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AMD FirePro W4100, HDMI, Dell U2711, Help achieving full resolution with CRU
01-21-2019, 07:20 AM
Post: #1
AMD FirePro W4100, HDMI, Dell U2711, Help achieving full resolution with CRU
I have three Dell U2711 monitors connected to my computer, but one has some issues and doesn't run at full resolution for some reason (more information here: https://www.dell.com/community/Monitors/...#M119150). In particular there are issues with the DisplayPort input, so I am trying to use it with HDMI at full resolution, and I've just tried to use CRU to achieve that, but couldn't get the 2560x1440 resolution to show up in the display settings.

So could someone please guide me to use CRU correctly with the right settings to work with my computer? I did find this page: https://paste.jvnv.net/full/jk1zX with some settings to try, but still no luck. Let me know if you need more information.
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01-21-2019, 06:16 PM
Post: #2
RE: AMD FirePro W4100, HDMI, Dell U2711, Help achieving full resolution with CRU
Is there an HDMI data block in the extension block? If not, have you tried adding one? If that doesn't help, you might need this patch: https://www.monitortests.com/forum/Threa...ck-Patcher
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01-22-2019, 10:53 AM (This post was last modified: 01-22-2019 10:57 AM by benanna88.)
Post: #3
RE: AMD FirePro W4100, HDMI, Dell U2711, Help achieving full resolution with CRU
Thanks for your reply Toasty. I checked and I do have an HDMI data block in the extension block (screenshot: https://ibb.co/sbRYsqc ), and so I installed the patch and then redid the custom resolution and restarted the drivers, but it's still not giving me a higher resolution. Is there any other settings I might need to change? Or would it be helpful to post any other screenshots?
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01-22-2019, 09:46 PM
Post: #4
RE: AMD FirePro W4100, HDMI, Dell U2711, Help achieving full resolution with CRU
You need to edit the HDMI data block and change the maximum TMDS clock to 340 MHz.
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01-23-2019, 09:54 AM
Post: #5
RE: AMD FirePro W4100, HDMI, Dell U2711, Help achieving full resolution with CRU
That did it! Thanks very much.
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