Normal behavior for 7800x3d??

[Berries]

Hey all i had a question regarding the 7800x3d during normal use. I just got a aio from ek for it and the temps idle are sitting around the mid 40’s which idk if that’s normal and then when watching YouTube for a split second I see a spike to the from low to mid 50’s and sometimes almost 60 is that normal or is it something I should be worried about 

[Eigenvektor]

Its maximum operating temperature (Tjmax) is 89°C. As long as it stays below that, nothing to worry about.

[Berries]

14 minutes ago, Eigenvektor said:

Its maximum operating temperature (Tjmax) is 89°C. As long as it stays below that, nothing to worry about.

I guess I would like an explanation as to what those little temp spikes are 

[Somerandomtechyboi]

9 minutes ago, Berries said:

I guess I would like an explanation as to what those little temp spikes are 

Boost algorithm

 

Basically the thing boosts high to get a task done as quickly as possible and once done clocks back down hence the spikes or something along the lines of that anyways

[Berries]

Just now, Somerandomtechyboi said:

Boost algorithm

 

Basically the thing boosts high to get a task done as quickly as possible and once done clocks back down hence the spikes or something along the lines of that anyways

Oh, I see is that why when I’m just sitting there doing nothing ICCPU utilization just go up and then shoot right back down

[Berries]

Just now, Berries said:

Oh, I see is that why when I’m just sitting there doing nothing ICCPU utilization just go up and then shoot right back down

 

1 minute ago, Somerandomtechyboi said:

Boost algorithm

 

Basically the thing boosts high to get a task done as quickly as possible and once done clocks back down hence the spikes or something along the lines of that anyways

And these tasks would be like background windows tasks, correct?

[Eigenvektor]

11 minutes ago, Berries said:

I guess I would like an explanation as to what those little temp spikes are 

A CPU is a tiny piece of metal, so it can heat up and cool down extremely quickly as its load changes. Perfectly normal behavior as long as it stays below its maximum rated temps.

 

Just now, Berries said:

Oh, I see is that why when I’m just sitting there doing nothing ICCPU utilization just go up and then shoot right back down

Most likely some background process that temporarily uses the CPU

[MiszS]

1 hour ago, Berries said:

I guess I would like an explanation as to what those little temp spikes are 

40 degrees idle is actually really good for this chip, some other users reported having 60 degrees on idle, though it all depends on what they mean by idle

[WereCat]

Also keep in mind that the temp you see is not whole CPU being at that temperature but the currently reported hotspot and the hotspot changes places on the die depending on which core is being utilised the most at the moment. 

[lafrente]

That's how Ryzens work. Their temps keep Ryzing all the time. It's annoying and I don't know how beneficial that constant up and down ~20c for every little task is for the chips longevity. Ways to reduce that are to undervolt and static OC and maybe some other boost and power options in BIOS.

[WereCat]

48 minutes ago, lafrente said:

That's how Ryzens work. Their temps keep Ryzing all the time. It's annoying and I don't know how beneficial that constant up and down ~20c for every little task is for the chips longevity. Ways to reduce that are to undervolt and static OC and maybe some other boost and power options in BIOS.

 People are just obsessed about temp without understanding how it works and are comparing it to Intel which is wrong because the sensors on AMD and Intel are different, measure differently and are located in different places on the die.

 

I'll just add my high level paint explanation.

 

The red is hot spot which may be up to 60 on "idle" depending what you consider "idle". Certainly in Windows the CPU is never actually idle and does some stuff in the background resulting in some boosting behavior. Rest of the cores may be asleep and close to ambient temp. The hot spot can change places depending on which CPU core is being utilized and it's not like the whole CPU is running at 60C on "idle".

That's why often a full multi-core load is never at higher temp or even at lower temp than a single core boost (assuming the workload is exactly the same just scaled across cores) since during single core boosts there is more power shoved in a single core and the area of hot spot is so small that it's physically impossible to transfer that heat into a cooler fast enough due to not sufficient surface area and contact limitations.

 

+ on 7800X3D you're limited even more during thermal transfer with the extra layer of L3 cache which works like an insulation layer resulting in worse temps even at lower power usages.

 

[Bagzie]

3 hours ago, Berries said:

Oh, I see is that why when I’m just sitting there doing nothing ICCPU utilization just go up and then shoot right back down

Have you got the pump plugged into a different header then the fans on the radiator?

 

Pumps should be run at a much higher Base speed than the fans.