CPU: Ryzen 9 3950X
Cooler: Noctua D15
Motherboard: Gigabyte X570 Aorus Xtreme
RAM: 64GB Ballistix DDR4 3600MHz
Graphics: Gigabyte RX 5700 XT Gaming 8GB
NVME: Sabrent PCIe 4.0 1TB
Ethernet: Aquantia 10G lan and Gigabit Lan both work
Bluetooth: Internal Deactivated - Using this USB adapter
Wifi: Not working
Case: Fractal Define 7
For the most part, the Xtreme is very similar to the Master. Obviously the Xtreme does not have the PCH fan, and VRMs are supposed to be beefed up. Some of the internal headers are different too, Xtreme only has 1 internal USB2.0 port, Master has 2.
Overall, if you want a very quiet PC, it's worth the premium, especially if you use the Aquantia 10G lan. I run the 3 Noctua intake fans and 1 Noctua exhaust fan at approximately 550-600 rpm. The CPU cooler fans are about the same. The PC is virtually inaudible from about 1-2 ft away. Amazingly, the PCH temperature on the Xtreme is much lower without the fan (see attachments).
Both the Master and Xtreme benchmark about the same, so the only practical difference is the noise. I OC'ed the Xtreme and got 4.3 Ghz @ 1.3V. No issue whatsoever, and running benchmarks my temps were 60-65, on an air cooler... As expected, the single core numbers went up, multithread down.
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