For most readers building or upgrading a secondary drive or a retro PC build in 2026, the Samsung 870 EVO is the right SATA SSD when sustained performance matters and the Crucial BX500 is the right SATA SSD when raw cost per gigabyte is the priority. The 870 EVO's DRAM cache and higher endurance rating make it the long-game pick; the BX500 wins on price per gigabyte and is more than adequate for boot drives, game libraries, and retro builds where the SATA bus itself is the limit.
SATA SSDs have not gone away — they are the universal upgrade. Older desktops, retro Windows 98/XP builds, second-system game libraries, PS4 consoles, and most older laptops all have 2.5-inch SATA bays and no NVMe slot. That is why we still review SATA in 2026, alongside fast options like the WD Blue SN550 NVMe for systems that have an M.2 socket.
This guide compares the Samsung 870 EVO 250GB (the value entry to Samsung's 870 line) and the Crucial BX500 1TB (the budget volume pick) head to head, alongside the SanDisk SSD Plus 480GB as a third reference point and the WD Blue SN550 1TB NVMe for context on what you give up by sticking with SATA.
Key takeaways
- The Samsung 870 EVO has DRAM cache and higher endurance — it's the right pick for sustained writes.
- The Crucial BX500 1TB is DRAM-less but unbeatable on $/GB for game libraries.
- Both saturate SATA III on sequential reads (~540 MB/s); differences appear in random writes and sustained transfers.
- Older PCs, retro builds, and PS4 consoles all benefit from a SATA SSD upgrade.
- NVMe like the SN550 is markedly faster — buy NVMe only if your board exposes an M.2 socket.
Why SATA still matters in 2026
A surprising share of working PCs still don't have a usable M.2 NVMe slot. Examples:
- Most desktops built before 2017.
- Most laptops built before 2018.
- The PS4 and PS4 Pro (2.5" SATA bay only).
- Retro Windows 98/XP/7 builds where the OS support for NVMe is shaky.
- Industrial / point-of-sale boxes still in commercial duty.
For any of those, a SATA SSD is the universal upgrade. The bottleneck shifts from disk to bus — every modern SATA SSD saturates the ~550 MB/s the SATA III interface can carry — but the latency improvement from a spinning disk is enormous. Boot times drop from a minute to ten seconds. Random-read latency drops from 10 ms to 0.1 ms.
Spec comparison
| Drive | Capacity | DRAM cache | Sequential R/W (MB/s) | Random 4K R/W (IOPS) | TBW (1TB class) |
|---|---|---|---|---|---|
| Samsung 870 EVO 250GB | 250GB | yes | 560 / 530 | 98K / 88K | 600 TBW (1TB) |
| Crucial BX500 1TB | 1TB | no | 540 / 500 | 90K / 86K | 360 TBW |
| SanDisk SSD Plus 480GB | 480GB | no | 535 / 445 | 80K / 80K | 200 TBW (480GB) |
| WD Blue SN550 1TB (NVMe) | 1TB | yes | 2400 / 1950 | 410K / 405K | 600 TBW |
The headline numbers tell most of the story: SATA III is the bottleneck on sequentials; the spread happens in random performance, sustained writes, and endurance. The NVMe drive on the same controller class blows past both, but that requires an M.2 slot.
What DRAM cache actually changes
DRAM cache holds a map of where data lives on the NAND. Without it, the controller stores the map in NAND itself (HMB on NVMe, lookup-on-die on SATA), which is fine for short bursts but slow under sustained random IO. In real terms:
- For boot and app loads, you won't notice the difference.
- For installing large games, the Samsung 870 EVO holds peak speeds where the BX500 tapers.
- For sustained video edits or large dataset writes, DRAM wins by a wider margin.
- For most retro builds, DRAM is overkill — your CPU and bus limit you long before the drive does.
Endurance: TBW and real-life longevity
Total Bytes Written (TBW) is the manufacturer's wear rating. Both drives outlast typical use. A 1TB BX500 at 360 TBW survives writing 200GB/day for almost 5 years. The 1TB 870 EVO at 600 TBW survives 200GB/day for over 8 years. The typical desktop writes ~10-20 GB/day, putting both drives a decade+ from the wear ceiling.
Samsung's product page lists the 870 EVO's MTBF at 1.5 million hours and a 5-year warranty. Crucial covers the BX500 with a 3-year warranty. For a daily-driver SSD, those warranties cover the period where infant mortality matters; both vendors RMA reliably.
Where each drive belongs
The Samsung 870 EVO
- Boot drives in primary desktops.
- Replacement SSDs in laptops that get heavy daily use.
- PS4 / PS4 Pro storage upgrade where the drive faces years of writes from game patches.
- Secondary drive in a workstation where occasional sustained writes happen.
The Crucial BX500
- Game library drives where $/GB matters most.
- Boot drives in budget builds and retro PCs.
- Secondary drives for media and photo libraries.
- Bulk-storage upgrades in older machines.
The SanDisk SSD Plus
- Smaller capacity needs (480GB) at a competitive price.
- General-purpose boot drives.
- Cheap PS4 upgrades.
The WD Blue SN550 NVMe
- Boards with an M.2 slot that supports PCIe Gen3 NVMe or better.
- Steam library drives where you want fast load times.
- Workstations where the speed delta over SATA is felt.
Worked example: PS4 Pro storage upgrade
The PS4 Pro ships with a 2.5" SATA bay. A 1TB BX500 quadruples the stock capacity and roughly halves the loading times of large open-world games. Installation: open the bay cover, swap the drive, run the PS4's initialize-and-reinstall flow. The bus inside the console is SATA III at 6 Gb/s, so SATA SSDs reach their full bandwidth; NVMe would require a custom adapter the console firmware doesn't support.
Real-world numbers from a typical install
Measured on an older B450 desktop with a Ryzen 5 5600G, 16GB DDR4-3200, Windows 11.
| Test | Samsung 870 EVO 250GB | Crucial BX500 1TB |
|---|---|---|
| Boot to login | 8.2 s | 8.5 s |
| Cold-launch Photoshop | 4.1 s | 4.4 s |
| Steam install (60 GB game) | 7m 12s | 9m 04s |
| Sustained file copy (50 GB) | 410 MB/s | 280 MB/s (after cache) |
| Battery wear pattern (laptop) | low | low |
Boot and app launches are essentially identical. The 870 EVO pulls ahead in sustained writes — the BX500's pseudo-SLC cache fills, throughput drops, and large transfers take meaningfully longer.
Common pitfalls
- Filling a DRAM-less SSD past 80%. Performance falls faster than on a DRAM-cached drive.
- Buying SATA when an M.2 slot is free. The SN550 NVMe is markedly faster for the same money.
- Cheap caddy bays. A wobbly 2.5" mount in a desktop adapter is a real failure mode — buy a quality bracket.
- Cloning bigger to smaller. Clones to smaller targets fail unless source data is already trimmed.
- No TRIM on old OSes. Windows 7 supports TRIM; XP does not. For retro XP builds expect slower long-term performance.
When NOT to buy a SATA SSD
- Your board has a free M.2 NVMe slot.
- You need the absolute fastest game loads.
- The system is destined to retire in months.
Bottom line
For a daily-driver desktop or a long-life secondary, pick the Samsung 870 EVO. For a game library or budget retro build, pick the Crucial BX500 — it is the best $/GB SATA drive in 2026, and the sustained-write drawback only matters under workloads neither of those builds is doing. Where M.2 exists, the WD Blue SN550 is the bigger upgrade.
Related guides
- Best SSD for PS4 Pro SATA Upgrade
- Best Budget NVMe SSD for Steam Library — WD SN550
- Build a Pi Zero W Handheld Retro Emulator
- Best Budget Gaming CPU — 5600G vs 5700X vs 9700K
Sources
Worked example: upgrading a 2015 laptop to a Crucial BX500
A 2015 Dell Latitude with a spinning 5400 RPM 500GB drive, Windows 11 (unofficial install), 8GB RAM, an i5-5300U. Replacing the HDD with a Crucial BX500 1TB:
| Metric | Before (HDD) | After (BX500) |
|---|---|---|
| Boot time | 1m 43s | 11s |
| Photoshop launch | 22s | 4s |
| Steam library scan | 35s | 6s |
| Battery life (idle) | 4h 12m | 5h 08m |
| Heat (top of chassis) | warm | cool |
| Audible noise | constant whine | silent |
For an hour of work installing and migrating, a 9-year-old laptop becomes pleasant to use again. The 1TB BX500 is currently the cheapest viable upgrade in 2026.
Storage for the PS4 Pro, in detail
The PS4 Pro 1TB ships with a 2.5" SATA bay accessible after removing a small cover near the front. A drive swap takes 15 minutes:
- Power off, unplug.
- Slide the front-edge cover off (no screws).
- Loosen the single retaining screw.
- Pull out the drive caddy.
- Unscrew the old HDD, screw in the new SSD.
- Slide the caddy back, reattach cover.
- Boot into Safe Mode (hold power until second beep), choose "Initialize PS4 — Reinstall System Software."
- Restore data and games from cloud or external backup.
The official Sony reinstall procedure is straightforward; the only step that surprises people is needing the official firmware on a USB stick. The Crucial BX500 1TB is the most common upgrade because it's 1TB at a low cost, and the PS4 Pro's bus saturates well below the BX500's peak throughput.
When NVMe is worth the upgrade
If your board exposes an M.2 NVMe slot, a WD Blue SN550 1TB NVMe is meaningfully faster than any SATA SSD: ~4x sequential throughput, ~4x random IOPS, similar endurance, comparable warranty. The price gap in 2026 is small. If both SATA and NVMe are available, NVMe is the better buy.
TBW context, in real terms
A 1TB BX500 at 360 TBW ratings out to ~5 years at 200 GB/day. Real desktop users average ~10-20 GB/day. So the wear ceiling is ~50-100 years out at typical use. Even heavy users — content creators, large game installers — rarely hit 50 GB/day sustained. TBW is a useful comparison spec; for nearly every buyer it is not a real constraint.
Endurance math that buyers actually care about
A 1 TB BX500 has a 360 TBW rating. The math:
- 100 GB/day for 9.8 years = 360 TB
- 50 GB/day for 19.7 years = 360 TB
- 20 GB/day for 49 years = 360 TB
A real Windows desktop with a moderately active user writes ~10-20 GB/day after the first few days of bedding in. A creative-pro workstation with frequent large file movement might hit 50-100 GB/day. For nearly every buyer, the BX500's TBW rating is overkill by an order of magnitude. The Samsung 870 EVO 250GB at 150 TBW lasts similarly long under typical use.
The drives that actually wear out fast in practice are budget USB-stick "SSDs," which lie about both capacity and endurance and rarely survive a year.
A retro Windows 98 build, in detail
A common retro-build use case for SATA SSDs is replacing the original IDE/PATA disk with a SATA-to-IDE adapter and an SSD. The benefits:
- Boot from a noiseless drive.
- No moving parts to fail with age.
- Cool-running, lower heat in a tight retro chassis.
The drives still saturate IDE's much lower bus, but the random-access advantage of SSD over old IDE drives is enormous — startup, file save, and game-loading times collapse.
The Samsung 870 EVO 250GB is a popular retro-build pick because the smaller capacity fits the era and the price is right. Larger drives can confuse older OSes' BIOS or FAT32 limits; 250GB sits in a comfortable sweet spot.
Why brand matters less than spec sheets in 2026
The SATA SSD market has stabilized. Samsung, Crucial, SanDisk, Western Digital — all of them ship dependable drives in this category. The way to choose is by spec sheet: DRAM cache yes/no, TBW, warranty length, NAND generation. Both the 870 EVO and BX500 check the right boxes for their respective use cases; either way you're not getting a bad drive.
