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SK hynix

SK hynix Gold P31 Spec and Price in the United States

NVME2TBM.2 22803500 MB/s read

Released August 17, 2021 · $280.00 MSRP

Where the Platinum P41 chases peak throughput, the Gold P31 sits a generation back on PCIe 3.0, capping sequential read at 3,500 MB/s — plenty for mainstream desktops but well short of the PCIe 4.0 drives in this catalog. It still carries a DRAM cache and the SK hynix Cepheus controller, delivering 570,000/600,000 random IOPS at a $280 MSRP that undercuts the Platinum P41's launch price. SK hynix marketed this drive around low power draw, making it a fit for laptop upgrades and thin-and-light builds as much as desktops.

Tied 61st of 106 models in the SSD catalog on Sequential read — 7 models share this figure. 60th of 106 models in the SSD catalog on Sequential write.

Current best price

No tracked price — this page compares specifications alone.

Specifications

Capacity
2TB
Interface
NVME
Sequential read
3500 MB/s
Sequential write
3200 MB/s
Random read
570000 IOPS
Random write
600000 IOPS
PCIe generation
3
Form factor
M.2 2280
NAND type
TLC
DRAM cache
Controller
SK hynix Cepheus controller
Endurance (TBW)
1200 TB
Warranty
5 years

Capacities

ConfigurationPart numberEndurance (TBW)Sequential writeSequential read
500GBSHGP31-500GM-21200 TB3100 MB/s3500 MB/s
1TBSHGP31-1000GM-2———
2TBSHGP31-2000GM-21200 TB3200 MB/s3500 MB/s

Guides for this category

How to choose an SSDFour questions decide almost every SSD purchase — what fits, how big, how fast, and how much it should cost.NVMe or SATAWhich interface your machine takes, how to tell without opening it, and what the speed difference actually buys you.How much SSD capacity you actually needHow to size a drive from what you already use, why leaving headroom matters, and when one bigger drive beats two small ones.M.2 sizes and SSD form factorsWhat 2280, 2242, and 2.5-inch mean, which one your machine takes, and how to check the keying before you buy.What SSD speed numbers actually tell youSequential versus random performance, why the number on the box describes the rarer case, and how to read it without being misled.PCIe generations for SSDsWhat Gen 3, Gen 4, and Gen 5 change, why a newer drive always works in an older slot, and when the extra speed is worth paying for.TLC, QLC, and DRAM-less SSDsWhat the NAND type and the controller's cache change about how a drive behaves, and when either is worth caring about.SSD endurance and warrantiesWhat TBW and DWPD actually promise, how much a normal machine writes, and when endurance is worth paying extra for.How to install an SSDFitting an M.2 or 2.5-inch drive, choosing between cloning and a clean install, and what to check on the first boot.When an SSD price is actually goodWhy price per terabyte beats any discount percentage, and why a good price on one capacity says nothing about the others.

What owners and reviewers say

Summarised from 1 source(s), reviewed September 13, 2026. A source is counted only where it names this model exactly. How we track prices

Commonly praised

  • Excellent real-world and synthetic performance, costing much less than next-generation drives while performing similarly.
  • Excellent sustained write speed with onboard cache and no thermal throttling, under a five-year warranty.

Commonly criticised

  • Only the previous generation of the interface, with a somewhat small cache and a top capacity of 1TB.

Sources behind this summary

Sources

Every spec above was pulled from one of these — a field a source didn't state was left off rather than estimated.