Comparing: Seagate Momentus Thin ST320LT012-9WS14C vs Western Digital PC SN740 512GB
In this comparison, we analyze two Disks: Seagate Momentus Thin ST320LT012-9WS14C and Western Digital PC SN740 512GB, using synthetic benchmark tests to evaluate their overall performance. This side-by-side comparison helps users understand which hardware delivers better value, speed, and efficiency based on standardized testing. Whether you're building a new system or upgrading an existing one, this benchmark-driven evaluation offers valuable insights to guide your decision.

Seagate Momentus Thin ST320LT012-9WS14C
Type: | Disks |
---|---|
Model: | Seagate ST320LT012-9WS14C |
Capacity: | 320 GB |
Interface: | SATA-II 3Gbps |

Western Digital PC SN740 512GB
Type: | Disks |
---|---|
Model: | PC SN740 512GB |
Capacity: | 512GB |
Interface: | PCIe 4.0 x4 |
Specification Comparison Table
This specification comparison presents technical details of several devices or components to help you understand the key differences between each option. Use this table as a reference to determine which device best suits your needs.
Specification | Seagate Momentus Thin ST320LT012-9WS14C | Western Digital PC SN740 512GB |
---|---|---|
Brand | Seagate | Western Digital |
Format | HDD 2.5 | SSD M.2 NVMe 2280 |
Capacity | 320 GB | 512GB |
Interface | SATA-II 3Gbps | PCIe 4.0 x4 |
Submission Comparison Table
This submission comparison table displays the number and details of benchmark data submissions from various devices or components. This information helps you understand the performance based on the benchmarks that have been tested, as well as providing an overview of the consistency and popularity of the available benchmark results.
No. | Benchmark Software | Seagate Momentus Thin ST320LT012-9WS14C | Western Digital PC SN740 512GB |
---|---|---|---|
1 | AS-SSD |
Read: 54.55 MB/s Write: 52.68 MB/s |
Read: 3795.33 MB/s Write: 1879.37 MB/s |
2 | ATTO Disk Benchmark - 64M |
Read: 51.51 MB/s Write: 50.44 MB/s |
Read: 4720.00 MB/s Write: 3670.00 MB/s |
3 | Cross Platform Disk Test |
Read: 59.23 MB/s Write: 42.67 MB/s |
Read: 3410.00 MB/s Write: 1550.00 MB/s |
4 | CrystalDiskMark |
Read: 84.67 MB/s Write: 83.84 MB/s |
Read: 3913.58 MB/s Write: 3453.18 MB/s |
Submission Comparison Chart
This chart visualizes the benchmark scores comparison between two hardware devices based on submitted data.
Media Gallery
A collection of photos of tested hardware. These images can help you identify the physical form, model, and variant of the hardware in question. These photos are from our own documentation, and if they are not available we may not be able to document them.
About Hardware Seagate Momentus Thin ST320LT012-9WS14C
Seagate ST320LT012-9WS14C is a 320GB capacity hard disk drive (HDD) with a slim 2.5-inch form factor, ideal for laptops, notebooks and other portable systems. Designed using a SATA II (3Gbps) interface and a rotation speed of 5400 RPM, this HDD emphasizes power efficiency and quieter operation compared to higher-speed HDDs.
It uses 1 platter and 2 read/write heads, a common configuration for 320GB capacity, with light weight and low power consumption-suitable for mobile devices. Equipped with 16MB of buffer cache, its performance is sufficient for daily tasks such as saving documents, running light applications, or storing multimedia files.
This Seagate ST320LT012-9WS14C performance test was conducted using an HP 1000 1b05AU laptop that still relies on 4GB DDR3 Single Channel RAM with two DIMM slots. The operating system used during the test was Windows 7 64-bit, which is a typical environment for entry-level laptops in this era of HDD usage. The hardware combination reflects the real usage scenarios of older generation laptop users who still rely on mechanical hard disks as the primary storage medium.
In tests using CrystalDiskMark benchmark software, the Seagate ST320LT012-9WS14C hard disk recorded a fairly stable performance for the 5400 RPM HDD class. The sequential read speed reached 84.67 MB/s, while the sequential write speed stood at 83.84 MB/s. These results show that despite being an older generation HDD with modest specifications, its performance is still adequate for everyday light computing needs such as document storage and media playback.
Although its performance falls short of modern SSDs, the Seagate ST320LT012-9WS14C remains a reliable and cost-effective choice for users who need additional internal storage on older laptops, educational systems, or as external media (with a USB case). Its compact size and low power consumption also make it suitable for use in netbooks and other energy-efficient devices.
Device Test:
Device: HP 1000 1b05au
RAM: 4GB DDR3 Single Channel 2 DIMM
OS: Windows 7
Wednesday, 26 December 2012 14:27:32 | Update: 1 month ago
About Hardware Western Digital PC SN740 512GB
The Western Digital PC SN740 is a high-performance NVMe SSD specifically designed to meet the needs of modern computing, especially in ultrabooks, business laptops and other compact devices. It features a PCIe Gen4 x4 interface and NVMe 1.4 protocol, which enables extremely fast read and write speeds, making it an ideal storage solution for intensive multitasking, big data processing, and a responsive and efficient computing experience.
The SN740 comes in various capacities ranging from 256GB, 512GB, 1TB, to 2TB, providing flexibility for users with different storage needs. Built with Western Digital 3D NAND technology, the SSD offers not only high performance, but also excellent power efficiency and long-term durability. Its availability in two form factors, M.2 2230 and M.2 2280, makes it highly compatible with many of the latest devices, including thin laptops and small industrial systems.
In a real-world test using an Acer Aspire 5 A515-58P laptop equipped with an Intel Core i5-1335U processor, 8GB LPDDR5 RAM and running Windows 11 operating system, the SSD ran on PCIe Gen3 x4 mode due to laptop slot limitations. Despite not running at full PCIe Gen4 speed, the benchmark results still showed excellent performance. Tests with CrystalDiskMark recorded read speeds of up to 3913.58 MB/s and write speeds of 3453.18 MB/s, while AS-SSD Benchmark recorded read speeds of 3795.33 MB/s and write speeds of 1879.37 MB/s. These numbers show that even on a PCIe Gen3 interface, the WD SN740 still offers premium performance that can compete with other high-end SSDs.
In addition to performance, the Western Digital SN740 also features enhanced security and power efficiency, making it a great choice for mobile professionals, software developers, and general users who desire fast and durable storage. With the combination of high data transfer speeds, compact design and Western Digital's brand reputation for reliability, this SSD is one of the best-in-class choices for storage upgrades on modern devices.
Device test (testbed):
Device: Acer Aspire 5 A515-58P
NVMe Capacity: 512GB
PCIe: Gen3 x4 (for run this NVMe)
CPU: i5-1335U
RAM: 8GB LPDDR5
OS: Windows 11
Tuesday, 15 August 2023 13:16:33 | Update: 1 month ago