Is RX 9070 VRAM temperature regular value or hotspot?

[droopyRO]

Do we know what nVidia reports on theirs?

On my 4070, it is under GPU Memory Junction Temperature in Hwinfo64, same for my 9070. I still have to decide if i keep it, it's a Powercolor Reaper 9070.
The GPU and GPU hot spot temps are great, but the vRAM goes to about 92ºC with 24ºC ambient. That means that in a few months it will go to about 100ºC since i have around 30-32ºC in my room in the summer months.

Now, *tin foil alert !
My 4070(Asus Dual) and my 9070 both draw about 200W, the 4070 is about 950 grams the 9070 is 860 grams. The Nvidia card is 10º hotter on the GPU core, but 10º cooler on the vRAM. How ?
The AMD card has PTM but no way that accounts to -10º while having the memory 10º hotter.
So, maybe AMD is under reporting the GPU temperature ? like on the first gen Ryzen there were two temperature readings for the CPU.

This are the two cards head-to-head

 

[rusty caterpillar]

On my 4070, it is under GPU Memory Junction Temperature in Hwinfo64, same for my 9070. I still have to decide if i keep it, it's a Powercolor Reaper 9070.
The GPU and GPU hot spot temps are great, but the vRAM goes to about 92ºC with 24ºC ambient. That means that in a few months it will go to about 100ºC since i have around 30-32ºC in my room in the summer months.

Now, *tin foil alert !
My 4070(Asus Dual) and my 9070 both draw about 200W, the 4070 is about 950 grams the 9070 is 860 grams. The Nvidia card is 10º hotter on the GPU core, but 10º cooler on the vRAM. How ?
The AMD card has PTM but no way that accounts to -10º while having the memory 10º hotter.
So, maybe AMD is under reporting the GPU temperature ? like on the first gen Ryzen there were two temperature readings for the CPU.

This are the two cards head-to-head

What particular 9070 you have?

Nvidia reporting maybe on top of the VRAM chip sensor while AMD is reporting the middle of the chip where is hotter, also PTM is only on GPU core not VRAM on AMD cards.
Also have to mention you might not have T pads in between B plate and PCB, some models doesn't have T pads.

Of course you can’t compare GPUs from different designers/manufacturers.
We know that on AMD the reported VRAM temp is Memory Junction, meaning the hottest spot of all chips.
Do we know what nVidia reports on theirs? …because we know already that they hid the GPU hotspot.

Yeah, that is said, the peak temp, in other words: the hottest VRAM chip reading on TJ(in the middle of the chip).

What if you take an conservative and expensive approach sensors placement: 3 sensors/ VRAM chip 1xTB +1XTJ + 1xTC and calculate an average

Taking Igor Diagram so 65+84+69= 218 /3 = 72.6 C a more reassuring value from the marketing point of view



Still TJ is good enough value for me, and more realistic, knowing the the high thermal resistance on GDDR6. Also maybe the GDDR6 was pushed to the limits on the 9000 series so we need the more realistic values instead of TC.

 

[AusWolf]

Of course you can’t compare GPUs from different designers/manufacturers.
We know that on AMD the reported VRAM temp is Memory Junction, meaning the hottest spot of all chips.
Do we know what nVidia reports on theirs? …because we know already that they hid the GPU hotspot.

It doesn't matter. Lower is better. So the winner is my GT 1030. It barely exceeds 50 °C on the GPU and who knows what on the VRAM. Best card ever! Highly recommended.

On my 4070, it is under GPU Memory Junction Temperature in Hwinfo64, same for my 9070. I still have to decide if i keep it, it's a Powercolor Reaper 9070.
The GPU and GPU hot spot temps are great, but the vRAM goes to about 92ºC with 24ºC ambient. That means that in a few months it will go to about 100ºC since i have around 30-32ºC in my room in the summer months.

Now, *tin foil alert !
My 4070(Asus Dual) and my 9070 both draw about 200W, the 4070 is about 950 grams the 9070 is 860 grams. The Nvidia card is 10º hotter on the GPU core, but 10º cooler on the vRAM. How ?
The AMD card has PTM but no way that accounts to -10º while having the memory 10º hotter.
So, maybe AMD is under reporting the GPU temperature ? like on the first gen Ryzen there were two temperature readings for the CPU.

This are the two cards head-to-head

Sure, but it also reports GPU hotspot, which is a more realistic value, imo. My Reaper XT does 61 °C on the GPU, 83 °C hotspot, and 88-90 °C VRAM.

Do you know how close the VRAM chips are on your 4070? It seems to me that AMD moved them very close to each other and to the GPU on the 9070.

 

[droopyRO]

No i never opened the card, i would loose the warranty. But TPU has pictures of it https://www.techpowerup.com/review/asus-geforce-rtx-4070-dual/3.html

Maybe, but measuring it would be hard without opening the cards or having good photos of both of them.

I wonder if that has anything to do with the temperatures.

 

[AusWolf]

No i never opened the card, i would loose the warranty. But TPU has pictures of it https://www.techpowerup.com/review/asus-geforce-rtx-4070-dual/3.html

I didn't mean opening the card, but pictures like that.

That GPU die looks pretty small, with a large interposer that seems to distance it from the VRAM chips a bit. I wonder if that has anything to do with the temperatures.