Is this normal 7800X3D/ 7000 series temp behavior?

[Mozametweakin]

Not sure if this is just normal AMD stuff, but opening relatively smaller applications still spikes the temperature a lot. I just did some PBO tuning which got me 2-3% higher score in cinebench with 10-12C decrease, where I maxed out the power limit to 70W from about 80W. Before I did any tuning, I tested this same thing as the video, and the tuninng didn't do much. Instead it would spike up to about 72 or 73C.

 

The idle temps have always been on the higher end, but I've heard that that's just AMD being AMD. 

 

FYI - I have an NZXT H5 FLOW and an NHD-15

 

This isn't a huge deal to me, as I only use the pc for watching content and playing a lot of games, and the temps are just fine while gaming; just wondering if this is normal.

2024-06-12 16-40-44.mkv

[Hinjima]

6 minutes ago, Mozametweakin said:

Not sure if this is just normal AMD stuff, but opening relatively smaller applications still spikes the temperature a lot. I just did some PBO tuning which got me 2-3% higher score in cinebench with 10-12C decrease, where I maxed out the power limit to 70W from about 80W. Before I did any tuning, I tested this same thing as the video, and the tuninng didn't do much. Instead it would spike up to about 72 or 73C.

 

The idle temps have always been on the higher end, but I've heard that that's just AMD being AMD. 

 

FYI - I have an NZXT H5 FLOW and an NHD-15

 

This isn't a huge deal to me, as I only use the pc for watching content and playing a lot of games, and the temps are just fine while gaming; just wondering if this is normal.

2024-06-12 16-40-44.mkv 5.89 MB · 1 download

This is completely normal for the Ryzen 7000 series. Nothing to worry about here.

My 7700X does the same and all other Ryzen 7000 Series CPU's do the same

The reason for the spike is that the CPU is designed to hit a thermal limit of 95C ( 85c for the X3Ds ) before limiting power or clockspeeds, so it doesn't care if its at 40 or 70c, it just bounces around like a happy puppy.

This is normal.

 

I can link you two videos explaining this further if you want to learn a bit more about this. Let me know.

[Agall]

10 minutes ago, Mozametweakin said:

Not sure if this is just normal AMD stuff, but opening relatively smaller applications still spikes the temperature a lot. I just did some PBO tuning which got me 2-3% higher score in cinebench with 10-12C decrease, where I maxed out the power limit to 70W from about 80W. Before I did any tuning, I tested this same thing as the video, and the tuninng didn't do much. Instead it would spike up to about 72 or 73C.

 

The idle temps have always been on the higher end, but I've heard that that's just AMD being AMD. 

 

FYI - I have an NZXT H5 FLOW and an NHD-15

 

This isn't a huge deal to me, as I only use the pc for watching content and playing a lot of games, and the temps are just fine while gaming; just wondering if this is normal.

2024-06-12 16-40-44.mkv 5.89 MB · 2 downloads

What cinebench R23 scores you getting?

[GuiltySpark_]

1 hour ago, Hinjima said:

The reason for the spike is that the CPU is designed to hit a thermal limit of 95C ( 85c for the X3Ds ) before limiting power or clockspeeds, so it doesn't care if its at 40 or 70c, it just bounces around like a happy puppy.

I wish more people would concern themselves with benchmark performance and clockspeed and stop looking at temperature unless its actually in the red. 

[Hinjima]

9 minutes ago, GuiltySpark_ said:

I wish more people would concern themselves with benchmark performance and clockspeed and stop looking at temperature unless its actually in the red. 

Absolutely. The thing with the Ryzen 7000 series is that during heavy synthetic loads or similar they would hit 95c and stay there and in programs like HWinfo64 it should come up as red numbers ( 95c ) and people would be worried while this being completely normal for the Ryzen 7000 series.

 

This is me running Cinebench R23 on my 7700x.

People would get worried by the red numbers while I am not as I know how these things work.

 

I just wish people did more research on things they buy.

Especially something as expensive as PC components.

[Mozametweakin]

3 hours ago, Agall said:

What cinebench R23 scores you getting?

Post pbo tune was about 18200

[GuiltySpark_]

3 minutes ago, Mozametweakin said:

Post pbo tune was about 18200

Exactly where you should be.

[Mozametweakin]

3 hours ago, Hinjima said:

This is completely normal for the Ryzen 7000 series. Nothing to worry about here.

My 7700X does the same and all other Ryzen 7000 Series CPU's do the same

The reason for the spike is that the CPU is designed to hit a thermal limit of 95C ( 85c for the X3Ds ) before limiting power or clockspeeds, so it doesn't care if its at 40 or 70c, it just bounces around like a happy puppy.

This is normal.

 

I can link you two videos explaining this further if you want to learn a bit more about this. Let me know.

This might be an in depth answer, but how are they just able to hit a temp like that with such low power draw? For example, before pbo tune today it would hit that 85c target at only 80w (not even maxed out frequency). Then I can also do something like pbo tune where I set an offset in the negative for the voltage/frequency curve, run 10w less, run 10c less and still gain 100-200 mhz. 

[GuiltySpark_]

6 minutes ago, Mozametweakin said:

how are they just able to hit a temp like that with such low power draw

By packing a lot of cores in a very small space, slapping 3D V-cache on top of it then smothering the whole thing in a thick as hell IHS. 

 

My last recorded run. Once I knew everything was working as expected I just leave it alone. This chip is simple to cool, and by that I mean allow it to work to its fullest potential, not cool as in keep the temps under some preconceived number. Temps don't matter, performance and clockspeed does.

 

[Agall]

9 hours ago, Mozametweakin said:

This might be an in depth answer, but how are they just able to hit a temp like that with such low power draw? 

The 3D v-cache mod adds about a 20C insulator on top of the die. That's applicable whether its drawing 10W or 90W, especially if you vary fan temps when at lower wattage. Its not a concern though, as long as your cinebench R23 scores are within margin, you're giving it enough cooling.

 

 

They file down the die to add the L3 cache and then silicon spacers on top of the cores. What this photo doesn't show is that the end caps are where the cores are, the normal L3 is in the center. Any time you add a thermal layer to a heat source, it'll increase  heat source temperature, even if its removing silicon to add more silicon since that's bonded in some way that isn't molecularly the same.

 

Easiest way to see this is with the 7950x3D. The CCD0 vs CCD1 temperatures. This translates the practically the same effect when direct-die cooled.

 

 

The later part of this thread shows per core temps with direct die. Even direct die with just CCD0, a 7950x3D only gets to about 19k. There's a sort of hard thermal limit at 4.8GHz with 7000x3D when you're sending enough watts through it.