i5 4670k changed to i7 4790K can not working?

[cbell7]

Yesterday, I changed my computer i5 4670k to i7 4790k, and then turn on computer, the computer fan and lights are start work, but down after 2 seconds, and then restart, then down. So I had to changed back to i5 4670. I want to know why this happened?

My computer configuration:

Z87 Motherboard

16GB Memory

ZOTAC Geforce GTX 760 OC

450w power

240GB solid drive

1T Hard Drive

[AP16]

You should upgrade motherboard BIOS first, cause 4790 was released by year later that 4670 and so BIOS needs to contain updated microcodes to support newer CPUs.

[cbell7]

Thanks for your advice. And I will follow your advice to solve my problem.

[Darwin_B_Intel]

Hello Christine1,

JFFulcrum's answer is correct.

The Intel® Core™ i7-4790K Processor belongs to the Devil's Canyon CPU platform released in 2014 as a refresh for the Haswell platform. The Intel® Core™ i5-4670K Processor is part of the first Haswell processors released in 2013.

Your motherboard is based on the Intel® Z87 Chipset family which was developed for Haswell processors in 2013 as well. The motherboard may support your Intel® Core™ i7-4790K Processor but that depends on the manufacturer. Most of the motherboard manufacturers enabled support for Devil's Canyon processors via BIOS update, eventually by updating the BIOS of your board you can get it to work.

If the BIOS update doesn't help you need to talk to your motherboard manufacturer to confirm if it will support the Intel® Core™ i7-4790K Processor.