Memory Clock reported by GPU-Z and Nvidia performance overlay.

[Yafei]

For RTX 4070 super, the memory clock is 1312.7MHz reported by GPU-Z but is 10501 MHz by Nvidia performance overlay, 8 times larger. Does anyone know how to reconcile those two numbers?

Thanks.

 

[Caring1]

Wait for yet another Nvidia update to fix yet another bug.

 

[Dr. Dro]

Wait for yet another Nvidia update to fix yet another bug.

Not a bug, just a different scale of measurement. It's become a whole mess, with QDR, bandwidth per pin, etc. all being involved.

Basically, they both mean the same thing. 1312 MHz is the "real clock".

 

[oobymach]

10501mhz (x2) = 21002mhz actual speed,

1312.7 (x16) = 21003.2mhz actual speed.

Your vrams are running at 21ghz.

 

[natr0n]

reconciliation takes time

 

[Ruru]

VRAM clock speed is usually reported diffentially in different programs thanks to different DDR technologies.

 

[JWNoctis]

It gets even more confusing when (the last time I checked) MSI Afterburner let you downclock your VRAM by 300MHz, off an indicated 7000MHz effective value on a previous setup with 14GHz VRAM. It did take effect, but it's also a drop in a bucket for what I wanted to do back then.

 

[Yafei]

Hmm. With 7168 shading units and GPU boosting up to 2865MHz, I can claim that my SU is running at 20THz, right in the middle of inferred territory.

Joking aside, thanks everyone for replying.

 

[W1zzard]

Not a bug, just a different scale of measurement

Correct, GPU-Z will always show the underlying actual clock frequency, whereas more marketing oriented people will show you the highest number, i.e the "effective" clock rate, which in your case is 8 times higher, due to various techniques of transmitting more than one bit of data during each clock cycle. Google "double pumped" and "PAM4"