When you use a thunderbolt 1 computer with a displayport monitor you do need to use a mini displayport cable not a thunderbolt 1 or 2 cable.
Thunderbolt cable 1 vs 2.
Thunderbolt 3 has a top data transfer speed of 40gbps as long as the cable is 0 5m 1 6 ft or shorter.
The term thurderbolt is basically hardware interface which allows connection of external peripherals with computer or laptop.
Thunderbolt 3 is a hardware interface developed by intel.
If you are using a mini displayport cable we recommend you narrow down the issue further.
This page compares thunderbolt 1 vs thunderbolt 2 vs thunderbolt 3 interface and mentions difference between thunderbolt 1 thunderbolt 2 and thunderbolt 3 interface types.
While the ports look the same the technologies have a number of key differences between thunderbolt 3 usb c 3 1 gen 2 and usb c 3 1 gen 1.
Displayport 1 2 is backwards compatible so the issue should not be due to different displayport revisions.
The problem is that the port and cable connectors for.
Compared to thunderbolt 2 it doubles the bandwidth to 40 gbit s 5 gb s allowing up to 4 lane pcie 3 0 and 8 lane displayport 1 2.
Thunderbolt 1 vs thunderbolt 2 vs thunderbolt 3 difference between thunderbolt 1 thunderbolt 2 thunderbolt 3.
It is hardware interface developed by intel apple which allows connection of any external peripherals to computer laptop.