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Mac mini M4 (2024): docks, stands and other accessories
- Thread starter MiniApple
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This looks really good, he’s getting nearly 7000mbs read and 5100mbs write WD 2TB SN850x write which is double that I’m getting with my ACASIS 40gbps enclosure with Lexar NM790 4TB SSD. Anyone know if I’d get similar speeds with my Lexar?.
I found this on Beelinks Reddit, there support stated the Mate Mini would only give just over 3000mbs read and write. I feel I’m missing something here because a dock which should do 80gbps they are stating no better than 40gbps?
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@NickRno77 “I feel I’m missing something here because a dock which should do 80gbps they are stating no better than 40gbps?”
Their advertising is economical with the truth. This dock is not Thunderbolt 5, but is USB4 Gen 2.
To use USB4 Gen 2 (80Gbps) you need a TB 5 Mac - M4 Pro or better.
With an M4 mini (TB 4) you will only get the same performance as USB4, nominally 40Gbps.
That is what their support is saying.
Their advertising is economical with the truth. This dock is not Thunderbolt 5, but is USB4 Gen 2.
To use USB4 Gen 2 (80Gbps) you need a TB 5 Mac - M4 Pro or better.
With an M4 mini (TB 4) you will only get the same performance as USB4, nominally 40Gbps.
That is what their support is saying.
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Thanks for explaining that Paul, I have a Mini M4 Pro so I’m guessing I’ll get roughly the same speed as the YouTube Review ?
There's no practical difference (but congrats to the USB-IF for confusing naming)
Intel licensed the TB3 40Gbps protocol to the USB-IF.
USB4 isn't a souped-up version of USB 3, it is TB3 with some extra USB-related goodies (such as proper hubs, and tunneling of the old USB2/3 protocols over added.
TB4 is just an Intel certification & branding scheme for USB4 devices that requires some optional USB4 features to be implemented as standard.
USB4v2 added PCIe4 and the 80Gbps mode (but made the latter optional)
TB5 is, likewise, just an Intel certification & branding scheme for USB4v2 with some of the optional features (like the 80Gbos mode) made compulsory.
First, that test was for a Samsung 980, which is a PCIe 3.0 SSD and caps out at 3500 MB/s anyway.
Second, there are two models of the dock - one with two M.2 slots with 2 lanes each and another with a single 4-lane slot. They don't say which model that test was from, but the 2-slot version is only going to give half the bandwidth of each drive.
Yes with a fast PCIe4x4 SSD stick (like the WD Black SN850X on the video) & the single-slot version of the dock.
...but not if your SSD stick is only 3500MBps (28 Gbps) like the one on Reddit! And not if you're using the dual x2 slot version of the dock
The Reddit test was using a Samsung 980 Pro, possibly they testing with the A version, I’m looking at the 80gbps B version. I have a Lexar NM790 4TB SSD, I’m guessing that won’t cap out at 3500 mbs .