So,what's my story about. My gaming performance just suddenly got bad. Before,I was on official 4.3 with everything stock and games ran flawlessly. Then I flashed AOSP ROM and everything still worked as it should (games didn't lag) and I was on AOSP for more than 4 months.
Now,I flashed back stock sammy-based ROM , and only after 4 days,I noticed that gaming performance is really bad.
Let's start from the fact that only god knows what I've done with my phone today to fix that, but I was unsucsessful. I changed ROMs,kernels,tweaked my phone,overclocked it,but nothing , games still lag like hell. Real Racing 3 has BIG fps drops,dead trigger 2 (low) has some lag spikes and some fps drops,too. Now I downloaded modern combat 4 and it was unplayable! I haven't flashed stock with odin,as my computer doesn't read my phone in download mode (again!),so I'm lazy to do it on other computer. But still thinking of that. Maybe at least very official ROM is the last hope.
So,can anyone help me? This is the first problem which I can't fix and that's bothering me,though I already got used to fact that now I may have to live without gaming,lol. Not a big problem,as for now. But really? What can be the cause? What's wrong with my phone? Why is UI smooth,why can't I see any lag when watching HD videos and etc, but games lag so badly? Look how good my score in antutu is (no overclocking,cpu and gpu - everything stock):