Phison says SSDs will hit 6.5GB/s speeds next year

The push by AMD into PCI Express 4.0 territory with its Ryzen 3000 series processors and X570 chipset is leading to faster SSDs, but to quote Randy Bachman's lyrics, you ain't seen nothing yet. Phison says we'll see SSDs hitting 6.5GB/s (or 6,500MB/s) in 2020.

If you haven't been following, AMD is the first to make use of the PCIe 4.0 bus spec, which doubles the bandwidth of PCIe 3.0 that is found on every modern motherboard currently shipping. It's already been usurped on a technical level by PCIe 5.0, which was only recently ratified, but it will be several years before we see any actual PCIe 5.0 products.

The same is not true of PCIe 4.0. Several companies have already announced PCIe 4.0 SSDs, all of which use a Phison PS5016-E16 controller. These new SSDs boast sequential read speeds of around 5GB/s. In contrast, the best NVMe SSDs typically top out read performance at 3.5GB/s.

Phison is already looking past its PS5016-E16 controller and is working on a new one that will support even faster speeds. Mixed Skills (via Overclock3D) posted a video to YouTube that shows Phison CEO K.S. Pua saying the new controller is "coming in Q1 next year," enabling reads of up to 6.5GB/s.

On the technical side, PCIe 4.0 supports around 2GB/s per lane, so in a x4 configuration, the bandwidth ceiling sits at roughly 8GB/s. That is the theoretical limit and doesn't account for overhead. Still, there is headroom to venture into the kind of territory that Phison is promising.

Incredibly fast read speeds won't have any noticeable impact on gaming, compared to existing SSDs. But for transferring lots of large files, faster drives can speed things up. Just as importantly, though, faster SSDs could help drive down pricing of today's models. We have already seen this to some extent, with NVMe SSDs becoming more affordable in the past few months.

That said, just because a controller supporting 6.5GB/s read speeds will soon exist doesn't mean that SSDs will immediately follow. It may take some time for SSD makers to employ the new controller. However, given that Phison is aiming for a first-quarter release, it's to expect that faster SSDs will follow sometime in 2020 to compete for the best SSD for gaming crown, alongside their best NVMe SSD brethren.

Paul Lilly

Paul has been playing PC games and raking his knuckles on computer hardware since the Commodore 64. He does not have any tattoos, but thinks it would be cool to get one that reads LOAD"*",8,1. In his off time, he rides motorcycles and wrestles alligators (only one of those is true).

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
A female Zoi making two hearts with her fingers.
Following 24 hours of Denuvo-based backlash, Inzoi is taking a surprising step and removing it entirely: 'We want to sincerely apologise for not aligning more closely with player expectations'
An image of a Helldiver from Helldivers 2 shooting at a red dragon from Dungeons & Dragons.
'Ok, so dragon builds are a thing now': galaxy-brained Helldivers 2 player incinerates a bile titan with a hover pack and a flamethrower
An ancient, angry stone mech from No Man's Sky's new Relics update
No Man’s Sky lets you unearth ancient, angry mechs in the astro-archaeology filled Relics update
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