If you have trouble with multiple monitors not displaying via Displayport, or a single high resolution/high refresh rate display not displaying, you may be encountering a data rate bandwidth issue via Displayport. Displayport (hereafter DP) has 25.92 Gbps availble shared across all DP connections. See below for a list of common resolutions and data rates required for them. In general, you can typically run two 2560x1440 displays at 120Hz, three 1920x1080 displays at 144Hz, or a single 3840x2160 display at 120Hz without issue.
| resolution/refresh |
data rate Gbit/s |
| 1920x1080/60 |
3.20 |
| 1920x1080/120 |
6.59 |
| 1920x1080/144 |
8.00 |
| 1920x1080/240 |
14.00 |
|
|
| 2560x1080/60 |
4.98 |
| 2560x1080/120 |
9.95 |
| 2560x1080/144 |
11.94 |
|
|
| 2560x1440/60 |
5.63 |
| 2560x1440/120 |
11.59 |
| 2560x1440/144 |
14.08 |
| 2560x1440/165 |
16.30 |
| 2560x1440/240 |
24.62 |
|
|
| 3440x1440/60 |
8.92 |
| 3440x1440/75 |
11.15 |
| 3440x1440/120 |
17.83 |
| 3440x1440/144 |
21.40 |
|
|
| 3840x2160/60 |
12.54 |
| 3840x2160/120 |
25.82 |
| 3840x2160/144 |
31.35 |
| 3840x2160/240 |
54.84 |
|
|
| 5120x1440/60 |
13.27 |
| 5120x1440/120 |
26.54 |
| 5120x1440/240 |
53.08 |