Custom Resolution Utility (CRU)

[pZombie]

(01-25-2016 04:19 AM)ToastyX Wrote:  

(01-23-2016 10:34 AM)pZombie Wrote:  Then i tried what you suggested, 16/24/24... 24/24/24 ... 24/24/32 and they all DID work, as in giving me 144hz resolutions to choose from.
However, when clicking any of those 144hz resolutions (tried 1600x1200, 1920x1080 and of course 2560x1440) i was always getting "out of range" from my monitor.

Maybe the monitor will only accept certain front porch/sync width/back porch values. We know the monitor will accept 8/16/16, so try changing only one of the numbers to bring up the horizontal blanking/total: 8/16/40, 8/40/16, 32/16/16

If one of those work, try reducing the number by 8 to see if the driver will still accept it: 8/16/32, 8/32/16, 24/16/16

(01-23-2016 10:34 AM)pZombie Wrote:  (Just for the record. I tried 4/16/2 and 8/16/16 afterwards again, just to make sure. It removed all the 144hz resolutions which appeared again when going 16/24/24)

I am pretty much clueless as to what causes this. Especially why it would give me 144hz resolutions at values way beyond the standard values and when entering the default 4/16/2 it wouldn't give me any 144hz resolutions at all.

Like I mentioned, maybe AMD started limiting low horizontal blanking/totals because it was causing problems with some video cards. The "standard" values are not standard at all and are unusually low. I think NVIDIA made G-SYNC monitors work that way to keep the pixel clock under 540 MHz for SLI, but apparently AMD cards can't handle values that low.

That makes sense, even though it seems that it does not apply to all AMD cards as my two 7970 in CF cards have no flickering issues at 144hz with the old beta driver 14.11.2 i use in win10. It was a bit difficult to install as it required me, both to install it regularly, but also use the device manager to change the driver afterwards, for it to be accepted, for those who want to try.
Surprisingly it is also 100% stable when playing BF4 unlike the newer drivers.

You were also correct concerning the driver requiring a higher total for the AMD driver to accept the new resolution.
The total that is acceptable seems to be 56 and above. Anything below it just won't add the 144hz resolution.
Unfortunately, the monitor seems to require a lower total. I tried 8/16/32, 8/32/16, 24/16/16 with no success.

Is there any way to lower this by editing some file of the driver or copying a file from the 14.11.2 driver which works over?


edit: I went on to install the old driver and decided to do some additional experimenting with your utility.

With the old driver i tried 8/16/16 just to make sure, and it worked as expected. Then i tried to raise each of those values by 8 one by one and test, raising the total to 48 vs 40. None of which worked, giving me an "out of range".
Then i went on to test 24/8/8 8/24/8 and 8/8/24 all of which worked. So it's the total of 40 which this monitor accepts which makes it impossible to get it to work with newer AMD drivers which require a total of 56 to allow for a 144hz resolution.
Hope this helps someone facing the same issues.