What would happen if 7th gen processor was physically put in 8th gen mobo?

[SilverJS]

Kinda sounds silly, but reason I ask is that I found a decent deal on a Z370-A that I'd like to buy. However, guy said the reason he's selling it is because it's not compatible with his 7700K. Buddy's obviously clueless, but in further conversations, he told me his neighbor is actually a computer technician, who gave him the diagnosis by telling him firmware needed to be upgraded. Sounds like he's talking 6th-gen mobo with 7th-gen processor...

Anyway. None of this matters too much, unless one of those two clowns actually PUT the 7700K into the board. Or - does it...? Seller will ask the neighbor (starting to sound fishy a little...?) if the processor was physically installed or not.

Hence, my question - would anything be damaged? Let's assume worst case scenario, where 7700K was physically installed, and motherboard was hooked up to ATX power and power-on was attempted. Would there be damage? My guess is : no, seeing as it's still the same physical socket, and seller did send me a picture of the actual board's socket, and pins looked good to me. Just want to make sure I'm not forgetting anything.

Thoughts?

Cheers!

 

[4745454b]

Not sure I've heard anything one way or another. There is no way it would work. I doubt any damage would occur to the board, but I'm honestly not sure. Have you looked online?

 

[SilverJS]

Yeah, I know it wouldn't - couldn't! - work, but just wondering what would happen to the board, if anything. I suspect it would just fail to post and that's that, but I'm not sure. I did try to look, but couldn't find anything, hence my question here.

 

[Gam3r01]

Heres the next question to ask.
Why is he selling it? Why wouldnt he return it?

 

[SilverJS]

Heres the next question to ask.
Why is he selling it? Why wouldnt he return it?

Valid. Hadn't thought of that. But, could he even? I mean - if the box was open and all, could you return a motherboard?.. And sometimes, with shipping and restocking fees, it makes more sense to try to sell... But still, point taken, I will ask.

EDIT : actually, maybe the reason is that he doesn't have the CD and manual anymore. Just remembered that. Not sure why. Wasnt too fussed about either, but there you go.

 

[Gam3r01]

Why someone would get rid of all packaging materials before making sure everything works out is beyond me, but if thats their reasoning so be it.

 

[jr9]

I've seen when a 8th gen Intel chip is installed into a 7th gen motherboard, it fits into the socket and the system starts up. You get a red CPU led when the system instantly fails POST and does nothing after that. Doesn't damage it, just does nothing. I imagine the same thing would happen if you try a 7th gen chip in a 8th gen board. Either way it just doesn't work and BIOS update's not going to help you.

Edit:

https://overclock3d.net/news/cpu_mainboard/kaby_lake_on_z370_and_coffee_lake_on_z270_-_it_fits_but_does_it_work/1

The Kaby Lake into Coffee Lake board causes a boot loop
The Coffee Lake into Kaby Lake board = POST failure

Still no harm to anything.

 

[SilverJS]

Thanks much, that's exactly the info I was looking for!