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Black rectangular 2.5 inch SATA SSD with silver label and Samsung branding

SAMSUNG

SAMSUNG 850 EVO 1TB 2.5" SATA internal SSD

SKU CH-9AHR-20BY2

A 1 TB 2.5 inch SATA solid state drive delivering up to 540 MB/s read and 520 MB/s write speeds with V-NAND 3bit MLC memory and 256-bit encryption

  • Total capacity1 TB
  • Sequential read speedUp to 540 MB/s
  • Sequential write speedUp to 520 MB/s
  • Interface typeSATA-6 Gbit/s
  • Form factor2.5 in (6.35 cm)
  • Product typeInternal Solid State Drive (SSD)
  • Up to 540 MB/s sequential read for fast boot and load times
  • Up to 520 MB/s sequential write for quick file saves
  • 98,000 IOPS random read at QD32 for responsive multitasking
  • 256-bit encryption standard protects stored data
  • 1500G shock resistance guards against drops and vibration

Built for everyday computing

The Samsung 850 EVO is a 2.5 inch internal solid state drive with a capacity of 1TB. It uses V-NAND 3bit MLC memory and a Samsung MGX controller. The drive is intended for consumer workloads such as operating system boot, application loading and general file storage.

SATA 6Gbps interface limits

The drive connects through a SATA 6Gbps interface, which caps sequential throughput at the bus maximum. Rated sequential read reaches up to 540 MBps and sequential write up to 520 MBps. Random read performance is up to 98,000 IOPS at queue depth 32 and up to 10,000 IOPS at queue depth 1. Random write reaches up to 90,000 IOPS at queue depth 32 and up to 40,000 IOPS at queue depth 1.

Capacity and endurance headroom

With 1TB of usable space the drive holds an operating system, a large application library and extensive media files with room to spare. Active power draw averages 3.1W and peaks at 3.6W. The drive includes 256-bit encryption and is rated for 1500G shock resistance and 20G vibration resistance across a 20 to 2000Hz range.

How it compares

Measured against everything we stock in Internal NVMe & SATA SSDs, at today’s prices. Recalculated every night.

Price $273.99
Pricier than about 65% of the 1,994 comparable items (median $180.49).
Total capacity 1 TB
Typical for this category: the median of 1,368 items is 1 TB.
Sequential read speed Up to 540 MB/s
Lower than about 83% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $273.99 per TB
Pricier than about 73% of the 1,362 comparable items (median $165.50 per TB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSAMSUNG
Product line850 EVO
Total capacity1 TB
Product typeInternal Solid State Drive (SSD)
Intended useConsumer
Performance
Sequential read speedUp to 540 MB/s
Sequential write speedUp to 520 MB/s
Random read (4K)Up to 98,000 IOPS (4 KB, QD32)
Up to 10,000 IOPS (4 KB, QD1)
Random write (4K)Up to 90,000 IOPS (4 KB, QD32)
Up to 40,000 IOPS (4 KB, QD1)
Storage
NAND flash typeV-NAND 3bit MLC
Controller chipSamsung MGX Controller
Ports & slots
Interface typeSATA-6 Gbit/s
Power
Active power draw3.1 W / 3.6 W (Average / Max)
Size & build
Form factor2.5 in (6.35 cm)
Environment & compliance
Max shock tolerance1500G, Duration 0.5m Sec, 3 Axis
Vibration tolerance20 to 2000 Hz, 20G

Questions about this item

Should I choose the 1TB version or a smaller capacity for my upgrade?

The 1TB model delivers up to 540 MB/s read and 520 MB/s write with 98,000 IOPS random read at QD32, giving you the highest performance tier in the 850 EVO line.

What do the 540 MB/s read and 520 MB/s write speeds mean once the drive is installed in my laptop?

Those are the maximum sequential transfer rates the MGX controller can sustain over the SATA 6Gbps link; real-world file copies and game loads will sit close to those numbers when the queue depth is high.

Does the SATA 6Gbps interface cap the drive's performance in practice?

The SATA 6Gbps bus tops out near 600 MB/s, so the rated 540/520 MB/s sequential speeds already sit at the interface limit; random 4K performance reaches 98,000 read and 90,000 write IOPS at QD32.

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