Glenwing :
derek.bredl :
In response to this ... I have this exact monitor and I am trying to use it as a second monitor to my laptop. I keep getting the "exceed bandwidth error" when trying to create the 144hz refresh rate (out of the box, 120hz seems to be the highest option) ... is this exceed maximum bandwidth possibly due to the HMDI cable I am using not being able to handle the bandwidth?
I do have a laptop that says it is 1.4 HMDI out ...
Interestingly enough, when I do try to create a custom resolution (taken from another post) I can get to 126hz @ 1920x1080 before it "exceeds bandwidth" ... wondering what that is due to? What component is causing it to exceed?
Make sure you set timing standard to CVT Reduced Blank when you set custom resolutions. Other options take more bandwidth and won't support as high of refresh rates.
See Section 6.3 here:
http://www.tomshardware.co.uk/forum/id-3675170/connect-120-display-construction.html
Unfortunately, tried that as well as the CRU utility ... even though I can create the custom resolution with the CRU utility, then "restart" my graphics drivers, the custom utility created through the CRU.exe does not appear in any of the programs (display, intel, or nvidia) so that I can choose it. It is still visible in the CRU program, just doesn't populate anywhere else that i have been able to find.
It's possible that the xg2402 is simply manufacturer locked to 120hz over HMDI (like many other monitors seem to be) ... unlike it's earlier brethren the xg2401. You excellent monitor post linked state it is unverified if it does indeed do 144hz over HDMI.
The only thing I can add/reiterate to the discussion is the continued "exceed bandwidth" error (I'm still not sure which "bandwidth" it's exceeding) and the fact that I CAN get to 1920x1080 at 126hz before bandwidth is exceeded.
According to
https://k.kramerav.com/support/bwcalculator.asp ... the bandwidth is 8.96 Gbps IF you are at 8 bit per pixel color depth factor (changing this does influence the bandwidth calculation on this website). At even just 10 bit per pixel color depth factor you are at 10.75 Gbps which exceeds the HDMI 1.4 bandwidth of 10.2 Gbps (that's correct?).
Though from the bandwidth calculator website I am not sure why the limit is 126hz at 1920x1080 because irrespective of the color depth factor nothing is really close to the 10.2Gbps limit of HDMI 1.4 such that it makes sense ... I may play around with seeing if I can change the color depth factor to see if that makes a difference?