Crucial BX500 vs Samsung 870 EVO for Budget & Retro Builds

For a budget boot drive or modern Steam library secondary, the Crucial BX500 1TB wins on price per gigabyte and is genuinely fine. For sustained writes, a write-heavy scratch role, or a long-life endurance bet, the Samsung 870 EVO is worth the premium thanks to its DRAM cache. For retro Windows 98/XP builds, either drive blows the SATA II controller's ceiling open — pick the cheaper one.

Step 0: identify your bottleneck

Before you pick between the two, answer one question: where is the friction in your current build?

• Boot speed feels slow. Either drive solves it. Both are ~7× faster than a 7200 RPM platter on cold-boot scenarios and ~3× faster on application-launch latency. Buy whichever is cheaper per gigabyte at your target capacity.
• Game-load times feel slow on a SATA-bound system. Both drives push close to the SATA III ceiling for sequential reads. Game-load improvements are dominated by the SATA bus, not the drive choice. Either is fine.
• You move large files frequently. This is the case where DRAM matters. Sustained write performance on the DRAM-less BX500 collapses to QLC-like speeds after the SLC cache fills, while the DRAM-cached 870 EVO holds its line.
• Retro PC build with a period-correct OS. The SATA II or SATA I controller on the era's motherboard caps both drives well below their potential. Pick the cheapest reliable option.

The budget SATA SSD decision in 2026

The interesting thing about 2026's budget SATA SSD market is that nothing has fundamentally changed in five years. The Crucial BX500 launched in 2018 and is still in production with refreshed NAND. The Samsung 870 EVO launched in 2021 as the successor to the legendary 860 EVO, and Samsung hasn't replaced it because there's no reason to — SATA III is a stable, well-understood ceiling, and the only way to go faster is to leave SATA entirely for NVMe.

That stability is exactly why the BX500 vs 870 EVO question matters today. NVMe is the right answer for new high-end builds, but a giant slice of real-world buyers don't have an M.2 slot, don't want to retire a working SATA build, or are restoring a vintage system where SATA is the only option. For that slice — modern budget desktops without M.2, older laptops, NAS-style secondary storage, and retro PC builds — SATA is still the right interface, and the BX500 vs 870 EVO question is the closest thing to a universal one.

The split between the two drives is also clean: one is a DRAM-less budget pick (BX500), the other is a DRAM-cached mid-tier pick (870 EVO). Understand what DRAM does for an SSD and the choice becomes a sentence-long flowchart, not a 14-tab spec sheet.

The other two drives in this segment — the WD Blue 3D NAND and the SanDisk SSD Plus — slot in as variants of the same two archetypes. The WD Blue is DRAM-equipped and competes with the 870 EVO. The SanDisk Plus is DRAM-less and competes with the BX500. We'll cover both in the perf-per-dollar section so you can cross-check whichever is cheapest the day you buy.

Key takeaways

• The BX500 is DRAM-less; the 870 EVO has DRAM. That's the single most important spec gap.
• For boot drives and game library secondaries, the everyday user-perceived speed gap is small. Both drives saturate SATA III on sequential reads.
• For sustained writes (large file copies, video editing scratch, backup target), the 870 EVO holds its speed; the BX500 throttles after the SLC cache fills.
• For retro Windows 98/XP builds on SATA II controllers, either drive massively exceeds the bus ceiling. Pick the cheaper one.
• The WD Blue 3D NAND and SanDisk SSD Plus are reasonable cross-shop options. Compare per-GB pricing on the day you buy.
• The 870 EVO's endurance rating (TBW) is meaningfully higher than the BX500's. For write-heavy roles, that's the real long-term differentiator.

Spec-delta table

Sourced from each drive's product page and TechPowerUp's BX500 spec page.

The headline numbers are close on sequential, but the gap on endurance and DRAM is real. A 1TB 870 EVO's 600 TBW rating is 1.67× the BX500's 360 TBW, with a 5-year warranty against the BX500's 3-year. For a write-heavy role those numbers matter; for a mostly-read role they don't.

Sustained writes: DRAM-less BX500 vs DRAM-cached 870 EVO

The single most-tested SSD behavior in reviews is the sustained-write cliff. Both drives use an SLC cache — a portion of the TLC flash temporarily used as faster single-level cells — to absorb the first chunk of incoming writes at full SATA III speed. Once that cache fills, the drive flushes to the underlying TLC. That's where the two diverge.

Per Tom's Hardware's 870 EVO review, the DRAM-cached design holds ~530 MB/s sustained for the duration of the SLC cache (around 40 GB on the 250GB model, around 75 GB on the 1TB), then drops to ~330 MB/s as it transitions to TLC writes. That's still respectable.

The BX500's sustained-write profile is rougher. As a DRAM-less drive, it leans on the Host Memory Buffer (HMB) feature for FTL caching, which is fine for short bursts but doesn't recover the same way under prolonged load. The SLC cache holds ~540 MB/s for ~30 GB on a 1TB BX500, then drops to ~200–250 MB/s, and prolonged writes can dip into double-digit MB/s territory as the controller catches up with garbage collection.

The practical implication: copying a 50GB Steam game install over from a backup drive will start fast on both, finish near full SATA III speed on the 870 EVO, and noticeably slow on the BX500 in the last half. For a boot drive or a mostly-read role, this never matters. For a backup target, scratch disk, or active-edit storage, it does.

Which is the smarter pick for a retro Windows 98/XP boot drive?

The retro PC case is the easiest one. A Windows 98 or XP build on a period-correct motherboard runs SATA II at best, and in many cases SATA I or a parallel-ATA controller via SATA-to-IDE adapter. The SATA II ceiling is ~300 MB/s; SATA I is ~150 MB/s; IDE adapter chains run lower still.

Both the BX500 and 870 EVO are 540 MB/s drives. Either one will be limited by the bus, not by the drive. Pick the cheaper one.

The two real considerations on a retro build are:

1. Capacity alignment to era expectations. Windows 98 doesn't need 1TB; you'll spend the rest of your life filling 64GB. A 250GB 870 EVO is more than enough and may actually be the smarter pick for matching era-correct partition sizes without hacky workarounds.
2. Controller recognition. Some very old chipsets stumble on modern SSDs that report TRIM/4K-alignment hints incompatibly. Both drives behave well on Intel ICH7/ICH9-era chipsets and on the common AMD SB-series controllers; the FreeDOS and Win98SE communities have years of compatibility confirmations on each.

For a deeper take on period-correct retro storage, see our retro PC storage guide and the Windows 98 boot drive comparison.

Which is the smarter pick for a modern Steam library secondary?

The modern budget desktop case rewards capacity. A 1TB BX500 holds 12–18 modern AAA installs; a 250GB 870 EVO holds 3–4. If you're shopping the secondary game library role:

• Buy the 1TB BX500 when you want the most installed games per dollar and you've already got an NVMe boot drive. Steam libraries are mostly-read once a game is installed, and the BX500's sustained-write weakness shows up only on big install batches.
• Buy the 1TB 870 EVO when you actively rotate the library — installing/uninstalling weekly, big patches, Cloud sync churn — and the extra endurance + DRAM is worth the ~$15–$30 premium.

The fringe case is a single-drive budget desktop where the SATA SSD is both the boot drive and the game library. There, the 870 EVO's DRAM and endurance buy meaningful daily-life consistency: app launches feel snappier and big game patches don't tank the rest of the system.

Perf-per-dollar math: where the WD Blue and SanDisk SSD Plus fit

The BX500 wins on $/GB at the 1TB tier — by a wide margin. The 870 EVO wins on endurance and warranty. The WD Blue is the "compromise" pick: DRAM cache and TLC NAND at a middle price. The SanDisk SSD Plus is closest to the BX500 in character: DRAM-less, budget-tier, perfectly fine for boot and library roles.

Cross-shop all four on the day you buy. Prices on these four oscillate by $10–$20 across vendors and weeks. The "best value" winner is whichever is cheapest at the capacity you actually need.

Common pitfalls to avoid

• Buying a 240/250GB BX500 expecting endurance to scale linearly. Smaller capacities = smaller endurance. The 240GB BX500 is rated 80 TBW, not 360.
• Cloning a worn-out drive onto a brand-new SSD without TRIM enabled. Modern OSes handle this automatically, but old WinXP installs may need manual TRIM enablement to keep the drive performant long-term.
• Buying SATA when the system has an M.2 slot. If your motherboard has an unused M.2 slot, a budget NVMe drive (Crucial P3, WD Blue SN570) often costs the same and runs 5–7× faster. SATA is the right answer only when M.2 is not on the table.
• Ignoring power-loss protection on a backup target. Neither drive has enterprise-grade power-loss protection. For a critical backup role, a UPS upstream is cheap insurance.
• Mismatching capacity to use. A 1TB drive is overkill for a Windows 98 retro build; a 250GB drive is too tight for a modern Steam library secondary.

When NOT to buy either

If your build has any M.2 NVMe slot available and you don't need SATA specifically, skip both and buy a budget NVMe. A Crucial P3 1TB or a WD Blue SN570 1TB will run 5–7× faster on sequential and 3–5× faster on random for the same money. SATA SSDs are the right tool only when M.2 is unavailable, when you're restoring a vintage system, or when you have multiple existing SATA bays you want to fill out cheaply.

Verdict matrix

Get the BX500 if:

• You want maximum capacity per dollar
• The role is a boot drive or secondary library on a modern budget desktop
• You're not running sustained heavy writes
• The system is a retro build where the bus caps performance anyway

Get the 870 EVO if:

• You write to the drive heavily (scratch disk, video editing, frequent big patches)
• You want the longer 5-year warranty and 600 TBW endurance
• You're running it as a primary in a single-drive system
• The price gap to the BX500 at your target capacity is under ~$15–$20

Recommended pick

For most budget builds in 2026, the Crucial BX500 1TB is the default recommendation. It's the cheapest legitimate path to "fast enough" SATA storage, and the workloads where its DRAM-less design hurts (sustained writes) are the workloads most buyers don't run. For users who do run sustained writes — content creators with active edit scratch disks, frequent large file movers, or single-SSD systems where consistency matters every day — the Samsung 870 EVO 1TB earns its premium with DRAM cache, higher endurance, and a longer warranty.

For retro PC builds specifically, see the retro PC storage guide.

Related guides

• Best Storage for a Retro PC Build in 2026
• Best SATA SSD for Gaming in 2026
• Period-Correct Windows 98 Boot Drive: CompactFlash vs IDE SSD
• Sound BlasterX G6 for Retro Windows XP USB Audio
• Raspberry Pi 4 8GB Jellyfin Media Server

Citations and sources

• TechPowerUp — Crucial BX500 1TB spec page
• Tom's Hardware — Samsung 870 EVO SATA SSD review
• Crucial — BX500 official product page

This piece is editorial synthesis based on publicly available information. No independent first-party benchmarking is reported.