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Inability to enable DRR while using DP can be reproduced by following these steps: Connect the monitor with a DisplayPort cable to the computer. Go to Settings , System , Display , and then Advanced display . Set the computer to use the highest resolution and refresh rate. Attempt to activate the Dynamic refresh rate switch to enable DRR. Affected Monitors: Dell UltraSharp 52 Thunderbolt Hub Monitor U5226KW Affected Platforms: Dell Pro Max Micro FCM2250 Dell Pro Max Slim FCS1250 Dell Pro Max Tower T2 FCT2250 Precision 3280 Compact Precision 3460 Small Form Factor Precision 3680 Tower Precision 5860 Tower Precision 5860 XL Tower Precision 7875 Tower Precision 7875 XL Tower Precision 7960 Rack Precision 7960 Tower
The NVIDIA RTX 4000 Ada Generation graphics card does not support DRR.
The Dell UltraSharp 52 Thunderbolt Hub Monitor U5226KW is working as designed. This is a limitation of the NVIDIA RTX 4000 Ada Generation graphics card. Connecting the Dell UltraSharp 52 Thunderbolt Hub Monitor U5226KW with the computer using the Thunderbolt port allows DRR to be enabled.
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