New CPU, does not POST. Old one does, with exact same hardware. Videos inside

[Kazaji]

Hey.

Like the title says, my new CPU just came in. Problem is, it doesn't want to do... anything, really.

Relevant spec:
- Mobo: Z87X-UD3H
- PSU: 600W
- OLD CPU: i5-4570k
- NEW CPU: i7-4790k

Here's the video of my OLD CPU, which worked just fine an hour ago, and continues to work normally. No issues:
Video

Now here's the brand new CPU that I just received.
Video


As you can see, my old CPU (the i5) runs just fine. The videos are minutes apart, I just swapped out the CPUs and started recording again.
The new one (the i7) powers on for a split second, spins the CPU fan, and cuts power immediately.

Yes, I've inserted it correctly. I've tried each CPU twice, while sitting on a cardboard box. There is no visual damage to the new CPU, and the socket clearly works, since the old CPU never had any issues with it (and still doesn't). The socket is LGA1150 for both, so it should be compatible?

What is the issue here?

 

[danonymoosecat]

Hi. Have you tried updating the BIOS for the motherboard while your old CPU is still in it, and then tried swapping them out?

 

[Kazaji]

Hi. Have you tried updating the BIOS for the motherboard while your old CPU is still in it, and then tried swapping them out?

I have not, no. What would be the best way to go about that?

 

[danonymoosecat]

Go to the Gigabyte website here>> http://www.gigabyte.com/products/product-page.aspx?pid=4481#bios (double check that it is the correct board) and download the latest bios, which is F10b. It says next to the download that it has better support for Intel K series CPUs Once you have downloaded it, you should be able to install it via windows. If you can't then you can copy the file over to a USB device, reboot your machine and boot to BIOS, and there will be an option in there to update the BIOS. You may even be able to do over the internet directly through the BIOS if I'm not mistaken. Any struggles, let me know, I'm just about to do an update of my own

 

[danonymoosecat]

EDIT! The latest BIOS is a Beta... Double check your own BIOS version first (reboot into bios and check) and just update to the latest non-beta BIOS, if you aren't already on it.

 

[Kazaji]

EDIT! The latest BIOS is a Beta... Double check your own BIOS version first (reboot into bios and check) and just update to the latest non-beta BIOS, if you aren't already on it.

Eeeek, I'm on F5 (May 2013), which is about the last time I messed with my CPU/BIOS.

Going to start the update process now.

 

[danonymoosecat]

Wow. I'm pretty sure the update to F9 should resolve your issue then

 

[Kazaji]

Wow. I'm pretty sure the update to F9 should resolve your issue then

We have POST and I can load into BIOS with the i7.

Thank you so, so much. Updating the BIOS would have been the last thing to cross my mind.

Once I get a stable boot with the rest of the hardware installed, I'll mark this as solved.

 

[danonymoosecat]

You're welcome. It's happened to me a couple of times, and is now usually my first thought when a system won't post with a new CPU.