@disk 装了一个 Linux 的虚拟机来测试，果然能跑到 800 多，不指望 1000M 了，问题解决

@disk 是吗，关键没有 linux 主机啊，我去弄个虚拟机

@giganet 但是问题是同一个无线，13pm 能跑到 800 多啊，换 MacBook 就只有 200 多了

@giganet 这个不对吧，你 866 的速率怎么只能跑到 247 ？起码也应该能跑到 8 折吧，你这个 50 的速率，内网完全没发传文件呢

@dingwen07 重启过了，晚上回家再试试调整信道了

@mofe 内网 iperf3 测试的

楼主解决了吗，我最近买了一个 5480 的路由器，也发现你这个情况，手机能轻松跑到 800M ，但是 macbook air 只能跑到 230M 啊

@movq 刚单位写错了，意思就是这个意思，感觉笔记本不正常

楼主把别的配件型号也发下呢，电源，内存，万兆网卡，机箱有推荐吗

@apo11o 你是什么系统的？

@apo11o But as general background info, the way USB-C works (prior to USB4, which this display doesn't support) is that it has 4 high speed lanes. Each lane can be allocated to video or USB 3.x data (or Thunderbolt, but that isn't relevant here). A full DisplayPort interface requires 4 lanes. Running USB 3.x data requires 2 lanes, which means that if you want to run video and USB 3.x together, your video bandwidth gets cut in half. USB 2.0 flows over pins dedicated to that purpose within the USB-C connector.

When you select High Data Speed, the connection is configured to support 2 lanes of DisplayPort and 2 lanes for USB 3.x. High Resolution causes the display to set up the connection for 4 lanes of DisplayPort and USB 2.0 (using those dedicated pins). The M1 Mac Mini supports DisplayPort 1.4/HBR3 over USB-C. Half of a DP 1.4 interface is enough for 4K 60 Hz, but apparently not 4K 60 Hz HDR. Limiting your USB speeds to 2.0 frees up more bandwidth, which is apparently needed for HDR. If you had a system that only supported DisplayPort 1.2/HBR2 over USB-C, this option is even more important because in that case you have to run High Resolution even to get 4K 60 Hz, otherwise you'd be limited to 4K 30 Hz if you wanted USB 3.x. This setting also comes into play on QHD/1440p displays where when you have a DP 1.2 system, you can choose to have QHD 60 Hz plus USB 3.x or dual QHD 60 Hz (via daisy chaining) with USB 2.0. But macOS doesn't support DisplayPort daisy chaining.


dell 论坛搜到的，好像 8 位和 10 位就差了 hdr 部分，感觉 hdr 平时真用不到，这个显示器的 hdr400 没啥用

@apo11o 奇怪了，m1 的 air 怎么只能跑到 2160P, 24-bit, USB 3.1

@Eagleyes 已经修改为高速率了，发现分辨率还是 4k 60hz 呢，你这个 10bit 哪里看的

@snsn 绿联那个拓展坞型号多少的，我去撸个来试试看

@chztv 硬盘格式为 apfs 的，格式应该不是问题

@sutra 绝对是 3.0 的，家里就没有 2.0 的线

@chendy 易驱线本身就自带一根 USB 3.0 的线，window 是直接用这个线了
mac 没 usb 口，只能用转接线了，试过接到 dell u2720q 上的 usb 口，效果一样，感觉不是转接线的问题吧

软件代码写死的，保修期内不会到的，你做梦呢

感谢分享