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Silicon Power UD90 1 TB (Micron N48R)

1 TB
Capacity
Phison E21T
Controller
QLC
Flash
PCIe 4.0 x4
Interface
M.2 2280
Form Factor

Multiple hardware versions found.

Performance could vary due to unannounced flash/controller changes.

SSD Controller
Controller
The Silicon Power UD90 is a solid-state drive in the M.2 2280 form factor, launched on May 20th, 2022. It is available in capacities ranging from 1 TB to 2 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the Silicon Power UD90 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the PS5021-E21T from Phison, a DRAM cache is not available. Silicon Power has installed 176-layer QLC NAND flash on the UD90, the flash chips are made by Micron. Please note that this SSD is sold in multiple variants with different NAND flash or controller, which could affect performance, the "Notes" section at the end of this page has more info. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are soaked up more quickly. The cache is sized at 69 GB, once it is full, writes complete at 1800 MB/s. Copying data out of the SLC cache (folding) completes at 275 MB/s. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The UD90 is rated for sequential read speeds of up to 4,800 MB/s and 4,200 MB/s write; random IOPS reach up to 570K for reads and 600K for writes.
At its launch, the SSD was priced at 110 USD. The warranty length is set to five years, which is an excellent warranty period. Silicon Power guarantees an endurance rating of 600 TBW, a typical value for consumer SSDs.

Solid-State-Drive

Capacity: 1 TB (1000 GB)
Variants: 1 TB 2 TB
Hardware Versions:
Overprovisioning: 92.7 GB / 10.0 %
Production: Active
Released: May 20th, 2022
Price at Launch: 110 USD
Part Number: SP01KGBP44UD9005
Market: Consumer

Physical

Form Factor: M.2 2280 (Single-Sided)
Interface: PCIe 4.0 x4
Protocol: NVMe 1.4
Power Draw: 0.99 W (Idle)
2.5 W (Avg)
3.7 W (Max)

Controller

Manufacturer: Phison
Name: PS5021-E21T
Architecture: ARM 32-bit Cortex-R5
Core Count: Triple-Core
Frequency: 1,000 MHz
Foundry: TSMC
Process: 12 nm
Flash Channels: 4 @ 1,600 MT/s
Chip Enables: 4
Controller Features: HMB (enabled)

NAND Flash

Manufacturer: Micron
Name: N48R FortisFlash
Type: QLC
Technology: 176-layer
Speed: 1600 MT/s
Capacity: 4 chips @ 2 Tbit
ONFI: 4.2
Topology: Replacement Gate
Die Size: 69 mm²
(14.8 Gbit/mm²)
Dies per Chip: 2 dies @ 1 Tbit
Planes per Die: 4
Decks per Die: 2
Word Lines: 195 per NAND String
90.3% Vertical Efficiency
Read Time (tR): 98 µs
Program Time (tProg): 2339 µs
Block Erase Time (tBERS): 7.5 ms
Die Read Speed: 695 MB/s
Die Write Speed: 27 MB/s
Endurance:
(up to)
1500 P/E Cycles
(100000 in SLC Mode)
Page Size: 16 KB
Block Size: 2816 Pages
Plane Size: 817 Blocks

DRAM Cache

Type: None
Host-Memory-Buffer (HMB): 64 MB

Performance

Sequential Read: 4,800 MB/s
Sequential Write: 4,200 MB/s
Random Read: 570,000 IOPS
Random Write: 600,000 IOPS
Endurance: 600 TBW
Warranty: 5 Years
MTBF: 1.5 Million Hours
Drive Writes Per Day (DWPD): 0.3
SLC Write Cache: approx. 69 GB
(dynamic only)
Speed when Cache Exhausted: approx. 1800 MB/s
Cache Folding Speed: 275 MB/s

Features

TRIM: Yes
SMART: Yes
Power Loss Protection: No
Encryption:
  • No
RGB Lighting: No
PS5 Compatible: Yes

Reviews

Same Drive

This section lists other SSDs in our database using the exact same hardware components

Notes

Controller:

1 main core using Cortex-R5 with CoXProcessor technology running at 980 ~ 1000 MHz (one additional dual-core) Cortex-R5 clocked at a lower clock for better efficiency

NAND Die:

Read Time (tR): 98 µs ~ 128 µs

Jun 1st, 2024 02:58 EDT change timezone

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