i5 8400 High usage

[CantThinkOfaUsername_]

Hey there. I've just built my recent pc (Gtx1060, I58400, z370 mobo, 8Gb 2933Mhz, evga supernova 650 p2, 1tb hdd)

For some reason, when playing games, my cpu usage is always really high, for example in Rise of Tomb Raider, even playing in lower res than 1080p, like 900p or even 768p (and with high or very high settings) the cpu is usually 90% - 100%. This happens in other intensive games like oc origins, witcher 3,...  I don't think it's a bottleneck, however, considering I've got all the drivers updated, XMP on, high perfomance mode for cpu and gpu.... 

All cores maintain a  steady 3800MHz. CPU temps are usually 70ºC. Graphic temps are a little weird barely reaching 60 ºC (Usage between 70/90 %). CPU usage in idle is normal, and using chrome is usually between 10 / 20 %

Do you have any idea what can be causing this?

Is this normal and am i overreacting or not?

Thanks for any help in advance,

Joaquim

[SaltyMelons]

Those games could just be heavily CPU oriented. Lowering resolution would just put less strain on your graphics card, but the CPU should stay about the same. You could also have a lot of background processes going on (you mentioned chrome) that would be eating up your processing power. Sometimes an antivirus program will do that. If you are getting around the expected frame rates in your games, then there shouldn't be anything to worry about.