RTX 4090 idling temps and memory clock

[Chris85]

Hi there,

today I noticed that my RTX4090 suprimX idles @ around 49 °C to 50 °C. With my monitor running @3440*1440, 144Hz I consider these temps as "ok".
In order to get a better data basis I used GPU-Z and compared the values there with the values in Geforce Overlay.

In general the values in CPU-Z and in Geforce Overlay show the same values - except for the values of the memory clock (Speichertakt in german).
In GPU-Z it shows 50.6 MHz (which is the idle clock of the RTX4090) and in Geforce Overlay it shows 405 MHz idle clock - both values are the lowest values displayed whenever I check them.

So how comes that there are different values for the Memory Clock? Or maybe is the "Speichertakt" not the Memory Clock even this would be the right translation?

Cheers

Chris

 

[Chomiq]

Hi there,

today I noticed that my RTX4090 suprimX idles @ around 49 °C to 50 °C. With my monitor running @3440*1440, 144Hz I consider these temps as "ok".
In order to get a better data basis I used GPU-Z and compared the values there with the values in Geforce Overlay.

In general the values in CPU-Z and in Geforce Overlay show the same values - except for the values of the memory clock (Speichertakt in german).
In GPU-Z it shows 50.6 MHz (which is the idle clock of the RTX4090) and in Geforce Overlay it shows 405 MHz idle clock - both values are the lowest values displayed whenever I check them.

So how comes that there are different values for the Memory Clock? Or maybe is the "Speichertakt" not the Memory Clock even this would be the right translation?


View attachment 285656


Cheers

Chris

They might be updating at different intervals. With full passive cooling 50C might be normal, what's your case/fan situation?

Per TPU review:

 

[Chris85]

They might be updating at different intervals. With full passive cooling 50C might be normal, what's your case/fan situation?

Per TPU review:
View attachment 285675

Thank you,

updating at differnet intervals was what I also was thinking first but like I wrote the memory clock in Geforce Overlay never goes below 405Mhz

 

[DarkDreams]

The memory clock difference is a multiplier thing. Similar to regular ram being double data rate, vram also has a base clock it runs at (as shown by software like GPU-Z or HwInfo64) and an effective clock (as shown by the Geforce overlay or afterburner). For my gtx 1660 super the multiplier is 4x, yours is 8x.

 

[Chris85]

The memory clock difference is a multiplier thing. Similar to regular ram being double data rate, vram also has a base clock it runs at (as shown by software like GPU-Z or HwInfo64) and an effective clock (as shown by the Geforce overlay or afterburner). For my gtx 1660 super the multiplier is 4x, yours is 8x.

Thank you for that explanation. Everyday I learn something new