Does DisplayPort 1.4 support 1440p 144Hz? Bandwidth and HDR guide
17.6 Gbps is the sweet spot mode for DisplayPort 1.4 monitors. 1440p 144 Hz HDR is where the interface delivers maximum quality with comfortable headroom. It's what most current-gen gaming monitors negotiate when plugged into a DP 1.4 source.
1440p (2560×1440) at 144 Hz with 10-bit 4:4:4 HDR needs 17.6 Gbps. That's 68% of DisplayPort 1.4's effective 25.9 Gbps data rate, leaving plenty of headroom for signal overhead, adaptive sync metadata, and audio return.
By TechCompare · Updated
Interface Bandwidth Analysis
See how much uncompressed and compressed bandwidth this resolution and refresh rate mode demands, compared to HDMI and DisplayPort connections.
Other connections
Assumes display traffic only and four DisplayPort lanes for USB-C. USB4 and Thunderbolt figures are for one DisplayPort stream.
Calculator
Display Bandwidth Calculator
Required Bandwidth
Uncompressed
17.60 Gbps
With DSC (Display Stream Compression)
4.69 Gbps
Interface Compatibility
HDMI
DisplayPort
Other connections
Assumes one display with no USB or PCIe data sharing. USB-C uses all four DisplayPort lanes. USB4 and Thunderbolt use the DisplayPort profile listed. The 120 Gbps modes add bandwidth for multiple streams, while one DP 2.1 UHBR 20 stream stays at 77.37 Gbps. Compare checks each display separately.
USB-C
Thunderbolt
USB4
How this is calculated
This is the canonical 27-inch 1440p gaming monitor mode. Any DisplayPort 1.4 cable with a certified DP-HBR3 chipset handles it without DSC, which means latency and color accuracy are both at their best-case values. Older DisplayPort 1.2 tops out at 17.28 Gbps and can't quite make this at 4:4:4. You'd have to drop to 8-bit (14.1 Gbps) or use 4:2:2 chroma.
Verdict
1440p at 144 Hz with 10-bit 4:4:4 HDR needs 17.6 Gbps, about 68% of DisplayPort 1.4's effective 25.9 Gbps rate, which leaves headroom for signal overhead, adaptive sync metadata, and audio return without DSC. That's what makes this the canonical 27-inch 1440p gaming monitor mode on DP 1.4: latency and color accuracy sit at best-case values because the link is uncompressed. Older DisplayPort 1.2 tops out at 17.28 Gbps and can't carry this mode at 4:4:4, which would force an 8-bit drop to 14.1 Gbps or a 4:2:2 chroma fallback. Push past 144 Hz to 175 or 180 Hz (common ultrawide overclocks) and you cross the DP 1.4 ceiling, which is where DSC or HDMI 2.1 take over.
More DisplayPort 1.4 scenarios
Related guides
Frequently asked questions
Is DisplayPort 1.4 good for 1440p 144Hz?
Is DisplayPort 1.4 enough for 1440p 240 Hz HDR?
Which is better for 1440p 144 Hz, HDMI 2.1 or DisplayPort 1.4?
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