Monitor Tests Forum

Hello，

I just bought a new 23.8 inch LCD display (pnp ID: AMT2380), with native resolution 2560*1440p 60Hz and one VGA, one display port and one HDMI slot.

The strange thing is that on my windows 10 desktop PC with a Nvidia GeForce 405 card (512M memory, VGA and HDMI slot), it can only use 1980*1080p as the highest resolution with HDMI connection (VGA connection even lower).

I replaced the Nvidia card with an AMD ATI 7670 on the windows 10 desktop PC, it still worked on 1980*1080p.

I connected this LCD display to my macbook pro with HDMI line, it worked on native resolution perfectly.

I connected it to another windows laptop with HDMI line, it also worked on native resolution well.

I checked EDID of this LCD display, and got "Native/preferred timing.. 2560x1440p at 60Hz (16:9)".

I tried CRU 1.4.1，the application showed resolution 2560*1440p available, but it didn't work after restart display card.

Can anyone give me a clue on this? Thanks a lot.

p.s. I attached the exported EDID data file in this thread for reference.

Both of those cards are old and not even supported by the current drivers. It's possible they don't support an HDMI version new enough for 2560x1440 @ 60 Hz. Have you tried the pixel clock patcher? https://www.monitortests.com/forum/Threa...ck-Patcher

(03-22-2019 06:10 PM)ToastyX Wrote: [ -> ]Both of those cards are old and not even supported by the current drivers. It's possible they don't support an HDMI version new enough for 2560x1440 @ 60 Hz. Have you tried the pixel clock patcher? https://www.monitortests.com/forum/Threa...ck-Patcher

Hi, ToastyX

I tried the pixel clock patch according to your comment and problem solved!
Thank you so much!

Jimmy