB/s). Write speed at 13,400 MB/s is genuinely strong for this tier, beating the Kingston FURY Renegade G5's 13,800 write by a hair less but still comfortably ahead of the Corsair MP700 PRO (11,800 write). The LPDDR4 DRAM cache is a real DRAM-backed design, not a DRAM-less HMB drive, which matters for sustained random I/O and metadata-heavy workloads.
No Heatsink, and What's Missing From the Spec Sheet
Silicon Power is shipping the XS90 bare, betting that most current motherboards already include an M.2 heatsink and that buyers who need one can add their own. That's a reasonable call for a drive this fast, since Gen5 controllers run hot enough that a bare drive in a poorly-ventilated case could throttle. What we can't tell you yet: the exact NAND type (Silicon Power hasn't said TLC or otherwise), the TBW endurance rating per capacity, or launch pricing. Those are the kind of numbers that normally show up once a drive hits retail listings or gets torn down by a reviewer, and as of this write-up none of that exists publicly. We'll update this listing once real numbers land.
Comparison to Alternatives
We already carry Silicon Power's previous-generation XPOWER XS70 (PCIe 4.0, 7,300 MB/s read / 6,800 MB/s write), and the jump to the XS90's 14,300/13,400 MB/s roughly doubles both read and write throughput, which tracks with the general Gen4-to-Gen5 uplift we've seen across other brands. Against same-generation rivals, the Corsair MP600 Elite (PCIe 4.0, 7,000/6,500) is a full generation behind, while true Gen5 peers like the Sabrent Rocket 5 and Patriot Viper VP4300 are the more relevant comparison points, and the XS90 holds its own against both on paper. Whether it holds up on price and endurance once those numbers are public is still an open question.
Specifications
Identity
| Brand | Silicon Power |
|---|---|
| Model Number | SP02KGBP54XS9005 (2TB SKU; series also sold as 1TB and 4TB) |
| Series | XPOWER XS90 |
Interface and form
| Bus Interface | PCIe Gen 5 x4, NVMe 2.0 |
|---|---|
| Form Factor | M.2 2280 |
Sequential performance
| Sequential Read | 14300 MB/s |
|---|---|
| Sequential Write | 13400 MB/s |
Controller and cache
| Controller | TSMC 6nm-process controller (specific model number not disclosed in launch materials) |
|---|---|
| DRAM Cache | LPDDR4 DRAM cache |
NAND
| NAND Type | Not officially disclosed at launch; unconfirmed, treat as unverified until Silicon Power or a teardown confirms TLC vs QLC |
|---|
Power and thermals
| Heatsink | No pre-attached heatsink (bare M.2 2280 design for broad motherboard/laptop compatibility) |
|---|
Physical and commercial
| Warranty | 5 Years |
|---|
| Capacity Options | 1TB, 2TB, 4TB |
|---|---|
| Endurance (TBW) | 2026 |
| Price | Not announced at launch |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating7.2 / 10
Strong headline speeds that land it firmly among the fastest Gen5 consumer drives on paper, but we're marking this down slightly from where the raw numbers alone would put it because pricing, TBW, and NAND type are all still unknown. Worth watching once it hits retail, not yet a slam-dunk recommendation.
Best for
- Buyers who already have a motherboard or laptop with a built-in M.2 heatsink and want top-tier Gen5 speed without paying for a redundant one
- Content creators and AI/ML workstation builders who want DRAM-backed caching at the top of the Gen5 speed chart
- Anyone upgrading directly from a Silicon Power XS70 or similar Gen4 drive who wants a straightforward generational leap
Not for
- Buyers who need a confirmed TBW/endurance number before committing to a drive for heavy write workloads
- Bare-metal builds with no case airflow or motherboard heatsink, since this ships with none
- Price-sensitive buyers, since Silicon Power hasn't announced pricing yet and Gen5 flagships typically launch at a premium
FAQs
What are the key specifications of the Silicon Power XPOWER XS90 (PCIe 5.0 NVMe/14,300 MB/s Read/13,400 MB/s Write/Heatsink-less Gen 5 Flagship)?
The Silicon Power XPOWER XS90 (PCIe 5.0 NVMe/14,300 MB/s Read/13,400 MB/s Write/Heatsink-less Gen 5 Flagship) is a component from Silicon Power. Key specs: Interface PCIe Gen 5 x4, NVMe 2.0, Capacity Options 1TB, 2TB, 4TB, Sequential Read 14300, Sequential Write 13400, Controller TSMC 6nm-process controller (specific model number not disclosed in launch materials).
Who is the Silicon Power XPOWER XS90 (PCIe 5.0 NVMe/14,300 MB/s Read/13,400 MB/s Write/Heatsink-less Gen 5 Flagship) best suited to?
It suits buyers who already have a motherboard or laptop with a built-in m.2 heatsink and want top-tier gen5 speed without paying for a redundant one, content creators and ai/ml workstation builders who want dram-backed caching at the top of the gen5 speed chart, anyone upgrading directly from a silicon power xs70 or similar gen4 drive who wants a straightforward generational leap.
What are the drawbacks of the Silicon Power XPOWER XS90 (PCIe 5.0 NVMe/14,300 MB/s Read/13,400 MB/s Write/Heatsink-less Gen 5 Flagship)?
It is a poor fit for buyers who need a confirmed tbw/endurance number before committing to a drive for heavy write workloads, bare-metal builds with no case airflow or motherboard heatsink, since this ships with none, price-sensitive buyers, since silicon power hasn't announced pricing yet and gen5 flagships typically launch at a premium.
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