The computer is cut down to max in Crysis 1. How to fix it? (Crysis)

After a minute of the game, the computer is cut down at maximum settings. This is only in Crysis, and only at max. settings.
In other games, it is played normally and at the same time they are much more demanding on the hardware than Crysis.
Percent: Intel Xeon X5460
Vidyuha: AMD R7 260X
RAM: 6GB