The SanDisk Optimus range includes drives aimed at different workloads, but the two models with the clearest official specifications are the creator-oriented Optimus 5100 and gaming-oriented Optimus GX 7100. Both are M.2 2280 PCIe 4.0 NVMe SSDs; their capacities, NAND types and advertised performance differ. Check your device’s slot and NVMe support before choosing either one.
What the SanDisk Optimus names mean
SanDisk’s documented consumer models include the Optimus 5100 and Optimus GX 7100. SanDisk positions the 5100 for creator and everyday use, and the GX 7100 for gaming. A January 2026 report from Tom’s Hardware describes a broader naming scheme—Optimus, Optimus GX and Optimus GX Pro—and maps the 5100, 7100 and 8100 names to earlier WD Blue SN5100, WD Black SN7100 and WD Black SN8100 models, respectively. That is reported predecessor context, not proof that specifications or hardware revisions are identical. The official GX Pro 8100 specifications are not established here, so the two documented drives below are not a complete catalog.
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Tom’s Hardware’s January 5, 2026 report on the naming
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Which SanDisk Optimus SSD should you buy?
First check that your computer or other device accepts an M.2 2280 NVMe drive and supports PCIe. The shared form factor and interface labels do not guarantee fit or compatibility in every laptop, handheld, console or motherboard. Then choose capacity and workload fit; do not assume a larger drive has the highest advertised speed.
#1 Best Overall
- SPEED UP PROJECTS. Launch creator applications fast with uncompromising PCIe 4.0 read speeds up to 7,100MB/s,[2] (1TB and 2TB[1] models) and write speeds up to 6,700MB/s[2] (1TB[1]-4TB[1] models).
- CREATE AND STORE MORE. Make more room for your 4K videos and high-resolution images with capacities from 500GB[1] up to 4TB[1] on M.2 2280 built with our trusted 8th generation SANDISK BiCS QLC 3D CBA NAND.
- IT GOES WHERE YOU GO. With an all-new power efficient design, your drive delivers high performance with low power, giving you more time to be productive while on the go.
- UNCOMPROMISED RELIABILITY. With up to 1,200 TBW[3] (4TB[1] model) endurance rating, your drive is designed for creators.
- KEEP YOUR DRIVE UPDATED. Monitor your SSD’s performance and check for updates with the downloadable SANDISK Dashboard application.[5]
- Choose the Optimus 5100 if its available capacities and creator/everyday positioning suit your use. SanDisk specifies QLC 3D CBA NAND, Host Memory Buffer and nCache 4.0.
- Consider the Optimus GX 7100 for its gaming positioning and TLC NAND. SanDisk specifies 8th-generation BiCS TLC 3D CBA NAND.
- Compare the capacity-specific figures below rather than treating a product family’s peak number as universal.
The NAND distinction is documented, but the available specifications do not establish a complete real-world comparison of endurance or sustained workloads between the lines. Performance figures are manufacturer maximums under stated test conditions, not independent test results or guaranteed typical speeds; SanDisk says performance can vary with host, usage conditions and capacity.
Optimus 5100 specifications by capacity
The 2025 SanDisk data sheet lists four capacities. Its sequential transfer figures are maximums under the sheet’s test conditions; endurance is stated in terabytes written (TBW).
Rank #2
- SPEED UP PROJECTS. Launch creator applications fast with uncompromising PCIe 4.0 read speeds up to 7,100MB/s,[2] (1TB and 2TB[1] models) and write speeds up to 6,700MB/s[2] (1TB[1]-4TB[1] models).
- CREATE AND STORE MORE. Make more room for your 4K videos and high-resolution images with capacities from 500GB[1] up to 4TB[1] on M.2 2280 built with our trusted 8th generation SANDISK BiCS QLC 3D CBA NAND.
- IT GOES WHERE YOU GO. With an all-new power efficient design, your drive delivers high performance with low power, giving you more time to be productive while on the go.
- UNCOMPROMISED RELIABILITY. With up to 1,200 TBW[3] (4TB[1] model) endurance rating, your drive is designed for creators.
- KEEP YOUR DRIVE UPDATED. Monitor your SSD’s performance and check for updates with the downloadable SANDISK Dashboard application.[5]
| Capacity | Max sequential read/write | Rated endurance |
|---|---|---|
| 500GB | 6,600/5,600MB/s | 300 TBW |
| 1TB | 7,100/6,700MB/s | 600 TBW |
| 2TB | 7,100/6,700MB/s | 900 TBW |
| 4TB | 6,900/6,700MB/s | 1,200 TBW |
All capacities are listed as M.2 2280 PCIe 4.0 NVMe drives with QLC 3D CBA NAND, Host Memory Buffer and nCache 4.0. The data sheet lists a five-year limited warranty and SanDisk Dashboard software for Windows only. See SanDisk’s Optimus 5100 product page.
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Optimus GX 7100 specifications
SanDisk describes the GX 7100 as a gaming drive with an M.2 2280 PCIe 4.0 x4 NVMe interface and 8th-generation BiCS TLC 3D CBA NAND. The data sheet supports capacities up to 4TB. Its quoted peak figures apply specifically to the 1TB and 2TB models:
Rank #3
- AN SSD THAT DOESN’T BACK DOWN. Experience PCIe Gen 4.0 Sequential Read/Write speeds up to 7,250/6,900 MB/s (2) (1TB (1) and 2TB (1) models). Reduce load times for applications and immersive games, including those supported by Microsoft DirectStorage.
- MOVING ON TO THE NEXT LEVEL. Improve system responsiveness with Random Read/Write speeds up to 1M/1.4M IOPS (2) (1TB (1) and 2TB (1) models) and integrated Sandisk nCache Technology.
- EXPAND YOUR GAME LIBRARY WITHOUT WORRY. Available in capacities up to 4TB (1) on M.2 2280, so you have ample storage for the latest games. Powered by our 8th generation Sandisk BiCS TLC 3D CBA NAND.
- CLEAR THAT CHECKPOINT. With a power‑efficient architecture, you can clear that checkpoint or wrap that project before your battery taps out.
- INCLUDED SANDISK SOFTWARE. Keep your drive updated and enable Game Mode with Sandisk Dashboard (Windows only) (4). Migrate to your new drive with Acronis True Image for Sandisk software (5).
- Up to 7,250MB/s sequential read and 6,900MB/s sequential write.
- Up to 1 million random read IOPS and 1.4 million random write IOPS.
These are manufacturer specifications, not evidence of an independently measured gaming advantage. The sheet also lists Dashboard Game Mode for Windows, Acronis True Image for SanDisk migration software and a five-year limited warranty. Check applicable regional and retailer warranty terms. Read SanDisk’s Optimus GX 7100 data sheet.
Compatibility and migration checks
Before buying
- Confirm the device has room for an M.2 2280 module.
- Confirm the slot supports NVMe over PCIe; M.2 describes the connector/form factor, not by itself the drive protocol.
- Check the device maker’s support information for capacity limits and installation requirements, especially in laptops, handhelds and consoles.
If you are moving an existing system
SanDisk lists Acronis True Image for SanDisk migration software for the GX 7100; its materials note that a separate cable or enclosure may be required. Dashboard software is documented as Windows-only. Confirm software compatibility and whether you need an enclosure before starting a migration.
Rank #4
- AN SSD THAT DOESN’T BACK DOWN. Experience PCIe Gen 4.0 Sequential Read/Write speeds up to 7,250/6,900 MB/s (2) (1TB (1) and 2TB (1) models). Reduce load times for applications and immersive games, including those supported by Microsoft DirectStorage.
- MOVING ON TO THE NEXT LEVEL. Improve system responsiveness with Random Read/Write speeds up to 1M/1.4M IOPS (2) (1TB (1) and 2TB (1) models) and integrated Sandisk nCache Technology.
- EXPAND YOUR GAME LIBRARY WITHOUT WORRY. Available in capacities up to 4TB (1) on M.2 2280, so you have ample storage for the latest games. Powered by our 8th generation Sandisk BiCS TLC 3D CBA NAND.
- CLEAR THAT CHECKPOINT. With a power‑efficient architecture, you can clear that checkpoint or wrap that project before your battery taps out.
- INCLUDED SANDISK SOFTWARE. Keep your drive updated and enable Game Mode with Sandisk Dashboard (Windows only) (4). Migrate to your new drive with Acronis True Image for Sandisk software (5).
How to interpret the advertised speeds
Sequential read/write numbers describe large, continuous transfers under manufacturer test conditions. They do not predict every application’s load time or sustained write behavior. Capacity matters: on the 5100, the 1TB and 2TB models have higher listed maximum read speeds than the 4TB; on the GX 7100, the quoted peak sequential and random figures are specified for 1TB and 2TB. Treat these as model-specific ceilings, not guarantees for another capacity or host system.
Quick Recap
Best Value
- AN SSD THAT DOESN’T BACK DOWN. Experience PCIe Gen 4.0 Sequential Read/Write speeds up to 7,250/6,900 MB/s (2) (1TB (1) and 2TB (1) models). Reduce load times for applications and immersive games, including those supported by Microsoft DirectStorage.
- MOVING ON TO THE NEXT LEVEL. Improve system responsiveness with Random Read/Write speeds up to 1M/1.4M IOPS (2) (1TB (1) and 2TB (1) models) and integrated Sandisk nCache Technology.
- EXPAND YOUR GAME LIBRARY WITHOUT WORRY. Available in capacities up to 4TB (1) on M.2 2280, so you have ample storage for the latest games. Powered by our 8th generation Sandisk BiCS TLC 3D CBA NAND.
- CLEAR THAT CHECKPOINT. With a power‑efficient architecture, you can clear that checkpoint or wrap that project before your battery taps out.
- INCLUDED SANDISK SOFTWARE. Keep your drive updated and enable Game Mode with Sandisk Dashboard (Windows only) (4). Migrate to your new drive with Acronis True Image for Sandisk software (5).
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