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ADATA XPG Gammix S70 vs Samsung 990 PRO: Comparison
ADATA XPG Gammix S70 vs Samsung 990 PRO sequential write compared
The gap that matters here is sequential write: ADATA XPG Gammix S70 6400 MB/s against Samsung 990 PRO 6900 MB/s, which puts Samsung 990 PRO 7% ahead.
Which should you buy, ADATA XPG Gammix S70 or Samsung 990 PRO?
Take the ADATA XPG Gammix S70 for desktop gaming builds with clear M.2 heatsink clearance wanting maximum sustained performance. The larger heatsink here does real thermal work under extended load. It is equally the pick for buyers who already compared this to the S70 Blade and have the case clearance to use the bigger cooler. It is not the one for slim laptops, handhelds, or motherboards with tight M.2 shrouds. The ADATA XPG Gammix S70 Blade, covered elsewhere on this site, is built for exactly that constraint. Take the Samsung 990 PRO for gen 4 systems that need strong random performance, not just headline sequential numbers. It also earns its place with PS5 expansion, where the single-sided 2280 layout and heatsink option fit Sony's rules exactly. It is the wrong buy for sustained multi-hundred-gigabyte writes. The 226GB cache runs out and the SN850X holds nearly three times as much. Our rating of the ADATA XPG Gammix S70 (8.3/10): A genuine PCIe 4.0 flagship let down only by needing more physical clearance than some builds have to spare. Our rating of the Samsung 990 PRO (8/10): still the best-engineered PCIe 4.0 drive. The 2026 price is the only reason to look elsewhere, and right now it is a good reason.
Frequently asked questions
Do the ADATA XPG Gammix S70 and Samsung 990 PRO differ on sequential read?
Yes. Sequential Read reads 7400 MB/s on the ADATA XPG Gammix S70 versus 7450 MB/s on the Samsung 990 PRO.
Is the Warranty the same on the ADATA XPG Gammix S70 and Samsung 990 PRO?
It is. Both are listed at 5 Years, so it is not a reason to pick one over the other.
Specs and benchmarks
Speed Score
- ADATA XPG Gammix S70
- 8.4/10Best
- Samsung 990 PRO
- 8.4/10Best
How fast this drive is, rated from its read and write speeds, cache and NAND type. 10 is the fastest.
Brand
- ADATA XPG Gammix S70
- ADATA
- Samsung 990 PRO
- Samsung
Model Number
- ADATA XPG Gammix S70
- Gammix S70
- Samsung 990 PRO
- 990 PRO
Series
- ADATA XPG Gammix S70
- XPG Gammix S70
- Samsung 990 PRO
- 990 PRO
Bus Interface
- ADATA XPG Gammix S70
- PCIe 4.0 x4, NVMe
- Samsung 990 PRO
- PCIe 4.0 x4
Sequential Read
- ADATA XPG Gammix S70
- 7400 MB/s-1%
- Samsung 990 PRO
- 7450 MB/s
Sequential Write
- ADATA XPG Gammix S70
- 6400 MB/s-7%
- Samsung 990 PRO
- 6900 MB/s
NAND Type
- ADATA XPG Gammix S70
- TLC with DRAM Cache
- Samsung 990 PRO
- Samsung V-NAND TLC
Heatsink
- ADATA XPG Gammix S70
- Included (Large Aluminum Fin Array)
- Samsung 990 PRO
- Available
Warranty
- ADATA XPG Gammix S70
- 5 Years
- Samsung 990 PRO
- 5 Years
Which one should you pick?
Choose ADATA XPG Gammix S70 if you already have it on hand or find it at a lower price.
Choose Samsung 990 PRO if you want the higher sequential read (7450 MB/s vs 7400 MB/s) and the higher sequential write (6900 MB/s vs 6400 MB/s).
Price comparison
| Retailer | ADATA XPG Gammix S70 | Samsung 990 PRO |
|---|---|---|
| Amazon | View on Amazon | $385.27 View on Amazon |
| Newegg | View on Newegg | View on Newegg |
| B&H Photo | View on B&H Photo | |
| Best Buy | View on Best Buy |
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Verdict
ADATA XPG Gammix S70
8.3 / 10 Expert Rating
A genuine PCIe 4.0 flagship let down only by needing more physical clearance than some builds have to spare.
Samsung 990 PRO
8 / 10 Expert Rating
Still the best-engineered PCIe 4.0 drive.
More comparisons in SSDs
Compare ADATA XPG Gammix S70 with
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- ADATA XPG Gammix S70 vs Acer Predator GM7000 (IG5236 + Micron B27B)
- ADATA XPG Gammix S70 vs Acer Predator GM7000 (IG5236 + Micron B47R)
- ADATA XPG Gammix S70 vs ADATA XPG Gammix S70 Blade (PCIe 4.0 NVMe/7,400 MB/s Read/6,400 MB/s Write/Established Midrange Gaming Drive)