Guys I recently bought the ASUS VG248QE + NVIDIA G-SYNC DIY Kit installed it on Friday with no problems. I am running 2 x GTX 780 Classifieds in SLI with no problems using 335.23 driver. I decided to go straight to BF4 and test online and I was getting allot of stuttering myself at first. I had G-Sync enabled NV control panel monitor set to 144Hz then I realized I had set my game to run maxed at 119.98 with this registry hack below from YouTube. I then changed it to 143.00 not making my refresh rate to go above the maximum refresh of 144Hz and so far no more stuttering at all in SLI.
So far I am very happy with G-SYNC it will be a game changer I believe specially if they get this dialed in a 4K resolution @ 60Hz with no lag or stuttering.
Before Friday I was using my other ASUS VG278HE Black 27" with Lightboost/Toasty's setup which was great but not as good as the G-SYNC I feel...
BF4 Registry mod to set max frames depending on your setup.
http://youtu.be/oU1q2wEcDiA
GSYNC and SLI not working for 2x 770s
Re: GSYNC and SLI not working for 2x 770s
If you have a really powerful PC gsync will cap you at whatever Hz your monitor is running at. I think when your FPS hits the limit it causes issues. I did that fps cap mod. 119.98Hz in BF4 and I set the cap in the BF4 registry to 116 to give myself some buffer area.