For me it's the Eldar matches, to the point I've started calling them Lagdar. Maybe it's the shooting disco lights thing or something, who knows. But whenever I play them, I am almost assured I'm going to have a shitty experience cause of technical shit. Sometimes I even skip Eldar games if I'm soloing around, not because I feel like they are overpowered or anything, but because there's literally no way for me to play against them with FPS issues.
Anything with more than 20 players will make my fps drop like crazy in this game. I've played more demanding games, with better fps, on higher settings: My rig: Quadcore i5-4590 GTX 970M 8gb Ram On 15 man maps i have 45-80 Fortress maps, specially defending B's, 25-35 fps Running BF4 with High/ultra settings...60fps. Something is fishy about EC, and it's not just with AMD's It's not as linear as Devs say. The game underperforms, it's really a fact.
I play fine on most maps. (sometimes issues on fortress) i7 4790k Zotac GTX 980 AMP! Omega SSD Hard Disk 16 gb ram Ping 75 to 150 Location Austia Vienna
Interestingly I decided to turn my graphics all the way upto Ultra last night (usually have to tweak the INI file and run with everything more or less off) just to see how the game looks maxed and lo and behold the game ran ruddy better than it normally does. I get the feeling that once it goes past a certain visual threshold, that the GPU actually starts to kick in properly rather than relying so much on the CPU. That to me just says that they need to get this fixed first over everything else as this is purely bad coding.