Performance decrease when switching to 2560x1080 from 1920x1080

[gamingwoop]

I have i5 4460, 4GB R9 290X and 8GB of RAM.
I currently play on 1920x1080 and all my games run perfectly, however I've always wanted a 21:9 monitor and am close to purchasing a 2560x1080 LG.

I'm not worried about performance for all games except Witcher 3 - because I've heavily modded it with multiple GPU-intensive shaders and textures, it currently runs at an average of 40fps, which is playable for me as I'm not an FPS-obssessive. However I've done the maths and 2560x1080 is 1.3 times the pixels of 1920x1080, so theoretically if it's directly proportional I should experience 1.3 times lower fps, which would be 30fps average...which may be too low to play.

Does it work this simply? Anyone have experience with FPS drops from 16:9 to 21:9 monitors?

 

[Astralv]

I do not do games, I do sound design, and use 2560x1080 and 4 monitors. I originally bought 29" LG monitor. It looked great for the audio software but was very short for other online activities. Like I had to scroll twice more to read a forum. So I went on and bought 34" LG. Now I have the same height and vertical real estate as my 1920x1080 monitor plus wide screen. It feels about the same as my 1920x1080 LG monitor in the sense of video quality, but I never liked that monitor. For the lack of better term, I can say- the pixels look thiner on 34" compared to 29", but 29" is too short. If I did not use KVM switch, I would buy 3440 x 1440 http://www.newegg.com/Product/Product.aspx?Item=24-025-066&utm_medium=BehEmail&cm_mmc=EMCPD-072016-_-PD-_-Bluecore-_-Content&utm_campaign=Price_Drop&obem=lTxafetFYxVtrPg78M2e5CcCj0Mr0kChVqO7mv2qbB8%3D&utm_source=Bluecore This is how much I paid for my 2560x1080.