Silicon Power XS70 1 TB SSD Review - Fast and Great Value 25

Silicon Power XS70 1 TB SSD Review - Fast and Great Value



Silicon Power Logo

Silicon Power is a Taiwanese hardware manufacturer founded in 2003. In enthusiast circles, they are well known for providing high-quality flash storage products at reasonable pricing. Silicon Power's various product lines include DRAM modules, SSDs, flash drives, and portable storage.

In today's review, we'll be taking a look at the Silicon Power XS70 1 TB SSD. This latest SSD release is built around Phison's highly popular E18 controller paired with the newest 176-layer 3D TLC NAND flash from Micron—a combination we've seen in several other SSDs before, like the Kingston KC3000 and Corsair MP600 Pro LPX. Also included is 1 GB of DRAM cache from Samsung; it seems we're finally seeing a widespread market release of these Phison E18 with B47R drives.

The Silicon Power XS70 comes in capacities of 1 TB ($130), 2 TB ($250), and 4 TB ($750). Endurance for these models is set to 700 TBW, 1400 TBW, and 3000 TBW respectively. Silicon Power includes a five-year warranty with the XS70.

Specifications: Silicon Power XS70 1 TB SSD
Brand:Silicon Power
Capacity:1000 GB (931 GB usable)
24 GB additional overprovisioning
Controller:Phison PS5018-E18
Flash:Micron 176-Layer 3D TLC B47R
DRAM:1x 1 GB Samsung DDR4-2666
Endurance:700 TBW
Form Factor:M.2 2280
Interface:PCIe Gen 4 x4, NVMe 1.3
Warranty:5 years
Price at Time
of Review:
$130 / $130 per TB


Package Front
Package Back

The Drive

SSD Front
SSD Back

The drive uses the M.2 2280 form factor, which makes it 22 mm wide and 80 mm long.

SSD Interface Connector

While most other M.2 NVMe SSDs transfer data over the PCI-Express 3.0 x4 interface, the Silicon Power XS70 connects to the host system using a PCI-Express 4.0 x4 interface, which doubles the theoretical bandwidth.

SSD Teardown PCB Front
SSD Teardown PCB Back

On the PCB, you'll find the controller and four flash chips; one DRAM cache chip is installed, too, but the other side of the PCB is empty.

Silicon Power's cooler is a great-looking design that combines the black heatsink with a gray metal highlight. Nice!

The heatsink is installed using a clamshell construction with four screws.

On the previous picture, it seems like contact might be sub-optimal, but this photo confirms that everything makes good contact with the heatsink.

Chip Component Analysis

SSD Controller

The Phison PS5018-E18 is Phison's PCI-Express 4.0 controller with eight channels. It is produced on TSMC's 12 nanometer node and uses five Arm Cortex R5 CPU cores. The E18 supports NVMe 1.4, TLC, DDR4 memory, and up to 32 dies.

SSD Flash Chips

The four flash chips are Micron 176-layer 3D TLC NAND B47R. Each chip has a capacity of 256 GB.


A Samsung DDR4-2666 chip provides 1 GB of fast DRAM storage for the controller to store the mapping tables.

Test Setup

Test System SSD 2021
Processor:AMD Ryzen 3 3300X @ 4.3 GHz
Zen 2, 16 MB Cache
Motherboard:ASUS Prime X570-Pro
Memory:Zadak Spark RGB, 16 GB DDR4
@ 3200 MHz 16-18-18-38
Graphics:EVGA GeForce RTX 2060 KO 6 GB
Power Supply:Thermaltake
Toughpower GF1 Snow 750 W
Case:DarkFlash DLX22
Operating System: Windows 10 Professional 64-bit
Version 2004 (May 2020 Update)
Drivers:AMD Chipset:

Our Patreon Silver Supporters can read articles in single-page format.
Discuss(25 Comments)
Jul 1st, 2022 09:30 EDT change timezone

New Forum Posts

Popular Reviews

Controversial News Posts