I-5 8400 displays 4 cores?

[aocon62]

So today i went out to replace my i3-8100 with a i5-8400. I installed it (my first time doing so). I booted to my OS fine and proceeded to run some benchmarks. Not only does it feel a fair amount slower than my past cpu, it displays a very curious message. As far as i know, the only i-5 8400 to exist has 6 cores. My pc keeps displaying i-5 8400 but with 4 cores. Maybe i am being stupid, but there should be 6 cores displayed, Yes? It even says so on box. And it shows the amount as 4 cores on multiple software. Did i get a faulty cpu? Did i mess up the installation as it was my first time? Or am i just dumb?

 

[animemangamer]

So today i went out to replace my i3-8100 with a i5-8400. I installed it (my first time doing so). I booted to my OS fine and proceeded to run some benchmarks. Not only does it feel a fair amount slower than my past cpu, it displays a very curious message. As far as i know, the only i-5 8400 to exist has 6 cores. My pc keeps displaying i-5 8400 but with 4 cores. Maybe i am being stupid, but there should be 6 cores displayed, Yes? It even says so on box. And it shows the amount as 4 cores on multiple software. Did i get a faulty cpu? Did i mess up the installation as it was my first time? Or am i just dumb?

https://gyazo.com/32ed92e58dc5ac5769075d748c66353a

 

[dederedmi5plus]

Motherboard and OS?

 

[norcalsc]

you need to re install windows. you should be able to to system reset and be done