cpu at 80% when streaming with obs?

[osohandsome1]

When i stream to twitch my cpu is around 80% is this normal? I have specs here
Operating System
Windows 10 Pro 64-bit
CPU
Intel Core i5 4670K @ 3.40GHz 26 °C
Haswell 22nm Technology
RAM
20.0GB Dual-Channel DDR3 (9-9-9-24)
Motherboard
Gigabyte Technology Co. Ltd. Z97MX-Gaming 5 (SOCKET 0) 28 °C
Graphics
XG270HU (2560x1440@144Hz)
Acer G245HQ (1920x1080@60Hz)
Acer G245HQ (1920x1080@60Hz)
Intel HD Graphics 4600 (Gigabyte)
3072MB ATI AMD Radeon R9 200 Series (ASUStek Computer Inc) 41 °C
3072MB ATI AMD Radeon R9 200 Series (ASUStek Computer Inc) 33 °C
CrossFire Disabled
Storage
1863GB Seagate ST2000DM001-1ER164 (SATA) 33 °C
465GB SAMSUNG HD501LJ (SATA) 33 °C
232GB Crucial CT250BX100SSD1 (SSD) 28 °C
Optical Drives
No optical disk drives detected
Audio
Realtek High Definition Audio

 

[Forever Oleg]

It takes a lot of CPU power to record and stream the material on your screen while keeping up the frames in the game.

Nothing unusual here.