Something changed with this driver and my ability to overclock the memory on my 3090.
I believe they changed the thermal limit of the memory, reducing it significantly.
With previous drivers, I was able to run my memory at 10350mhz under full stress-test load. With the new driver, I pretty much have to run stock at 9501mhz. Even a slight overclock will cause my card to throttle for Thermal PerfCap reason according to GPUz.
NVIDIA does not allow us to see the memory temperature, nor the memory temperature limit. I believe this is because it runs way too hot, basically at the limit of the spec of the memory, and they want to hide this fact. There is indeed a thermal sensor on the memory though, and there is indeed a thermal limit for the memory. This limit is separate from the GPU thermal limit. This is very easy to prove. My GPU runs at 55C under full load with a thermal limit of 83C. So I am no where near the thermal limit. At stock speeds, GPUZ will show the PerfCap reason as "Pwr". When I overclock the memory, it will eventually slow the whole card down and the PerfCap Reason will change to Thermal. Performance takes a giant nose dive of course when this happens.
This driver has caused me to take a massive performance hit by the stealth change to the secret memory thermal limit. I actually have two different 3090s from two different manufacturers. They both suffer the same fate from this new driver.
I mine ETH with these cards, and this new driver is literally costing me money...
If you are running with a high memory overclock, or hell, even ANY memory overclock, run a stress-test or mine some ETH and see what GPUz says in the "Sensors" tab for PerfCap Reason. I bet you will not be happy.
I believe they changed the thermal limit of the memory, reducing it significantly.
With previous drivers, I was able to run my memory at 10350mhz under full stress-test load. With the new driver, I pretty much have to run stock at 9501mhz. Even a slight overclock will cause my card to throttle for Thermal PerfCap reason according to GPUz.
NVIDIA does not allow us to see the memory temperature, nor the memory temperature limit. I believe this is because it runs way too hot, basically at the limit of the spec of the memory, and they want to hide this fact. There is indeed a thermal sensor on the memory though, and there is indeed a thermal limit for the memory. This limit is separate from the GPU thermal limit. This is very easy to prove. My GPU runs at 55C under full load with a thermal limit of 83C. So I am no where near the thermal limit. At stock speeds, GPUZ will show the PerfCap reason as "Pwr". When I overclock the memory, it will eventually slow the whole card down and the PerfCap Reason will change to Thermal. Performance takes a giant nose dive of course when this happens.
This driver has caused me to take a massive performance hit by the stealth change to the secret memory thermal limit. I actually have two different 3090s from two different manufacturers. They both suffer the same fate from this new driver.
I mine ETH with these cards, and this new driver is literally costing me money...
If you are running with a high memory overclock, or hell, even ANY memory overclock, run a stress-test or mine some ETH and see what GPUz says in the "Sensors" tab for PerfCap Reason. I bet you will not be happy.