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joevt

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Everything posted by joevt

  1. You are mixing units - and doing it backwards. 22 Gbps = 2.75 GB/s = 2750 MB/s = 2.561 GiB/s. Binary units (such as GiB) should not be used for data transfer numbers anyway. I think the OWC number of 2800 MB/s is just 2750 MB/s rounded up. They don't show benchmarks so it's hard to say where they got that number from. The 22 Gbps limit of PCIe traffic over Thunderbolt 3 might not be a hard limit. Newer CPUs and controllers may allow slightly better performance. I saw a benchmark of 2978 MB/s for a Thunderbolt 4 controller in a YouTube video. Right. The TB3 number of
  2. Did you mean 14:30 with the History Graph window? I don't recognize it either.
  3. Right. You might get PCIe tunnelling to work, but probably all the Thunderbolt drivers will not load, so you can't see things like the cable connection (link rate and width), firmware versions, ports, etc. and Thunderbolt packets that are not PCIe or DisplayPort will not be usable (Thunderbolt IP (Mac/Windows/Linux), Thunderbolt Target Display Mode (Mac only), and Thunderbolt Target Disk Mode (Mac Only)). I don't think there's anything special about Thunderbolt displays like the LG UltraFine 5K or Apple Pro Display XDR - they only use DisplayPort and PCIe if they're being connected with Thunde
  4. They could connect the Apple Pro Display XDR and get 6K if they had a Navi card because Navi supports Display Stream Compression (DSC). The W5700 has a USB-C port so they can also get the USB functions of the display (USB 2.0 ports, brightness control, presets, rotate?). Even if you have a Navi GPU that doesn't have a USB-C port, you might be able to get the USB functions using a Sunix UPD2018, Huawei VR 2 Computer Connection Cable, or Wacom Link Plus since only HBR2 link rate is required with DSC for 6K (I have all the above but don't have a Navi GPU or an XDR display to test). GP
  5. Linus neglected to mention XDR's support for Display Stream Compression (DSC). The XDR supports many connections. Thunderbolt (dual HBR3, no DSC) is only one of them. HBR2 (1440p60 12bpc, 4K60 10bpc, 5K 6bpc) HBR3 (this might not be allowed - I haven't seen evidence that single cable HBR3 works - there is a small amount of evidence that single cable is limited to HBR2) Dual HBR2 (5K60 10bpc) Thunderbolt only - Alpine Ridge, or Blackmagic eGPU before the firmware update. Dual HBR3 (6K60 10bpc - maybe 12bpc with EDID override using CRU?) Thunderbolt only. PC Thunderbolt 3
  6. The XDR can be driven by the RTX USB-C port. You won't need the GC-TITAN RIDGE + dual DisplayPort input because the RTX and XDR support Display Stream Compression. With DSC, you can get 6K 60Hz RGB 12bpc with a single HBR2 link rate connection. If you have a GPU that doesn't have a USB-C port (but still supports DSC), then you can use a USB-C to DisplayPort bidirectional cable to get 6K but you'll be missing the USB features of the display (USB ports, brightness control, presets, rotation). You might be able to get the USB features using a Wacom Link Plus, Sunix UPD2018, or Huawei VR 2 Compute
  7. I've received AGDCDiagnose info from someone with a Blackmagic eGPU (contains Radeon Pro 580 which does not support the DSC mode of the XDR display). It shows dual HBR3 connection from the Radeon Pro 580 to the Apple Pro Display XDR (this can be done only through Thunderbolt 3 since the Blackmagic eGPU has no other method to connect to the display). The EDID vendor/product is APPAE2E. This is the first I've seen having the ae2e product ID - it is also the largest because it has both the tile info/timings (tiled 5K and 6K) and the 4K, 5K, and 6K non tiled timings (7 EDID blocks total).
  8. The manual says you need Dual Link DVI for max resolution/refresh rate 1920x1080@144Hz. Since your RTX card has a USB-C port, you could use a USB-C to Dual Link DVI adapter (if you're not using the USB-C port for a USB-C display or hard drive or dock). I like Club 3D stuff because they have a user forum and have VESA certified cables for HBR3 speed. https://www.club-3d.com/en/detail/2471/usb_type_c_to_dvi_i_dual_link_active_adapter/ The adapter doesn't have a separate USB type A power connection because it can get USB power from the USB-C port. If you want to sa
  9. I believe so. I'm waiting for someone to post results of the following commands to prove it. /System/Library/Extensions/AppleGraphicsControl.kext/Contents/MacOS/AGDCDiagnose -a > AGDCDiagnose_a.txt 2>&1 /System/Library/Extensions/AppleGraphicsControl.kext/Contents/MacOS/DisplayDiagnose -a > DisplayDiagnose_a.txt 2>&1 The Apple Pro Display XDR Tech Specs do not mention any reduced visual capability for Macs or MPX modules that do not support DSC (if they at least have AMD graphics and Titan Ridge Thunderbolt controllers). Google: xdr site:support.apple.com
  10. It's a DIY thing. Put it in a box. Attach a power supply. And you got an adapter! Then attach DisplayPort cables and LG UltraFine 5K. It's kind of expensive though, like the HDMI 2.0 to DisplayPort adapters. I think the Wacom Link Plus is at least worth looking at (the HDMI input did not work well for me but DisplayPort works). It's limited to DisplayPort 1.2 (4 lanes HBR2) and USB 2.0 (the input is USB Micro B). There's a similar adapter from BizLink which supports DisplayPort 1.4 and USB 3.1 gen 2 and VirtualLink but I don't think it's a real product which is sad. Does anything u
  11. I forgot one item missing from the original post: For DisplayPort or USB-C to VGA adapters, there do exist adapters that can do up to 340 MHz. I have a Plugable usbc-vga adapter which can convert DisplayPort 1.2 (2 lanes of HBR2) to VGA (up to 330 MHz). I don't know why they only advertise 1920×1200@60Hz. For some reason, macOS limits the adapter to 160 MHz. Maybe Apple meant to limit some specific adapter but managed to limit all of them (I made a patch to remove that limit for macOS Intel graphics drivers). Many of the adapters are discussed at https://hardforum.com/thr
  12. The simplest method is to use the DVI input of your monitor: Use a passive HDMI to DVI cable or adapter. DVI uses the same signals as HDMI. If you want to use the DisplayPort input of your monitor then: There exist HDMI 1.4 to DisplayPort active adapters (1440p60, 4K30). Your monitor is only 1080p so HDMI 1.4 is good enough. This info is in the original post. There also exists really expensive HDMI 2.0 to DisplayPort active adapters (4K60). This info is missing from the "HDMI Source to DisplayPort Display" section if the original post (adapters from SIIG and gofanco
  13. Us mere mortals don't get access to the real Thunderbolt documentation. The USB4 spec is publicly available and may describe most of how Thunderbolt works. Section 10 is all about DisplayPort tunnelling. Section 10.4.2.1 is about Path Configuration: Setup. The next page (pg 362) describes how the Connection Manager calculates bandwidth available to limit the maximal link rate and lane count of the DP IN adapter's DP_REMOTE_CAP register. I guess Apple changed this calculation to allow two HBR3 four lane connections. I need an AGDCDiagnose output to prove that (but I believe there's no other way
  14. I don't think there's anything to fix with Titan Ridge. Somehow Apple makes it work to support 6K with GPU's that don't support DSC (read my post linked below). The capability required a firmware update for the Blackmagic eGPU's Thunderbolt controller (but I need an AGDCDiagnose output to verify that dual HBR3 is working from the BlackMagic eGPU and Macs - I only have info for dual HBR2 and HBR2 DSC modes). My test with two HBR3 displays with a GC-TITAN RIDGE shows one display can connect at HBR3 speed and the other can connect at HBR speed, which is the same bandwidth as dual HBR2
  15. Can you link the Snazzy Labs video that shows the display working at 6K on a Surface Laptop 3? DisplayLink is a USB to DisplayPort converter. It doesn't use the GPU. Really, DisplayLink has nothing to do with the XDR or the GPU. Does DisplayLink support 5K dual cable displays like the Dell UP2715K? Maybe. Does DisplayLink support HBR3 or Display Stream Compression (DSC)? I don't think so, therefore it can't support 6K. Read more about RTX, VirtualLink, USB-C, XDR at:
  16. The video should be updated with more info/testing with different PCs/Macs using different connection modes. The XDR has a Titan Ridge Thunderbolt 3 controller which can accept Thunderbolt or USB-C with DisplayPort alt mode input (Thunderbolt is also an alt mode of USB-C). The XDR supports the following input modes: 1440p HBR (good for booting) 4K 10bpc HBR2 5K 8bpc HBR3 (not sure about this one - needs testing with a DisplayPort 1.4 GPU that doesn't support DSC) 5K 10bpc HBR2x2 Thunderbolt 3 (from Alpine Ridge) 6K 12bpc HBR2 DSC 6K 12bpc? HBR3x
  17. Thunderbolt 2 supports dual DisplayPort 1.2, so shouldn't the max bandwidth be 20 Gbps instead of 17.28 Gbps, like you did for Titan Ridge with dual DisplayPort 1.4? You already have a DisplayPort 1.2 option so there isn't much reason to keep Thunderbolt 2 the same (unless the extra 2.72 Gbps cannot be used). With Titan Ridge, the extra 5.44 Gbps allows the Apple Pro Display XDR to run at 6K 60Hz 10bpc RGB using a dual link SST DisplayPort 1.4 HBR3 connections without DSC. Computers that support DSC (macOS/Windows: 5300M, 5500M, W5700X, maybe 5700XT?; Windows: RTX) use a single lin
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