IdeaPad Gaming 3 15ARH7 SSD: Is the WD Blue SN580 Right?

The IdeaPad Gaming 3 15ARH7 does not use a hard drive. It uses M.2 NVMe SSDs, and the WD Blue SN580 (M.2 2280, PCIe 4.0 x4) is a compatible replacement as long as the failed drive was a full-length 2280 stick. Check the length of the old drive first, because this laptop has two M.2 slots of different lengths.

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What storage the 15ARH7 uses

Lenovo’s PSREF spec sheet for the IdeaPad Gaming 3 15ARH7 lists up to two drives. One slot is M.2 2242 and the other is M.2 2280. Both are listed as PCIe 4.0 x4, with a maximum of 1TB per drive. The 2280 SSD that Lenovo itself offers is listed as PCIe 3.0 x4, in 512GB or 1TB. There is no 2.5-inch SATA bay in the PSREF storage listing, so a 2.5-inch laptop hard drive or SATA SSD has nothing to plug into.

The confusion usually comes from older IdeaPad generations that did have a hard drive bay, and from retailer listings that say “SSD” without a size. This model line is all M.2.

Which drive size to buy

Some retailer listings for this model show a 2242 SSD as the factory drive, so configurations differ. Do not assume the length. Remove the bottom panel, find the drive, and read the “2280” or “2242” marking on the board or the slot standoff. If the failed drive was a 2242, you need a 2242 drive, and the SN580 is not the one.

If both slots are populated, confirm which drive actually failed. A drive that vanishes from the BIOS and Windows is a different case from a Windows installation that will not boot. Check the drive in the BIOS (press F2 at startup on most Lenovo models) before buying.

Why the SN580 suits this slot

The WD Blue SN580 is a PCIe 4.0 x4 drive. KitGuru describes a SanDisk four-channel controller with 112-layer BiCS5 TLC NAND, and WD rates the 1TB model at up to 4,150MB/s sequential read. It has no dedicated DRAM cache; Trusted Reviews confirms that and notes the nCache 4.0 SLC caching. PCGamesN found sustained speeds noticeably slower than premium drives but called it a good choice for people who do not write large amounts of data regularly.

For a gaming laptop that mostly reads game files, that trade-off is fine. Because the 15ARH7’s slot is PCIe 4.0, the drive can run at its rated interface speed, which is above what the 3.0 x4 drive Lenovo ships can do. The catch is the cache: after a very long continuous write, such as copying several hundred gigabytes, a DRAM-less drive slows down. That matters little for gaming and ordinary use.

Capacity: stay at or under 1TB

Lenovo’s listed maximum is 1TB per slot, so the 1TB SN580 is the capacity that matches the spec sheet. A 2TB drive may well work, but it is above what Lenovo documents, and there is no way to confirm it without trying it. If you want certainty, stay at 1TB.

Alternatives worth weighing

The Samsung 990 EVO Plus is the step up if you want a drive that holds speed under heavier writes and are willing to spend more. The Crucial P3 Plus is the cheaper rival, but it uses QLC NAND, which writes more slowly once its cache is full, so it is the weaker choice for a game library you refill often. A SATA 2.5-inch SSD such as the Crucial MX500 is the wrong form factor here and will not connect.

After the swap

Windows will need a fresh install on the new drive. Create Windows installation media on another computer, then boot from it with the new drive installed. Lenovo ships with Windows licensed to the machine, so reinstalling typically reactivates automatically. If the old drive is only partly failing, copy anything important off it before removing it. If a drive installs correctly but the BIOS still shows nothing, reseat it, and if it still does not appear in either slot, the fault may be the slot or motherboard, which needs Lenovo service rather than another drive.

Verdict

Buy the 1TB WD Blue SN580 if your failed drive was a 2280. Check the length before ordering, because a 2242 slot will not take it.