Relative Value16balanced preset
Crucial BX500 4TB vs Western Digital Blue SA510 4TB — value comparison
Relative Value17balanced preset
Crucial BX500 4TB and Western Digital Blue SA510 4TB are practically even under balanced weights at the current dataset offers: 16 vs 17. Change the preset or your priorities before deciding.
Price data · US · USD · New · A 2026-09-06 · B 2026-09-06Coverage · 5 tracked new-offer records across both modelsBenchmark confidence · no estimate flags on these two recordsAffiliate links · We may earn a commission from these links. Scores are calculated separately using our methodology.
02 · Decision matrix
One decision, three separate questions
Capability ignores price. Relative Value adds the current dataset offers and your priorities. Keeping them separate prevents a cheap product from being mistaken for the faster product.
The decision, split by questioncapability · value · price are separate answers
Capability by task
| Scenario | Crucial BX500 4TB | Western Digital Blue SA510 4TB |
|---|---|---|
| System Drive | A#163 | A#152 |
| Game & File Storage | S#14 | S#41 |
| Heavy Creative Work | B#171 | B#170 |
They grade identically in all 3 graded scenarios — the tier table won't decide this one, so compare price and Value below. These are the same S–F grades as the tier list — capability only, price excluded. The value rows below add prices from the 2026-09-06 offer frame. How tiers are assigned →
Relative Value by priority
Balancedpractically even (≤3 pts)
16
17
System Drivepractically even (≤3 pts)
0
1
Game & File Storagepractically even (≤3 pts)
64
65
Heavy Creative Workpractically even (≤3 pts)
0
0
Strict Budgetpractically even (≤3 pts)
27
27
Both products are normalized within the same in-stock market frame per preset. A check marks the higher Relative Value; a difference of 3 points or less is shown as practically even.
03 · Price crossover
The price changes the answer
Current offers, crossover points and Strong Value thresholds answer different questions. Thresholds are calculations, not price forecasts.
A · Crucial BX500 4TB
- Current dataset offer · NewUS · USD · snapshot 2026-09-06
- $490
- Beats Western Digital Blue SA510 4TB atbalanced weights; rival offer held fixed
- $434
- Strong Value at80+ Relative Value threshold
- $49
B · Western Digital Blue SA510 4TB
- Current dataset offer · NewUS · USD · snapshot 2026-09-06
- $500
- Beats Crucial BX500 4TB atbalanced weights; rival offer held fixed
- $565
- Strong Value at80+ Relative Value threshold
- $56
04 · Where to buy
Current offers for both products
Dated New-condition price snapshots for only the two products in this comparison. Confirm the final price and availability at the store.
A · Crucial BX500 4TB
New · US · USDAmazon Affiliate
Check on Amazon
B · Western Digital Blue SA510 4TB
New · US · USDAmazon Affiliate
Check on Amazon
05 · Capability
Capability indexes, side by side
Price is intentionally excluded here so the more capable product and the better-value product cannot be confused.
Drive capability
540
560
560
Sequential read (MB/s)
540
560
560
Sequential write (MB/s)
500
520
520
A · Crucial BX500 4TBB · Western Digital Blue SA510 4TBEach row keeps the unit or category index named in its label; bar length compares A and B within that row.The Value leader depends on how you weight things: Crucial BX500 4TB leads under 0 presets, Western Digital Blue SA510 4TB under 0, 5 practically even.
06 · Platform & ownership
Fit, compatibility and ownership context
Only verified structured compatibility and ownership fields are shown. Check the exact system, board manual and vendor QVL before purchase; missing fields are never guessed.
A · Crucial BX500 4TB
- InterfaceSATA 6.0 Gb/s
- Form factor2.5"
- Capacity4,000 GB
- DRAM cacheDRAM-less
- Heatsink includedNo
- Write endurance1,440 TBW
- Warranty (typical new)60 mo
B · Western Digital Blue SA510 4TB
- InterfaceSATA 6.0 Gb/s
- Form factor2.5"
- Capacity4,000 GB
- DRAM cache4GB LPDDR4
- Heatsink includedNo
- Write endurance2,400 TBW
- Warranty (typical new)60 mo
07 · Specifications
Key specifications
Directional checkmarks appear only on numeric fields where more or less has a clear meaning. They are not an overall verdict.
| Specification | Crucial BX500 4TB | Western Digital Blue SA510 4TB |
|---|---|---|
| Interface | SATA 6.0 Gb/s | SATA 6.0 Gb/s |
| Form factor | 2.5" | 2.5" |
| Capacity | 4,000 GB | 4,000 GB |
| Sequential read | 540 MB/s | 560 MB/s✓ |
| Sequential write | 500 MB/s | 520 MB/s✓ |
| Write endurance | 1,440 TBW | 2,400 TBW✓ |
| DRAM cache | DRAM-less | 4GB LPDDR4 |
| NAND type | Micron 3D QLC/TLC | SanDisk 3D TLC |
| Controller | SMI SM2258XT | Marvell 88SS1074 |
| Heatsink included | No | No |
| Current dataset offer · New | $490snapshot 2026-09-06✓ | $500snapshot 2026-09-06 |
| Warranty (typical new) | 60 mo | 60 mo |
“Not tracked” means the source data does not contain a verified value; no default or guessed specification is substituted.
08 · Customize
Try other models and your own priorities
Presets are starting points. Swap either side, then open Advanced weights only if you want to tune the formula directly.
09 · Alternative
A third option worth checking
The same scenario and market frame checks whether another currently priced model offers a cleaner trade-off.
Worth considering instead
Crucial T710 1TB — same S-tier capability for System Drive, about $280 cheaper · Value 100.
Neither of the two above is the only answer — this one clears the same bar for less. ⇄ Compare all three
10 · Decision guide
Choose based on the trade-off you actually want
These are evidence-linked conditions, not universal buying verdicts. Feature ecosystems, software support and platform preferences remain your call.
Choose A · Crucial BX500 4TB if…
- You can find it at or below its Strong Value threshold of $49 under balanced weights.
Choose B · Western Digital Blue SA510 4TB if…
- You can find it at or below its Strong Value threshold of $56 under balanced weights.
11 · Methodology & FAQ
Read the methodology →How to read this comparison
The formula is a linear weighted sum inside the current comparison frame. Capability, price and user priorities stay visible as separate inputs so the result can be challenged and changed.
- Which is better value right now: Crucial BX500 4TB or Western Digital Blue SA510 4TB?
- Under the balanced preset and the 2026-09-06 offer frame, they are practically even in Relative Value (16 vs 17). Change the preset or weights to reflect your own priorities; capability is a separate question, answered by the tier table.
- Which one is more capable, ignoring price?
- They grade identically in all 3 graded scenarios — the tier table won't decide this one, so compare price and Value below.
- Where can I compare current offers for both?
- Dated offer snapshots for both models are listed on their product pages (linked above); the interactive calculator recalculates both with your own weights and budget.
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Offer frame: 2026-09-06 · dataset generated 2026-09-06 · formula ssd-value-v1.5-benefit-cost-product · Value Score is an estimate based on our current dataset, selected weights, market prices and methodology — not an official product rating or a price forecast. Target prices are calculation thresholds, not predictions. Methodology · Report a data error