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WD Blue SN580 8TB — PCIe 4.0 · 4150/4150 MB/s · 2TB
Western Digital

WD Blue SN580 8TB

PCIe 4.0 · 4150/4150 MB/s · 2TB

86
/ 100
From $792
VS
Samsung 990 Pro 4TB — PCIe 4.0 · 7450/6900 MB/s · 4TB
Samsung

Samsung 990 Pro 4TB

PCIe 4.0 · 7450/6900 MB/s · 4TB

86
/ 100
From $360
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, WD Blue SN580 8TB lands at 86 and Samsung 990 Pro 4TB at 86. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick WD Blue SN580 8TB if…

  • ✓M.2 NVMe
  • ✓Competitive per-GB cost
  • ✓TBW scales with capacity

Pick Samsung 990 Pro 4TB if…

  • ✓M.2 NVMe
  • ✓Competitive per-GB cost
  • ✓TBW scales with capacity
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Endurance & reliability

Tie

Write endurance and long-term dependability

Effectively tied — neither pulls a 2-point weighted lead.

Value for money

Samsung 990 Pro 4TB

Specdex score per dollar at MSRP

Samsung 990 Pro 4TB more score per dollar ($360 vs $792).

WD Blue SN580 8TB 86
vs
86 Samsung 990 Pro 4TB

Score breakdown

WD Blue SN580 8TB
86
read 90
write 88
endurance 88
value 84
Samsung 990 Pro 4TB
86
read 90
write 88
endurance 88
value 84

Specs side-by-side

WD Blue SN580 8TB versus Samsung 990 Pro 4TB — full spec comparison
Spec WD Blue SN580 8TB Samsung 990 Pro 4TB
Interface
PCIe 4.0
PCIe 4.0
Capacity
▲ 8TB
4TB
Read/Write
4150/4150 MB/s
7450/6900 MB/s

WD Blue SN580 8TB

Pros
  • +M.2 NVMe
  • +Competitive per-GB cost
  • +TBW scales with capacity
Cons
  • −Thermals on Gen 5 drives
  • −DRAM-less models slower under sustained load
  • −Require heatsinks in many systems

Samsung 990 Pro 4TB

Pros
  • +M.2 NVMe
  • +Competitive per-GB cost
  • +TBW scales with capacity
Cons
  • −Thermals on Gen 5 drives
  • −DRAM-less models slower under sustained load
  • −Require heatsinks in many systems

FAQ: WD Blue SN580 8TB vs Samsung 990 Pro 4TB

Which is better, WD Blue SN580 8TB or Samsung 990 Pro 4TB? +

Both score 86 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is WD Blue SN580 8TB worth the price? +

At $792, WD Blue SN580 8TB delivers a Specdex score of 86 — strongest in read.

Is Samsung 990 Pro 4TB worth the price? +

At $360, Samsung 990 Pro 4TB delivers a Specdex score of 86 — strongest in read.

Does WD Blue SN580 8TB or Samsung 990 Pro 4TB last longer? +

Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.

Which is the better value, WD Blue SN580 8TB or Samsung 990 Pro 4TB? +

Samsung 990 Pro 4TB — more score per dollar ($360 vs $792). Specdex score per dollar at MSRP.