Intel Haswell Linux Performance For Valve's Source Engine Games
The Team Fortress 2 performance is lower than Counter-Strike: Source and at 1280 x 1024 the Haswell graphics core was putting out just 40 FPS. The Haswell Linux performance was still in line with the Radeon HD 4650 on R600g.
Team Fortress 2 with the 1080p resolution had a 31 FPS average. At least with Intel's Broadwell hardware next year the performance will be another step higher.
20 FPS was the average for the Core i7 4770K CPU at 2560 x 1600.