New build worried about temperatures

[ooch]

I am quite pleased with my new PC but temperatures are too high by the looks of it. The game sniper elite 5 is the main culprit . It raises temperatures higher than any bench mark or stress test after only 10 minutes of play. Will I need a better CPU cooler? In HW monitor what does CCD#0 refer to? This seems to be my highest temperature.
Here are my specs
be quiet! Dark Base 900 Full Tower Gaming Case
Asus ROG Crosshair VIII Hero Wi-Fi (AMD AM4) DDR4 X570 Chipset ATX Motherboard
AMD Ryzen 9 5900X Twelve Core 4.8GHz (Socket AM4) Processor
Gigabyte Radeon RX 6900 XT 16GB Gaming OC 16GB GDDR6 PCI-Express Graphics Card
be quiet! Pure Rock 2 Black CPU Cooler - 120mm
Kingston Fury Beast 32GB (2x16GB) DDR4 PC4-28800C18 3600MHz Dual Channel
be quiet! Straight Power 11 850W 80 Plus Platinum Modular Power Supply
MSI Optix MAG341CQ Curved Ultra-Wide Gaming Monitor

PC temp - Album on Imgur

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[ooch]

the case I have is brilliant for noise but air flow might be an issue as it's pretty enclosed.

The case is more focused on silence than airflow. Try removing the side panel and see how things improves, if improves.
The 6900XT will dump a huge amount of hot air inside the case. You need to find the best way to move that air before it chokes the CPU cooler.
You could improve the cooler, which is highly recommended, specially if the GPU is running at full power. Dark Rock Pro 4 is a fantastic cooler. Just make sure you have the clearance.

I have gone for the

Noctua NH-D15 chromax. I have fitted a couple of fans on top and one each side with the vents half open. I thought the be quiet! Dark Base 900 was designed for high end use despite being quiet? I did have a https://www.overclockers.co.uk/antec-1200-twelve-hundred-ultimate-gaming-case-black-ca-102-an.html which was great for cooling and price but noisy.​

 

[ooch]

The Noctua NH-D15S chromax.black CPU cooler with a fair few extra Be Quiet! silent wing 3 fans have sorted out the temperatures. I have just played Tropico 6 ( although not the most demanding game for CPU or GPU)for a few hours on ultra settings and the maximum temperatures were 69 degrees on the CPU. Fans stayed pretty much silent . Apparently, the AMD Ryzen 9 5900X can run pretty hot compared to intel. AMD has said temperatures could peak at 98 degrees for a short time.