Sidebar Sidebar
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

MP All Models AMD Radeon RX 6800 XT / 6900 XT for macOS?

The 6800 came. I can not get an output from the USB-C cable port. Works fine on DP with either a bidirectional cable or the Belkin Charge cable. Did I buy the wrong cable from Amazon:

www.amazon.com

JSAUX USB C to USB C Cable, 3-Pack [6.6ft+3.3ft+1ft ] Type C Fast Charging Cord Compatible with Samsung Galaxy S22 S21 S21+ S21 Ultra S20 Plus S20+ Note 20 10, Google Pixel 6 5 4 3 2 XL-Grey

JSAUX USB C to USB C Cable, 3-Pack [6.6ft+3.3ft+1ft ] Type C Fast Charging Cord Compatible with Samsung Galaxy S22 S21 S21+ S21 Ultra S20 Plus S20+ Note 20 10, Google Pixel 6 5 4 3 2 XL-Grey
www.amazon.com

No output with either the TB3 cable or the USB-C cable

Edit - Just bought this cable - Description says "video". Didn't realize there were different USB-C cables❓

www.amazon.com

NIMASO USB C to USB C 3.1 Gen 2 Cable 10Gbps Data Transfer, 4K Video Output Monitor Cable 100W PD Fast Charging, for iPhone 15Pro/15ProMax/15/15Plus, MacBook, Huawei Matebook, iPad Pro 2020,Chromebook

This is a usb c 3.1 gen 2 cable, suit for video display and connecting your monitor, compatible with thunderbolt 3 port and usb c 3.1 gen2 port.
www.amazon.com

Lou
 
Last edited:
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.
flowrider said:
Did I buy the wrong cable from Amazon:

https://www.amazon.com/dp/B07PDLV7KL?psc=1&ref=ppx_yo2_dt_b_product_details
Click to expand...
USB-C is a s**tshow. Why they thought it was a good idea to allow such crap cables in the spec is anyone's guess, and makes buying cables a challenge.

That cable is only USB 2.0, and won't support any of the alternate modes of USB-C including DisplayPort. From the Amazon description:

It is a charging and data cable not Thunderbolt 3 cable so it can not output video.
Click to expand...
 
Anyone able to create an 8K timing (any refresh rate) on AMD 6000 series using SwitchResX that the macOS accepts? (I don't care if your display doesn't actually support 8K).
 
rondocap said:
Usb C cable from back of the LG 5k tb3 port to the 6900xt usb c. Tb3 cable did not work, but the monitor supplied usb c cable works in both os
Click to expand...
Did you try a 5K custom timings starting from 30Hz? Someone said they got 39Hz working. 5K60 would require two DisplayPorts and a Thunderbolt 3 or Thunderbolt 4 add-in card.
 
New cable arrived and all is now good. I sold my RX5700XT on eBay. I will be selling my Belkin Charge cable in the marketplace.

Lou
 
Any of you running Boot Camp? I was informed that with 11.4, you can now install Windows on an NVMe via PCI slot. I have one ready to go, but Boot Camp assistant doesn't show it as an option.
 
johnnymcc said:
Any of you running Boot Camp? I was informed that with 11.4, you can now install Windows on an NVMe via PCI slot. I have one ready to go, but Boot Camp assistant doesn't show it as an option.
Click to expand...
I have and did, Windows 10 on a 1TB mSATA in a PCI adaptor (also has a 1TB NVMe drive for search disks). Works great!

D84245A2-8861-4D10-B967-384CF8D2A5BA.jpeg

Side note, it’s kinda funny they are still using such old school looking hard drive icons for this stuff in Big Sur.
 

Attachments

  • C87ECD89-6F65-4A38-A0EC-446B6A3DA9E9.jpeg
    C87ECD89-6F65-4A38-A0EC-446B6A3DA9E9.jpeg
    346.6 KB · Views: 121
Last edited:
DFP1989 said:
I have and did, Windows 10 on a 1TB mSATA in a PCI adaptor (also has a 1TB NVMe drive for search disks). Works great!

View attachment 1781042
Side note, it’s kinda funny they are still using such old school looking hard drive icons for this stuff in Big Sur.
Click to expand...
Oh wait… so you have Windows on a regular SSD in a PCI adapter? (Not an NVMe) maybe that’s the problem? I am trying to put it on a NVME in a PCI slot
 
I don’t think so, I’m pretty sure I had the option of both the m.2 SSD and the NVMe SSD, but only once I’d upgraded to 11.4 beta.

Edit: Yep, I get all my internal drives (Apple SSD, m.2 SSD, NVMe SSD) showing as options in Boot Camp Assistant. Currently running the latest 11.5 beta. It wouldn't let me get this far if I had any USB or Thunderbolt storage devices connected.

Screen Shot 2021-05-25 at 10.49.30 pm.jpg
 
DFP1989 said:
I don’t think so, I’m pretty sure I had the option of both the m.2 SSD and the NVMe SSD, but only once I’d upgraded to 11.4 beta.

Edit: Yep, I get all my internal drives (Apple SSD, m.2 SSD, NVMe SSD) showing as options in Boot Camp Assistant. Currently running the latest 11.5 beta. It wouldn't let me get this far if I had any USB or Thunderbolt storage devices connected.

View attachment 1781253
Click to expand...
Ok - I wonder why my NVMe is not showing up as an option - I am stumped. I have no additional storage devices plugged in.
 
Never mind. Got Windows to install successfully on the NVMe. BUT - I cannot install the Adrenaline drivers for my Vega FE. It says it does not see the card, but it's actually installed. Currently have my LG 5K via USB-C and the ACD 30" via the Vega FE Display Port - there is no screen showing on the ACD display. Any suggestions?
 
flowrider said:
^^^^I read your earlier post and it was my impression that anything less than 330mm would fit. Thanks for the clarification.

But, as I posted I needed the USB-C because I'm using the Apple LG display with a TB only port.

Lou
Click to expand...
I thought 310mm was the limit. Will 330mm fit? I could not find this info from the Mac Pro 2019 manual hence I`m asking.
 
You must log in or register to reply here.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.
Top Bottom
Back