- #Do i need an extra adapter for 2018 mac pro full#
- #Do i need an extra adapter for 2018 mac pro software#
I did not get them working with the 2M active cable in combination with anything else - but I got them working with two shorter passive cables. I had some success, but not as much, with bus-powered Thunderbolt 3 devices such as Dell Thunderbolt 3 SSD (Promise Technology board with M.2 Toshiba drive inside) and Promise SANLink3 N1 AQC107S 10G adapter. Although the 40Gbps cables have "3" on them, and the 20Gbps ones only have Thunderbolt logo, and plain USB-C cables have nothing (run at 20Gbps = 10Gbps x2 links), there are people who will not know that. I argued that apart from "why not" and that extra information is never a bad thing, people who are not as smart with technology will need to be notified when they are using lower performance cables - particularly at the start of a chain.
I made a case to him to add it a while back.
There is no way to find out in Linux, but I have been emailing Mika Westerberg of Intel and he says it is in his pipeline for Linux sysfs. ROOT\Intel\Thunderbolt\SdkTbtDevice\\LinkSpeed To check if the link is 20Gbps or 40Gbps, you need WMI Explorer in Windows. This is not a guaranteed indicator of success, but lack of tray icon appearing is almost certainly a guarantee of failure.
#Do i need an extra adapter for 2018 mac pro software#
When plugging in, a promising sign is the Thunderbolt Software tray icon appearing when you connect. You need to be patient - sometimes it takes 30 seconds or longer after plugging to finally recognise the device. Now you have to plug and unplug the devices until a connection happens. Once power delivery happens, you have the correct orientation. The procedure is to connect the host and device, and if no power delivery happens, flip one of the cables at the gender changer.
#Do i need an extra adapter for 2018 mac pro full#
By the way, using these same passive cables to my bus-powered Dell SSD (both 2016 controller JHL6340) with a R9 Nano installed with a M.2 riser, I hit the full performance (implies the cables are not at fault). It gets about 1.8GB/s when using passive cables (too high for the H2D bug) and 2.75GB/s when using active. This is measured with AMD APP SDK 3.0 "BufferBandwidth.exe". Strange thing is I hit full performance with two passive 40Gbps cables end to end, and it didn't even occur to me what had happened until ten minutes later when I realised and went "what the ACTUAL F*** just happened?". My friend's Sonnet 550 has the same old controller (annoying they are still selling them, must have massive stockpiles of old chips) and has the same problem, but hits full performance with an active cable. Then I get my 2M active cable and BAM it does it every time. I always thought the computer bus was bottlenecked. What is weird is that my eGPU (Gigabyte Aorus 1070 Box with AMD R9 Nano installed, sold GTX1070) has never hit the full 22Gb/s = 2750MB/s with passive cables.
But I left it running overnight with my eGPU at 40Gbps and it has not crashed or hung - so perfectly stable once initiated. The connection is unreliable to get started when using multiple cables end to end. The orientation at the host and device end does not matter (which implies the cables are not symmetrical inside - otherwise how could it tell?). The parity of the orientation in the middle matters - so if it does not work, then you need to flip one of the cables. My second longest cable I have is a 1M USB-C to USB-C 10Gbps (not even Thunderbolt) and I could not get it to work in combination with others (even though it works on its own as a 20Gbps Thunderbolt 3 cable). The longest I got is 2.5M which is 2M Active + 0.5M Passive 40Gbps. My hope is successfully chaining two or more cables together to make up for the optical Thunderbolt 3 cables which are *still* absent from the market. But it turns out, you can extend Thunderbolt cables without loss of performance (40Gbps reported link not 20Gbps). I was expecting to play with USB, PD and possibly DisplayPort alt-mode. I ordered a couple of USB 3.1 Type-C female to Type-C female adapters off Ebay.
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