Philips 275E1 2560x1440 with nVidia GT730 (EDID problem) not working

I would like to run QHD (2560x1440) resolution with the above setup (under Fedora 33, nvidia 390.141) via DVI output (connected via a DVI KVM-Switch and a DVI-HDMI adapter), but ran into problems because of conflicting EDID information. (I might add, that the same config works under Windows 10 with a GT610) During X startup, I see: [ 1246.824] (--) NVIDIA(GPU-0): Philips PHL 275E1 (DFP-0): connected [ 1246.824] (--) NVIDIA(GPU-0): Philips PHL 275E1 (DFP-0): Internal TMDS [ 1246.824] (--) NVIDIA(GPU-0): Philips PHL 275E1 (DFP-0) Name Aliases: [ 1246.824] (--) NVIDIA(GPU-0): DFP [ 1246.824] (--) NVIDIA(GPU-0): DFP-0 [ 1246.824] (--) NVIDIA(GPU-0): DPY-2 [ 1246.824] (--) NVIDIA(GPU-0): DVI-I-1 [ 1246.824] (--) NVIDIA(GPU-0): DPY-EDID-d8924ab7-3fc5-1d05-8925-b0246b2fb6b2 [ 1246.824] (--) NVIDIA(GPU-0): DVI-I-1 [ 1246.824] (--) NVIDIA(GPU-0): Philips PHL 275E1 (DFP-0): 230.0 MHz maximum pixel clock and [ 1246.824] (--) NVIDIA(GPU-0): --- EDID for Philips PHL 275E1 (DVI-I-1) --- [ 1246.824] (--) NVIDIA(GPU-0): EDID Version : 1.3 [ 1246.824] (--) NVIDIA(GPU-0): Manufacturer : PHL [ 1246.824] (--) NVIDIA(GPU-0): Monitor Name : Philips PHL 275E1 [ 1246.824] (--) NVIDIA(GPU-0): Product ID : 0xc20c [ 1246.824] (--) NVIDIA(GPU-0): 32-bit Serial Number : 0x0000a609 [ 1246.824] (--) NVIDIA(GPU-0): Serial Number String : [ 1246.824] (--) NVIDIA(GPU-0): Manufacture Date : 2020, week 51 [ 1246.824] (--) NVIDIA(GPU-0): DPMS Capabilities : Active Off [ 1246.824] (--) NVIDIA(GPU-0): Input Type : Digital [ 1246.824] (--) NVIDIA(GPU-0): Prefer first detailed timing : Yes [ 1246.824] (--) NVIDIA(GPU-0): Supports GTF : No [ 1246.824] (--) NVIDIA(GPU-0): Maximum Image Size : 600 mm x 340 mm [ 1246.824] (--) NVIDIA(GPU-0): Valid HSync Range : 30.0 kHz - 114.0 kHz [ 1246.824] (--) NVIDIA(GPU-0): Valid VRefresh Range : 48.0 Hz - 75.0 Hz [ 1246.824] (--) NVIDIA(GPU-0): EDID maximum pixel clock : 300.0 MHz As a consequence, X sorts out the detailed timings for 2560x1440 provided by EDID: [ 1246.826] (II) NVIDIA(GPU-0): --- Building ModePool for Philips PHL 275E1 (DFP-0) --- [ 1246.826] (WW) NVIDIA(GPU-0): Validating Mode "2560x1440_60": [ 1246.826] (WW) NVIDIA(GPU-0): Mode Source: EDID [ 1246.826] (WW) NVIDIA(GPU-0): 2560 x 1440 @ 60 Hz [ 1246.826] (WW) NVIDIA(GPU-0): Pixel Clock : 241.50 MHz [ 1246.826] (WW) NVIDIA(GPU-0): HRes, HSyncStart : 2560, 2608 [ 1246.826] (WW) NVIDIA(GPU-0): HSyncEnd, HTotal : 2640, 2720 [ 1246.826] (WW) NVIDIA(GPU-0): VRes, VSyncStart : 1440, 1443 [ 1246.826] (WW) NVIDIA(GPU-0): VSyncEnd, VTotal : 1448, 1481 [ 1246.826] (WW) NVIDIA(GPU-0): Sync Polarity : +H +V [ 1246.826] (WW) NVIDIA(GPU-0): Mode is rejected: PixelClock (241.5 MHz) too high for [ 1246.826] (WW) NVIDIA(GPU-0): Display Device (Max: 230.0 MHz). [ 1246.826] (WW) NVIDIA(GPU-0): Mode "2560x1440_60" is invalid. Any idea what I can do about this?