Overview

The ALYNCE JS990 512GB SSD is an internal NVMe drive in the M.2 2280 form factor, built on the PCIe Gen4 x4 interface. With sequential read speeds up to 5,000MB/s and write speeds up to 4,400MB/s, it dramatically reduces boot times, application launches, and game loading. The 512GB capacity offers a balanced storage size for the operating system, key applications, and a handful of modern games. It targets entry-to-mid-range PC builds and users upgrading from older SATA SSDs or HDDs.
The drive uses a multi-layer PCB for better heat dissipation and a low-power controller to minimize energy consumption and heat output. With no moving parts, it offers excellent shock resistance, making it suitable for notebooks and game consoles such as the PS5. It is sold exclusively on online retailers and comes with a 3-year limited warranty.

Compatibility Guide

  • Form factor: M.2 2280 (22mm wide, 80mm long)
  • Interface: Requires a PCIe Gen4 x4 slot (NVMe 1.3 or later). Works in Gen3 slots but performance will be limited to Gen3 speeds
  • Supported devices: Any PC or laptop with an M.2 NVMe slot, as well as PS5
  • Power: The SSD draws only a few watts, so adding it to an existing system has negligible impact on the PSU
  • Note: On older motherboards, you may need to enable NVMe mode in BIOS. For best performance, use a CPU-attached M.2 slot

Product Info

The ALYNCE JS990 512GB SSD launched around late 2024 (exact date unclear) and is available exclusively through online retailers. The price at review time is approximately ¥36,745. The warranty period is 3 years (limited). It sits in the entry-to-midrange PCIe Gen4 SSD segment, offering competitive sequential speeds at a moderate price point. However, it lacks a DRAM cache and does not publicly disclose TBW (Total Bytes Written) endurance, indicating a cost-optimized design.
Its 5,000MB/s read speed is standard for a Gen4 drive; you’ll notice faster level loading in games and quicker file transfers compared to SATA or Gen3 drives. Random IO performance is not advertised but is expected to be typical for a DRAM-less TLC-based SSD.

Best Use Cases

  1. Upgrading from a SATA SSD
    If you’re still on a SATA SSD (approx. 550MB/s), this drive delivers roughly 9x faster sequential reads. Boot times and application startup become noticeably quicker, making it a cost-effective upgrade path.
  2. Secondary storage for a gaming PC
    Use it as a dedicated game library drive. The 5,000MB/s read speed is more than enough for current game titles, and the 512GB capacity can hold several AAA games alongside your primary drive.
  3. Budget-friendly Gen4 drive for a secondary or home server
    For users who want Gen4 speeds without paying premium prices, this SSD fits well. It’s also suitable as a cache drive or OS drive in a non-critical system.

Things to Consider

First, the lack of official TBW (total bytes written) rating is a concern. If you plan to perform heavy write workloads (video editing cache, database logging), this drive may not be suitable. Additionally, the absence of a DRAM cache (not explicitly stated but likely) can lead to slower random write performance compared to DRAM-equipped models, though sequential performance remains strong.
Pricing – around ¥36,745 – is higher than comparable competing models like the Crucial P3 Plus or Kingston NV2. It’s worth watching for discounts or considering alternatives if budget is tight.
If your motherboard only supports PCIe Gen3, you won’t get the advertised speeds; a cheaper Gen3 drive would be a better buy. Also, the 512GB capacity may feel cramped for users with large game libraries or who store many media files.

FAQ

Q: Can I use this SSD in a PS5?
A: Yes, the PS5 supports M.2 PCIe Gen4 x4 NVMe drives (2280 size). However, the PS5 recommends a minimum read speed of 5,500MB/s for optimal performance. The JS990’s 5,000MB/s read speed is below that threshold, so while it will work, it may not deliver the fastest loading times. Also, you must install a separate heatsink because this drive does not include one.
Q: Is this SSD good for a budget gaming PC build?
A: It can be, provided your motherboard supports PCIe Gen4. You’ll get faster level loads compared to a Gen3 drive, which is noticeable in open-world games. However, the higher price per gigabyte compared to cheaper Gen3 options may not be justified if you only play lightweight titles. For pure gaming, even a good Gen3 drive like the WD Blue SN570 would be more cost-effective.
Q: Does the ALYNCE JS990 support Windows installation without extra drivers?
A: Yes, for Windows 10 and 11, it is natively recognized during installation. For Windows 7, you would need to inject NVMe drivers into the installation media. We recommend using Windows 10 or later for hassle-free setup.

Product Disclosure (Amazon)

  • Manufacturer: ALYNCE
  • Seller: APPI STORE
  • Fulfilled by: APPI STORE
  • ASIN: B0G6D7GR2B
  • Note: This article covers a manufacturer-made product based on Amazon listing details.