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Intel 660p 2TB vs Kingston A400 240GB SSD Comparison

Comparison

Intel 660p 2TB vs Kingston A400 240GB SSD Comparison

The Intel 660p 2TB and Kingston A400 240GB are internal SSDs aimed at very different upgrade needs. Choose the Intel for a compatible M.2 NVMe system needing far more capacity and higher rated peak transfer speeds; choose the Kingston for a conventional 2.5-inch SATA hard-drive replacement with stronger supplied reliability, value, and satisfaction scores.

Expert tested Data driven Unbiased reviews Updated 2 August 2026
Intel 660p Series 2TB NVMe SSD

#1 Overall Winner

Intel 660p Series 2TB NVMe SSD

79/100
  • 2TB capacity provides substantially more room for game libraries, media, applications, and files.
View review
Kingston A400 240GB SATA SSD

Contender

Kingston A400 240GB SATA SSD

92/100
  • Strong overall, reliability, speed, value, and customer-satisfaction scores in the supplied comparison data.
View review

Quick verdict

Choose the Intel 660p 2TB for a compatible M.2 NVMe slot, large game or media storage, and higher rated peak transfer speeds. Choose the Kingston A400 240GB for a 2.5-inch SATA hard-drive upgrade, dependable everyday use, and stronger supplied reliability and satisfaction results.

Overall winner

Depends on your needs

At-a-glance comparison

Feature Intel 660p Series 2TB NVMe SSD Kingston A400 240GB SATA SSD Winner

Overall score

79

92

Kingston A400 240GB SATA SSD

Capacity

2TB

240GB

Intel 660p Series 2TB NVMe SSD

Interface and form factor

M.2 2280 PCIe NVMe 3.0 x4

2.5-inch SATA

Depends

Rated sequential read

Up to 1800 MB/s

Up to 500 MB/s

Intel 660p Series 2TB NVMe SSD

Rated sequential write

Up to 1800 MB/s

Up to 450 MB/s

Intel 660p Series 2TB NVMe SSD

Sustained heavy writes

Can slow after SLC cache fills

No comparable cache concern provided

Kingston A400 240GB SATA SSD

Reliability score

70

89

Kingston A400 240GB SATA SSD

Durability score

66

84

Kingston A400 240GB SATA SSD

Setup score

84

90

Kingston A400 240GB SATA SSD

Value score

89

93

Kingston A400 240GB SATA SSD

Customer satisfaction score

91

96

Kingston A400 240GB SATA SSD

Best fit

Large, read-heavy NVMe storage

2.5-inch SATA HDD replacement

Depends

Detailed comparison

Performance

Intel has the higher stated peak sequential performance, with up to 1800 MB/s reads and writes versus Kingston's up to 500 MB/s and 450 MB/s. That advantage is meaningful for compatible NVMe systems and lighter transfers that remain within the Intel's cache behavior. The supplied performance and speed scores nevertheless favor Kingston, reflecting its stronger everyday SATA-upgrade assessment. For sustained large writes, Intel reviews warn that performance can drop substantially after the SLC cache is filled; buyers with recurring heavy-write workloads should treat that limitation seriously.

Speed

For peak rated sequential speed, Intel is clearly ahead at up to 1800 MB/s read and write, compared with Kingston's up to 500 MB/s read and 450 MB/s write. Real-world behavior is more conditional: Intel reviewers report strong everyday and game-loading performance but possible severe slowdown after sustained large writes fill the SLC cache. Kingston's supplied speed score is higher and review feedback is consistently positive for an HDD-to-SSD upgrade, though SATA sets a lower ceiling.

Reliability

Kingston is the stronger choice on the supplied reliability score. Its review overview emphasizes reliable everyday operation, and several reviews describe long-running use without issues. Intel's reliability feedback is mixed: some users report good results, but the supplied summary notes concerns that it may not last, while QLC NAND and cache behavior make demanding write workloads a less suitable match. Neither drive should be selected without maintaining backups for important data.

Intel 660p Series 2TB NVMe SSD

Pros

  • 2TB capacity provides substantially more room for game libraries, media, applications, and files.
  • PCIe NVMe 3.0 x4 interface with rated sequential reads and writes up to 1800 MB/s.
  • M.2 2280 format is compact and suited to compatible notebooks, desktops, and M.2-equipped systems.
  • Review feedback regularly identifies strong value for large, read-heavy storage and gaming libraries.
  • High customer rating and positive installation feedback support its appeal for compatible systems.
  • Intel SSD Toolbox is mentioned by reviewers as a way to monitor or manage the drive.

Cons

  • QLC NAND is less appropriate for frequent, sustained heavy-write workloads.
  • Reviews report substantial write-speed reductions once the SLC cache is exhausted.
  • Some users report heat under load and recommend verifying cooling or heatsink needs.
  • Reliability feedback is mixed, and the durability score is lower than the Kingston's.
  • Requires an M.2 2280 PCIe/NVMe-compatible slot; it is not a drop-in 2.5-inch SATA replacement.
  • Concurrent read and write activity may be less smooth in some reported use cases.
Intel 660p Series 2TB NVMe SSD

Kingston A400 240GB SATA SSD

Pros

  • Strong overall, reliability, speed, value, and customer-satisfaction scores in the supplied comparison data.
  • 2.5-inch SATA form factor is a practical replacement option for many older desktops and laptops.
  • Rated for up to 500 MB/s reads and 450 MB/s writes, a major improvement over a mechanical hard drive.
  • Reviewers consistently report faster booting, loading, and everyday responsiveness after an HDD upgrade.
  • Very large review base with a 4.8/5 rating indicates broad buyer satisfaction.
  • No moving parts, with stated shock and vibration resistance for mobile-computer use.

Cons

  • 240GB capacity is far smaller than the Intel drive's 2TB capacity.
  • SATA limits rated sequential performance to 500 MB/s read and 450 MB/s write, well below the Intel's NVMe ratings.
  • It needs a 2.5-inch SATA bay or suitable mounting arrangement and a SATA data connection.
  • Some review feedback reports recognition or compatibility issues on particular computers.
  • The product contains the drive only; cloning software is not included.
  • Its feature score is lower, reflecting a simpler, older-interface storage design.
Kingston A400 240GB SATA SSD

Final verdict

The Kingston A400 240GB is the best overall option according to the supplied scoring, leading the Intel 660p in overall result, reliability, durability, setup, value, and customer satisfaction. It is particularly compelling for a basic 2.5-inch SATA hard-drive replacement where a modest-capacity operating-system and application drive is enough.

However, the Intel 660p 2TB is the more appropriate product for a different buyer: someone with a compatible M.2 NVMe slot who needs far more storage and higher rated peak sequential speeds. It is well suited to large game libraries and other predominantly read-heavy data, but its QLC NAND, mixed reliability feedback, heat reports, and sustained-write slowdowns make it a poorer fit for heavy-write professional workloads. Verify interface compatibility first; these are not interchangeable physical upgrades.

Overall winner

Depends on your needs

Frequently asked questions

<p>Which is better overall, the Intel 660p 2TB or Kingston A400 240GB?</p>

The supplied overall score favors the Kingston A400, supported by stronger reliability, durability, value, setup, and customer-satisfaction results. However, the Intel 660p is the more suitable choice for buyers who specifically need 2TB capacity and have a compatible M.2 NVMe slot. These drives address different upgrade paths rather than being direct like-for-like replacements.

<p>Which SSD is faster, the Intel 660p or Kingston A400?</p>

By stated sequential specifications, the Intel 660p is faster: it is rated up to 1800 MB/s for reads and writes, versus up to 500 MB/s reads and 450 MB/s writes for the Kingston A400. The Intel's reviews also warn that sustained large writes can slow sharply after its SLC cache fills, while the Kingston is constrained by SATA.

<p>Is the Intel 660p 2TB good for gaming storage?</p>

Yes. Review feedback repeatedly describes the Intel 660p as a strong fit for large, mostly read-heavy game libraries. Its 2TB capacity is useful as game sizes grow, and its NVMe interface offers higher rated sequential throughput than SATA. It is less appropriate if frequent, very large writes are a central part of the workload.

<p>Is the Kingston A400 240GB a good hard-drive replacement?</p>

It is positioned specifically as a 2.5-inch SATA HDD replacement, and supplied reviews commonly report noticeably improved booting, application loading, and general responsiveness after an upgrade. Confirm that the computer accepts a 2.5-inch SATA drive and keep its 240GB capacity in mind before choosing it for a large game or media collection.

<p>Which drive is easier to install?</p>

The Kingston has the higher setup score and uses the familiar 2.5-inch SATA format, making it a practical option for systems designed around a hard-drive bay. The Intel also receives positive installation feedback, but it requires a compatible M.2 2280 PCIe/NVMe slot. In either case, the correct physical connection is the deciding factor.

<p>Which SSD is more reliable according to the provided data?</p>

The Kingston A400 has the higher supplied reliability score, and its review overview is broadly positive about dependable everyday use. The Intel 660p has mixed reliability feedback and a lower durability score. Its QLC NAND and sustained-write behavior make workload selection more important, particularly for users who write large amounts of data regularly.

<p>Can the Intel 660p replace the Kingston A400 in any computer?</p>

No. The Intel 660p is an M.2 2280 PCIe NVMe drive, whereas the Kingston A400 is a 2.5-inch SATA drive. A computer that only provides a 2.5-inch SATA bay cannot accept the Intel without a different supported connection arrangement. Check the motherboard or laptop documentation for M.2 slot type, keying, and PCIe/NVMe support.

<p>Which SSD offers more storage capacity?</p>

The Intel 660p provides 2TB, compared with 240GB on this Kingston A400 model. That difference strongly favors the Intel for game libraries, media collections, large applications, and substantial file storage. The Kingston can still be sufficient for an operating system and a smaller set of programs, depending on the buyer's storage requirements.

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