Core i5 8400 at 3.7Ghz

[01002920]

I just bought a core I5 and when using the CPU Z on the Stress CPU option, the cpu only runs at max 3.7Ghz. I read the 8400 max speed was 4 Ghz. Is my processor defective?

 

[superninja12]

short: no

bit longer than short: it can hit 4 ghz on 1 core.
if all cores run simultaneously, it runs way slower , because of the power that needs to be deliverd.
tip: questions like these get asked alot and have got already a thread http://www.tomshardware.co.uk/answers/id-3546742/turbo-boost-coffe-lake-core-8400-work.html

 

[rhysiam]

I just bought a core I5 and when using the CPU Z on the Stress CPU option, the cpu only runs at max 3.7Ghz. I read the 8400 max speed was 4 Ghz. Is my processor defective?

4Ghz is the single core turbo frequency. If you run a single threaded workload (a load that only taxes a single CPU core), it should run at 4Ghz. Most "stress" tests will fire up all 6 cores in the CPU, which causes might higher load and reduces the turbo frequency. 3.7Ghz sounds absolutely fine for a 6 core stress test.

There's nothing wrong. The CPU is behaving as it should.