Custom Resolution Utility (CRU)

[NZXT30]

(02-10-2014 11:21 PM)ToastyX Wrote:  

(02-10-2014 09:13 AM)NZXT30 Wrote:  Hey Toasty, Thank you for this awesome utility. I've overclocked my 30" 2560x1600 monitor to 75hz and everything is working fine apart from a vsync related problem.

What monitor can do 2560x1600 @ 75 Hz without skipping frames?

(02-10-2014 09:13 AM)NZXT30 Wrote:  In some games like dota 2 and borderlands 2 vsync works perfectly locking my fps to 75. However, in other games like skyrim and path of exile vsync locks the fps at double the refresh rate which is 150 fps. this causes too much strain on my crossfire gpus amd 7950s and in future games I know I will not be able to maintain 150fps. If I use an fps limiter and cap fps to 75 then screen tearing occurs in those games.
Any idea of what's causing this problem?

I don't know. That seems like a driver bug. Make sure you are using two CrossFire bridges. CrossFire has weird issues at higher pixel clocks with only one bridge.

It's a Hazro HZ30Wie and I've managed to push it to 80hz with reduced timings and zero frame skipping. I've isolated the problem its a crossfire bug when I enable crossfire vsynch locks at double the refresh rate in most games without it everything is perfect.

However, that problem only happens when I use CRU defined refresh rate even at low pixel clocks if the refresh rate was made through CRU the problem occurs.

Edit: I added a second crossfire bridge and it solved the problem! 1600p at 80fps is insanely good...