You won't be able to buy a high capacity 5-bit PLC SSD until 2025 says WD

Intel SSD 670p
(Image credit: Intel)

Penta level cell (PLC) flash may be the next logical step for SSDs, but Western Digital for one doesn't think the technology is going to be ready for prime time until at least 2025 (via Tom's Hardware). The reason for the delay is because newer, more powerful controllers are going to be needed to make the shift to PLC worthwhile.

Peak Storage

SATA, NVMe M.2, and PCIe SSDs on blue background

(Image credit: Future)

Best SSD for gaming: the best solid state drives around
Best PCIe 4.0 SSD for gaming: the next gen has landed
The best NVMe SSD: this slivers of SSD goodness
Best external hard drives: expand your horizons
Best external SSDs: plug in upgrades for gaming laptops and consoles

The most popular storage technology currently used by SSDs is triple-level cell (TLC) flash, which uses eight voltage levels to store three bits per cell. Quad-level cell (QLC) flash uses 16 voltage levels to store four bits per cell, but requires advanced error correction along with wear-levelling and overprovisioning to maximize endurance. 

The 32 voltage levels needed for PLC flash will require even better error correction, which in turn requires faster processors at the heart of the controllers. This new flash technology will also require more overprovisioning, error correction, and wear-levelling to make the 25% increase in capacity worthwhile. 

The problem isn't the flash technology itself, but rather what else goes into a modern SSD, and those can undermine the value proposition of PLC itself. Much in the same way that QLC flash memory hasn't resulted in cheaper, more capacious SSDs, despite the promise—these drives need elaborate caches to mask the underlying performance of the flash technology used. 

We may see PLC SSDs before 2025 of course, as the computing industry has a history of sorting out these kinds of issues. And this could result in SSDs offering hard drive levels of capacity, hopefully without offering hard drive levels of performance. It doesn't look like it's just going to be an easy step of switching to PLC flash though. 

Alan Dexter

Alan has been writing about PC tech since before 3D graphics cards existed, and still vividly recalls having to fight with MS-DOS just to get games to load. He fondly remembers the killer combo of a Matrox Millenium and 3dfx Voodoo, and seeing Lara Croft in 3D for the first time. He's very glad hardware has advanced as much as it has though, and is particularly happy when putting the latest M.2 NVMe SSDs, AMD processors, and laptops through their paces. He has a long-lasting Magic: The Gathering obsession but limits this to MTG Arena these days.

Read more
The WD Black SN850X 8 TB out of the packaging.
If you thought PCIe Gen 5 SSDs were a little pointless, don't worry, here comes 32 GB's worth of Gen 6 technology
The WD Black SN850X and the Lexar NM790 NVMe SSDs on a pink gradient background with the PC Gamer recommended logo in the top right
Best SSD for gaming in 2025: the speediest SSDs I personally recommend
An out-of-focus image of an SSD, surrounded by a colorful border, with a PC Gamer Best SSD 2024 logo in the center
PC Gamer Hardware Awards: The best gaming SSD of 2024
The WD Black SN850X 8 TB out of the packaging.
WD Black SN850X 8 TB NVMe SSD review
Western Digital NvMe SSDs.
Quit worrying about game install sizes with these future-proof SSDs
A collage of M.2 SSDs from Lexar and Western Digital against a gradient blue background, with a PC Gamer Recommended logo in the corner
Best M.2 SSDs for gaming in 2025: my top picks for blazing fast storage
Latest in SSDs
Crucial X9 external SSD on blue background
You can pick up the 2 TB version of my favorite budget external SSD for less than $0.06 per GB, transfers 300+ GB of data in 6 minutes
A Samsung 9100 Pro SSD in both 2 TB and 4 TB sizes.
Samsung 9100 Pro 2 TB SSD review
An image of a WD_Black SN850X SSD against a teal background with a white border
The best 1 TB gaming SSD you can buy is now just $79, the cheapest it's been for a good while
WD Black SN850X SSD on a gaming PC case.
Looks like we won't be seeing Western Digital SSDs in our gaming PCs as the company hands the reins back over to SanDisk
A SanDisk Desk Drive external SSD on a blue background
I adore this chunky, reliable external SSD, so for a third off the 4 TB version I will absolutely recommend it in a heartbeat
The WD Black SN850X 8 TB out of the packaging.
If you thought PCIe Gen 5 SSDs were a little pointless, don't worry, here comes 32 GB's worth of Gen 6 technology
Latest in News
Assassin's Creed Shadows promo image
Ubisoft scores a legendary ratio against Elon Musk on his own platform—which hopefully marks a final end to all the Assassin's Creed Shadows' culture war nonsense
Tzarina Katarin Bokha, the Ice Queen of Kislev
Total War: Warhammer 3 rolls out a cool Kislev overhaul, changes befitting Tzeench’s magic, new projectile units and creakier skeletal horses
An image of a golden first place award from Geoguessr
'We're actually getting GeoGuessr on Steam before GTA 6': the Google Street View puzzler arrives on Valve's platform this April
Napster client circa 1999
Former music-pirating platform Napster to be reborn rather ironically as a metaverse for musicians to connect with their fans after $207 million deal
The snazzy red and black HyperX Cloud Alpha wireless headphones float in a teal void. The microphone is attached to the headset.
The best wireless gaming headset is now even better in the Amazon Big Spring Sale, boasting a more than $50 discount
A chip being held up in an Intel fab
Intel is reportedly 'working to finalize commitments from Nvidia' as a foundry partner, suggesting gaming potential for the 18A node