I am getting no results with memory overclocking whatsoever on my 3090 FTW3 Ultra. Even just a +100 on mem gets me a crash lol. Seeing people do a +1000 makes me think something is up. I currently have a +100 GPU and +0 on memory. I will say the only games I have been playing are obscure. I have only played SnowRunner, Hitman 2, and AC: Odyssey. My temps never even hit 70c when fans are at 85%. I am extremely impressed with the cooling ability at such low noise (coming from a 1080ti Kingpin). At a +100 gpu she is almost always above 2000mhz sometimes pushing 2100mhz