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Component guide

Drive speeds, from hard drives to PCIe 5.0

What SSD and hard drive speed numbers mean, the difference between sequential and random performance, why a PCIe 5.0 drive barely changes game loading, and how much storage a gaming PC actually needs.

The short version

A 2 TB PCIe 4.0 NVMe drive with its own DRAM cache. Faster drives cost more for very little in games, and a hard drive should never hold your operating system or your games.

Storage is where the marketing numbers are furthest from the lived experience. A drive advertised at twice the speed of another will usually load a game somewhere between zero and fifteen percent faster, because the advertised number measures something games barely do.

The upside is that this makes storage the easiest place to save money sensibly, as long as you spend it on capacity and on the right class of drive rather than on the biggest number.

How to pick

Answer these, in this order.

Each question narrows the field. By the last one there is usually only one sensible answer left, and it is often cheaper than where you started.

  1. How much space do you need?

    More than you think. Single modern installs run past 100 GB and a few exceed 200 GB. 1 TB fills up fast. 2 TB is the sensible default for a gaming build, and 4 TB if you keep a large library installed.

  2. Does the drive have its own DRAM cache?

    This separates a good drive from a cheap one at the same advertised speed. Drives without it borrow system memory and slow down badly once they are more than about seventy percent full, which is exactly when you notice.

  3. What is the endurance rating?

    Written as TBW, terabytes written. For gaming it almost never becomes the limit, but a suspiciously low figure is a reliable signal of a cheaply built drive using low grade flash.

  4. Do you need PCIe 5.0?

    Almost certainly not, for games. If you routinely move hundreds of gigabytes at once for video work, yes. Otherwise put the money in capacity and buy a PCIe 4.0 drive twice the size.

  5. Is there a hard drive anywhere in the quote?

    If a builder is quoting a hard drive as your main drive in 2026, that is a red flag about the whole quote. A hard drive is a fine archive and a terrible game library.

The ladder

Drives by tier, top to bottom.

Every tier here is a real answer for a real person. Lineup reviewed September 2026. Prices shown are launch MSRP, which is a fixed fact. Street prices move, so every product links to a live search.

Enthusiast

PCIe 5.0, around 14,000 MB/s

Genuinely useful if you move very large files regularly. In games it is close to indistinguishable from the tier below, and it runs hot enough to need real cooling.

Who it is for
High refresh at 1440p, or a serious run at 4K, with headroom to spare.
The tradeoff
Most of the halo experience for a meaningful discount, and the tier where power draw and cooling start to drive the rest of the build.

Various

PCIe 5.0 NVMe SSD, 2 TB

Enthusiast

Sequential read speeds around 14,000 MB/s, which is roughly double a PCIe 4.0 drive on paper. In games the difference is small, because game loading is mostly random reads and decompression, not one long sequential transfer.

Best for
Moving very large files often, or a build where you want the fastest slot filled properly.
Watch out
These drives run hot enough to need the motherboard heatsink, and some need active airflow. Pay the premium for the transfer speeds you actually use, not for the number on the box.
Interface
PCIe 5.0 x4, M.2 2280
Sequential read
Around 14,000 MB/s
What it changes in games
A little. Seconds, not tens of seconds
Cooling
Heatsink required
Midrange

PCIe 4.0, around 7,000 MB/s, 2 TB

The correct default. Fast, cool, affordable at 2 TB, and the drive that goes in nearly every build we quote.

Who it is for
The sweet spot. High refresh 1440p, comfortable 1080p, workable 4K with upscaling.
The tradeoff
The best frames per dollar most years. Long-tail owners upgrade here again in three or four years rather than never.

Various

PCIe 4.0 NVMe SSD, 2 TB

Midrange

The correct default for a gaming build. Around 7,000 MB/s sequential, excellent random performance, cool enough to ignore, and priced where 2 TB is affordable. This is the drive that goes in almost every quote we write.

Best for
The boot drive and game library in any build.
Watch out
Check that it has its own DRAM cache. The cheapest drives at this speed do not, and they slow down badly once you fill them past about seventy percent.
Interface
PCIe 4.0 x4, M.2 2280
Sequential read
Around 7,000 MB/s
Cache
Look for DRAM cache, not host memory buffer
Good capacity
2 TB. Modern installs are 100 GB and up
Value

SATA SSD, capped at about 550 MB/s

Limited by the interface rather than the flash, and still enormously better than any hard drive at the random reads that cause loading screens. Good bulk storage.

Who it is for
Solid 1080p at high refresh, 1440p if you are willing to move a slider.
The tradeoff
Buys most of the playable experience for a fraction of the top. Usually the first tier where memory capacity starts to limit longevity.

Various

SATA SSD, 4 TB

Value

Capped at about 550 MB/s by the SATA interface itself, and still roughly a hundred times quicker than a hard drive for the random reads that actually cause loading screens. Cheap bulk storage that never spins up.

Best for
A second drive for a large library you do not want to redownload.
Watch out
Do not use it as the boot drive in a new build. NVMe costs about the same per terabyte at 2 TB and is far faster.
Interface
SATA III, 2.5 inch
Sequential read
About 550 MB/s, an interface limit
Random reads
Far better than any hard drive
Use
Secondary library drive
Budget

Hard drive, around 200 MB/s and poor at random reads

The cheapest place to store a lot of data you rarely touch. The wrong place for an operating system or a game, and in 2026 putting games here is the cause of complaints people blame on their graphics card.

Who it is for
Esports titles, older libraries, a first build, or a machine that shares duty with schoolwork.
The tradeoff
Real limits at high settings in new releases. The honest version of this tier says which games it will not run well, and this one does.

Various

7200 RPM hard drive, 8 TB

Budget

Spinning platters are still the cheapest place to keep a lot of data, and they are still the wrong place to keep a game or an operating system. Around 200 MB/s sequential and terrible at random reads because a physical head has to move.

Best for
Recordings, archives, backups, and anything you touch rarely.
Watch out
Installing games here in 2026 causes the long loading screens and texture pop-in people blame on their graphics card. Check what a shop is quoting you before you sign.
Interface
SATA III, 3.5 inch
Sequential read
About 200 MB/s
Random reads
Poor. This is the part that matters
Use
Archive and backup only

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Sequential speed is on the box. Random speed is what you feel.

Sequential read speed measures one long continuous transfer, like copying a single enormous file. It is the number every manufacturer prints, because it is the biggest one available.

Random read performance measures thousands of small scattered reads. Loading a game level, launching an application, and booting Windows are all overwhelmingly random work. This is the number that determines how fast the machine feels, and it is not on the front of the box.

That is why an SSD feels transformative next to a hard drive, which has to physically move a head for every scattered read, and why one SSD does not feel transformative next to another SSD. The enormous win already happened at the switch from spinning platters.

ClassSequential readRandom readsRight job
Hard drive, 7200 RPMAbout 200 MB/sVery poorArchive and backup
SATA SSDAbout 550 MB/sGoodBulk game library
PCIe 3.0 NVMeAbout 3,500 MB/sVery goodStill perfectly usable
PCIe 4.0 NVMeAbout 7,000 MB/sExcellentBoot drive and games
PCIe 5.0 NVMeAbout 14,000 MB/sExcellentLarge file work
The gap between the first two rows is life-changing. The gap between the last two rows is a few seconds on a loading screen.

Why doubling the drive speed does not halve the loading screen

Loading a level is not just reading data. It is reading compressed data, decompressing it, building structures in memory, and compiling shaders. Only the first of those steps gets faster when you buy a faster drive, and it is often not the slowest step.

DirectStorage, which lets the graphics card handle decompression directly, is the technology designed to remove that bottleneck, and where a game supports it a fast NVMe drive does more work. Support is still patchy, so treat it as an upside rather than a reason to buy.

A sensible drive layout

One 2 TB NVMe drive for Windows and your current games covers most people completely. If you keep a very large library, add a second NVMe or a SATA SSD for the games you are not currently playing, and move things between them.

Add a hard drive only for archives, recordings, and backups. And an external copy of anything you would be upset to lose, because a drive in the same case as everything else is not a backup.

Next step

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