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Kioxia BG4 512GB 80mm — Review & Specs | Pricepect | Pricepect

Home Solid State DrivesKioxia BG4 512GB 80mm

Kioxia BG4 512GB 80mm — image 1

Kioxia

Kioxia BG4 512GB 80mm

$99.00

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KBG40ZNV512G

Solid State Drives

Expert Review Analysis

The Kioxia BG4 KBG40ZNV512G is a single‑sided M.2 2280 PCIe Gen3 x4 NVMe SSD offering up to 2300 MB/s sequential reads, 61 MiB Host Memory Buffer and low 3 W power draw, aimed at thin laptops and ultrabooks. It provides solid random read performance and reliability while sacrificing sustained write speed and future‑proofing.

✓ Best for: Budget‑conscious ultrabook and thin‑laptop owners who need a low‑power, single‑sided M.2 2280 SSD for OS boot drives, everyday computing, light IoT or 2‑in‑1 notebooks where DRAM‑less efficiency is valued.✗ Not ideal for: Enthusiasts or professionals requiring high sustained write throughput, such as video editors, gamers, or users of next‑gen consoles like PS5, where PCIe Gen4 speeds and higher power budgets are expected.

Pros

✓Low power consumption of only 3 W max (3.7 W typical active) makes it ideal for thin laptops.
✓High sequential read performance up to 2300 MB/s and buffered 2273 MiB/s delivers fast boot and load times.
✓

Price History

Current

$99.00

Average

$48.50

Lowest

$45.99

Highest

$99.00

Price trend (90d):+16.5%

Best Seller Rank History

Now#13,753Best#476Worst#13,753 -13,277

Lower = better sales rank

Rating Trend

Rating4.1/ 5Reviews7

Specifications

Design

Height2.23 mm mm

Width22 mm mm

Length80 mm mm

Weight10 g g

Form FactorM.2 2280

Features

TRIM SupportSupported

Host Memory Buffer61 MiB MiB

Throttling ControlSupported

TCG OPAL 2.01Supported (optional)

Advanced FormatSupported

General

BrandKioxia

ModelKBG40ZNV512G

MTTF1.5 million hours

Full Self-Test Time27 minutes minutes

Maximum Temperature84°C °C

Performance

Sequential ReadUp to 2300 MB/s MB/s

Sequential WriteUp to 1400 MB/s MB/s

Random Read IOPSUp to 330,000

Random Write IOPSUp to 190,000

Power

Maximum Power Consumption3 W W

Typical Active Power3.7 W W

Storage

Capacity512.1 GB GB

Flash Memory TypeBiCS FLASH™ TLC (96-layer 3D NAND)

Reliability

Mean Time To Failure (MTTF)1.5 million hours

Diagnostics

Full Self‑Test Duration27 minutes

Thermal

Critical Maximum Temperature84 °C

Dimensions & Weight

Height0.1 inches

Width0.9 Inches

Depth3.2 inches

Research Sources

comx-computers.co.za

harddrivebenchmark.net

compuphoneparts.es

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User Reviews

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4.1

(7 reviews)

Strong random read capability up to 390 K IOPS provides responsive everyday multitasking.

✓Supports Host Memory Buffer (61 MiB) and TRIM, enabling DRAM‑less operation without major performance loss.

✓Robust reliability with 1.5 million‑hour MTTF and built‑in thermal throttling for stable operation.

Cons

✗Sustained sequential write speeds drop to around 988 MB/s in real‑world tests, below advertised 1400 MB/s.
✗Limited to PCIe Gen3 x4, so it cannot match the higher throughput of newer Gen4 SSDs.
✗No instant data destruction; self‑encrypting drive (SED) support is optional only.
✗Maximum operating temperature can reach 77 °C under prolonged load, which may cause throttling.

From Expert Reviews

Praised by Experts

✓Professional reviewers highlight its excellent power efficiency at just 3 W, making it suitable for ultrabooks.
✓Editors note the strong random read performance up to 390 K IOPS and buffered sequential reads near 2.3 GB/s.
✓Benchmark sites commend the Host Memory Buffer implementation, delivering DRAM‑less performance without major slowdown.

Criticized by Experts

✗Reviewers point out the real‑world sequential write speed caps around 1 GB/s, falling short of advertised figures.
✗Professional benchmarks rank the drive low overall (#4915), indicating middling performance compared to peers.
✗Editors mention the lack of PS5 compatibility and that the Gen3 interface limits future‑proofing.

From User Reviews

Users Love

✓Everyday users appreciate the easy compatibility with Dell, HP, and Lenovo laptops, allowing hassle‑free installation.
✓Customers report noticeably faster boot times thanks to the NVMe interface and high read speeds.

Users Complain About

✗Users frequently complain that write speeds drop to about 1 GB/s under load, affecting large file transfers.
✗Several users note the drive can become hot, reaching up to 77 °C during prolonged use, though throttling prevents crashes.

Expert Opinion

Professional reviewers praise the Kioxia BG4 for its power efficiency, strong random read performance, and effective Host Memory Buffer that lets a DRAM‑less design still feel responsive. However, they criticize its modest sustained write speeds, middling overall benchmark ranking, and the fact that it remains on a PCIe Gen3 interface, limiting its appeal for high‑performance or future‑proof builds.

What Users Say

Everyday users like the drive’s plug‑and‑play compatibility with major laptop brands and the noticeable boost in boot speed, but they commonly report that write performance falls off under load and that the SSD can run hot during extended use, even though thermal throttling keeps it safe.

Common Complaints

Write speeds dropping to around 1 GB/s under load, elevated temperatures up to 77 °C during prolonged activity, and the lack of instant secure erase.

What People Are Saying

“decent for everyday tasks”
HardDriveBenchmark

How It Compares

vs. WD SN520 512GB

Advantages

✓Slightly faster sequential writes (up to 1750 MB/s) than Kioxia.
✓Similar power efficiency with around 3.5 W consumption.

Disadvantages

✗Higher power draw than Kioxia's 3 W max.
✗No Host Memory Buffer advantage; similar DRAM‑less design.

Choose WD SN520 if you need a bit more write speed and can tolerate slightly higher power; stick with Kioxia for the lowest power and better thermal profile.

vs. SK hynix Gold P31 512GB

Advantages

✓Significantly higher sequential read/write (up to 3500/3200 MB/s).
✓Much higher random IOPS (up to 650 K) and cooler operation.

Disadvantages

✗Higher cost than the Kioxia BG4.
✗Power consumption similar but not lower than Kioxia's 3 W.

Pick SK hynix Gold P31 for performance‑critical laptops; opt for Kioxia when power budget and price are tighter.

vs. Samsung 970 EVO Plus 512GB

Advantages

✓DRAM‑equipped design delivers top‑tier sequential and random performance.
✓Higher sustained write speeds (up to 3300 MB/s).

Disadvantages

✗Consumes roughly double the power (~6 W) and runs hotter.
✗More expensive and overkill for basic ultrabook use.

Select Samsung 970 EVO Plus for demanding workloads; Kioxia BG4 remains the better choice for low‑power, thin‑form‑factor laptops.