Had to replace my new AMD 6950 XT due to abnormal noise during performance of any high demand. The card had sudden shuttering when FPS dropped randomly. I ordered this 3090, so far not a peep during benchmarking, quiet and smooth through all gameplay. Benched higher too. So far, I'm happy with the product.

Fans aren't screaming, even maxed out; and keeps it reasonably cool.
The 3 fans blow most of the hot air out the sides into the case, rather than out the back.
There's very little clearance between my Noctua heatsink and the backplate, parasitically heating my cpu a bit. The backplate adds about 3mm above a standard slot, so something to be aware of before buying.

Excellent card for high-performance applications. Build quality is solid, high performance in any demanding task (gaming with RTX/4k, ML training, etc.)
However, it does not come without downsides. While it does offer great performance, the GDDR6X memory cooling is inadequate in high-load scenarios; it reaches almost 105-110 degrees. A thermal pad replacement can be helpful; although it really shouldn't require modification from the start.
Overall; it's a good high-end product that performs well, but it costs exponentially more than previous offerings.

Obviously this MSI 3090 is a great gaming card to get. It's a beast in terms of performance. The card itself is incredibly large and takes up 3 PCIe slots on your motherboard and also comes with a support frame to help hold it up in your case. It's incredibly tricky to get the support frame installed since it goes on top of the screws for your existing motherboard. And those PCI mesh grills that cover unused slots on your motherboard are incredibly tricky to hold steady when laying this frame on top to screw in.