Delidded chip difference between the cores

[the wopster]

I have an 8pack 5ghz chip, what should be the difference between the cores on a realbench stress test? At the minute I’m seeing an 8-9c difference between the hottest and coldest core is that about right?

 

[Drollic]

Anything between 6-10c is normal I believe. Last two cpus for me have also typically been 8-9c. Longer more intensive stress tests typically widen the gap a little I found.

 

[the wopster]

Anything between 6-10c is normal I believe. Last two cpus for me have also typically been 8-9c. Longer more intensive stress tests typically widen the gap a little I found.

Is that even on a delidded chip?

 

[Robzere31]

My 7700k (delidded by myself) tends to have a 5-8c variation in core temps.
I think it's fairly normal. I've certainly never worried about it.

 

[Drollic]

Is that even on a delidded chip?

No but I'd think very similar results. I'd only be worried about poorly applied TIM at 12c or more.

 

[ChocAndGray]

De-lidded or not it's completely normal to have variance in core temps.

Your variance between hottest and coolest is nothing out of ordinary.

 

[Freddie1980]

I wonder if the chips that are running hotter are being effected by the local cache and that difference is just extra residual heat coming from the on board memory?

 

[eddiew]

I wonder if the chips that are running hotter are being effected by the local cache and that difference is just extra residual heat coming from the on board memory?

Sounds sensible; this quickly-googled die diagram shows that each pair of cores has a different neighbour, so some of them will be affected by GPU activity, some by 'system agent' (?) and some only by the other cores.

 

[Raiden85]

I've been very happy with this 7700k with temp variance across the cores at idle and load. This is non delided with all cores synced at 4.5ghz cooled by a Noctua D14. So far up and running for 48hrs and a few hours gaming in Destiny 2.

Seems they did a very good pasting job on this one.