Question CPU-Z showing half Uncore Frequency

Dec 8, 2021
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Hi Everyone

So strange thing I see and cant find someone with something similar.
I have the following RAM:
VENGEANCE® LPX 32GB (4 x 8GB) DDR4 DRAM 3600MHz C18 Memory Kit - Black

I have XMP enabled on my Aorus B450 Pro.
In Windows 11 it shows 3600Mhz:



On CPU-z however it shows the following:


Under "Uncore Frequency" its showing half the DRAM Frequency.
I understadn the DRAM is correct cause its 2X for DDR but the Uncore frequency should be the same right?
Under SPD for each slot the values are the same.

On another post with someone with the same memory as i have their CPU-Z screenshot looks like this:


What could be causing this?
 

kanewolf

Titan
Moderator
Hi Everyone

So strange thing I see and cant find someone with something similar.
I have the following RAM:
VENGEANCE® LPX 32GB (4 x 8GB) DDR4 DRAM 3600MHz C18 Memory Kit - Black

I have XMP enabled on my Aorus B450 Pro.
In Windows 11 it shows 3600Mhz:



On CPU-z however it shows the following:


Under "Uncore Frequency" its showing half the DRAM Frequency.
I understadn the DRAM is correct cause its 2X for DDR but the Uncore frequency should be the same right?
Under SPD for each slot the values are the same.

On another post with someone with the same memory as i have their CPU-Z screenshot looks like this:


What could be causing this?
CPUz is reporting the same data. The clock speed is 1800Mhz, but DDR - double data rate RAM transfers data twice per clock so the effective transfer rate is 3600. Everything is working as it should.
 
Dec 8, 2021
3
0
10
0
CPUz is reporting the same data. The clock speed is 1800Mhz, but DDR - double data rate RAM transfers data twice per clock so the effective transfer rate is 3600. Everything is working as it should.
I hear you but why is the uncore frequency 1/4 of the actual frequency? it should be the same as the DRAM frequency.
 
Uncore is the parts of the processor that connect the CPU and iGPU to the other parts of the system. It runs independently of any other frequency in the processor and is not strictly tied to the memory clock frequency (unlike AMD's IF).

It's nothing to worry about and is merely coincidental it's half the DRAM speed.
 
Dec 8, 2021
3
0
10
0
Uncore is the parts of the processor that connect the CPU and iGPU to the other parts of the system. It runs independently of any other frequency in the processor and is not strictly tied to the memory clock frequency (unlike AMD's IF).

It's nothing to worry about and is merely coincidental it's half the DRAM speed.
I have a Ryzen 7 3900X. no integrated graphics.
 

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