Navigating High Refresh Rates: A Guide to Fixing VG248QE DisplayPort Issues


Greetings, I’m seeking expert advice on a persistent issue with my VG248QE monitor, which has served me well for an extended period. Initially, it was connected to my PC via a DVI port, operating seamlessly at 144hz. However, after upgrading my graphics card to a 4070 ti Super, which lacks a DVI output, I encountered limitations with the HDMI port’s refresh rate, capped at 60hz. Subsequently, I attempted to use a DisplayPort 1.4 cable, but the screen remained black without any signal, even during boot, and I couldn’t switch inputs. Switching to a DisplayPort 1.2 cable resulted in severe visual glitches and frequent black screens, rendering it unusable even at reduced refresh rates. Multiple cables and troubleshooting steps have failed to resolve the issue. Without other devices to test the DisplayPort output or monitor, I’m contemplating purchasing a new monitor. Before proceeding, I’m eager to explore all potential solutions. Could you provide guidance on resolving these DisplayPort connectivity problems?”


This article aims to provide expert guidance on resolving DisplayPort connectivity issues experienced with the VG248QE monitor, particularly when interfacing with a newer graphics card that lacks a DVI output.


The VG248QE monitor is renowned for its high refresh rate capabilities, particularly when used with a DVI connection. Transitioning to a newer graphics card, such as the 4070 ti Super, introduces challenges due to the absence of a DVI port and the HDMI port’s limitation to a 60hz refresh rate.

Problem Statement:

The core issue arises when attempting to utilize a DisplayPort connection. A DisplayPort 1.4 cable results in a black screen with no signal, while a DisplayPort 1.2 cable causes severe visual glitches and instability, even at lower refresh rates.

Troubleshooting Steps:


Firmware and Driver Updates:

  • Ensure that the monitor’s firmware is up-to-date.
  • Update the graphics card drivers to the latest version available from the manufacturer.
  • 2.

Monitor Settings Adjustment:

  • Access the monitor’s on-screen display (OSD) and reset to factory settings.
  • Check for any specific DisplayPort configuration options within the OSD.
  • 3.

Graphics Card Settings:

  • Within the graphics card’s control panel, verify that the correct refresh rate is selected for the DisplayPort connection.
  • Explore any additional settings that may affect DisplayPort output, such as color depth or resolution.
  • 4.

Cable Quality and Specification Check:

  • Confirm that the DisplayPort cables are certified and meet the VESA standards.
  • Although rare, cable defects can occur; testing with multiple cables can rule out this possibility.
  • 5.

Alternate Connection Methods:

  • Consider using an active adapter that converts DisplayPort to DVI, which may retain the higher refresh rate capability.
  • 6.

Hardware Testing:

  • If possible, test the monitor with another device that has a DisplayPort output.
  • Similarly, test the graphics card’s DisplayPort output with a different monitor.


If the aforementioned troubleshooting steps do not yield positive results, it may be indicative of a compatibility issue between the monitor and the new graphics card. In such cases, acquiring a new monitor with native DisplayPort 1.4 support and a higher refresh rate could be a viable solution. However, it is recommended to exhaust all potential troubleshooting methods before proceeding with a purchase.


Before considering the acquisition of a new monitor, it is advisable to consult with the monitor and graphics card manufacturers for any known issues or further guidance. Additionally, seeking assistance from tech forums or communities may provide insights from individuals who have encountered similar challenges.

This article serves as a comprehensive guide to address the DisplayPort connectivity issues with the VG248QE monitor. By methodically following the troubleshooting steps, users can identify and potentially resolve the problem, ensuring the continued enjoyment of their high-refresh-rate gaming experience.

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