The Kioxia BG4 256 GB SSD is a DRAM‑less NVMe drive available in M.2 2280 and 2230 form factors, featuring 96‑layer BiCS FLASH TLC NAND and up to 3050 MB/s sequential reads. It targets ultra‑thin laptops, IoT devices and budget‑friendly boot‑drive applications with low power draw and a compact profile.
Pros
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Cons
From Expert Reviews
Praised by Experts
Criticized by Experts
From User Reviews
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Expert Opinion
Professional reviewers view the BG4 256 GB as an efficient, cost‑effective solution for thin‑and‑light systems, emphasizing its strong sequential reads, low power draw and ultra‑compact size while acknowledging the inherent limits of a DRAM‑less architecture and PCIe 3.0 bandwidth.
What Users Say
Consumers generally appreciate the SSD’s fast boot experience, low heat and affordable price, but repeatedly mention that sustained write speeds fall off under load and that it is unsuitable for demanding creative or server workloads.
Common Complaints
Write speed degradation under load, occasional thermal throttling during long sessions, and limited endurance for heavy write scenarios.
What People Are Saying
“Fast OS loads, value for thin devices.”
“Write speeds drop under load (e.g., 800 MB/s sustained).”
How It Compares
vs. WD SN520 256GB (M.2 2230)
Advantages
Disadvantages
Choose WD SN520 if you need a proven, widely available 2230 drive with similar power characteristics; choose BG4 for a slightly higher write speed and thinner 2280 option.
vs. SK hynix Gold P31 256GB (M.2 2280)
Advantages
Disadvantages
Select the Gold P31 for performance‑critical laptops where speed outweighs size; select BG4 for ultra‑thin, power‑constrained devices.
vs. Samsung PM981a 256GB (M.2 2280)
Advantages
Disadvantages
Opt for the PM981a when endurance and sustained writes matter; opt for BG4 when you need the thinnest possible drive with lower power usage.
