Confused about measured core clock, memory clock vs. advertised speeds

[Gill]

I have Gigabyte RTX3070 Aorus Ultra.

Based on their site: https://www.gigabyte.com/Graphics-Card/GV-N3070AORUS-M-8GD-rev-10-11/sp#sp

 

 

Yet, in GPU-Z I see:

 

What is this Memory clock 14000Mhz?

 

 

This is under small load:

 

So what are my GPU real/max clock speeds and memory speeds?

 

Thanks.

[AlexVRO10]

the real speeds are the ones from gpu-z. 14000mhz is the effective memory clock.

[Levent]

GDDR5X and GDDR6 has an effective memory speed multiplier of 8. So if your VRAM is clocked at 1750mhz, it would be 14000mhz effective clocks. Just like how DDR rams are multiplied by two to get their effective clocks.

[Jurrunio]

It's not 14000MHz on memory, it's 14000MT/s (T for transfers) memory (or 1.75GB/s theoretical bandwidth, since each transfer transfers a bit of data and 8 bits = 1 byte). GDDR6 is QDR (4x) and internal clock is half of the data bus clock, so internal memory clock is only one eighth of the transfer speed.

 

52 minutes ago, Gill said:

what are my GPU real/max clock speeds

Real clock speed is the GPU clock that changes frequently in software. You can check the max clock speed with the frequency/voltage graph's peak offered in software like Afterburner but you're most likely not going to hit that due to the voltage limit being hit first.

[Gill]

7 hours ago, Jurrunio said:

It's not 14000MHz on memory, it's 14000MT/s (T for transfers) memory (or 1.75GB/s theoretical bandwidth, since each transfer transfers a bit of data and 8 bits = 1 byte). GDDR6 is QDR (4x) and internal clock is half of the data bus clock, so internal memory clock is only one eighth of the transfer speed.

 

Real clock speed is the GPU clock that changes frequently in software. You can check the max clock speed with the frequency/voltage graph's peak offered in software like Afterburner but you're most likely not going to hit that due to the voltage limit being hit first.

What the recommened way to tweak that in afterburner so voltage is not limiting the highest peak gpu clock? (while staying stable)

[Mark Kaine]

Generally what gpuz shows you will be far exceeded under real conditions, ie games, etc.  

 

My card clocks at ~1950mhz at stock settings for example.

 

With undervolt 2025mhz, because it runs much cooler.

(RTX 3070 Vision OC)

[Jurrunio]

1 hour ago, Gill said:

What the recommened way to tweak that in afterburner so voltage is not limiting the highest peak gpu clock? (while staying stable)

You cant bypass Nvidia's voltage limit without flashing a LN2 BIOS and it's not available nowadays in public, which means you cant. Just overclock the normal way if you want more performance.

[Gill]

11 minutes ago, Jurrunio said:

You cant bypass Nvidia's voltage limit without flashing a LN2 BIOS and it's not available nowadays in public, which means you cant. Just overclock the normal way if you want more performance.

I don't want to overclock. I'm happy with the current speeds. I'm actually looking to under-volt without changing clock speeds to get more cooling.