The performance is high, but the difference from the RM850x is noticeable.
The graph below depicts the cooling fan's average noise over the PSU's operating range, with an ambient temperature between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).
The overall noise output is very low. We would be highly impressed if there wasn't the RM750x, which is one of the quietest 750W units that money can buy today.
The following graph shows the PSU's average efficiency throughout its operating range with an ambient temperature close to 30 degrees Celsius.
The overall efficiency level is satisfactory, and higher than what the RM750x achieves.
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Best PSU reviewer , greetings from Greece.
Stay strong and healthy everybody.
Thank you for your kind words!
A 750w PSU is more than enough for a 3900x which itself will never really get over 150w, and an RTX 2080 super, but back to the theme I have the ROG Thor 850w and it is the best PSU I ever had in my 25 years having a PC. Asus is not cheap in any facet of hardware but the quality of their components is some of the best out there.
PC Parts Picker estimated the wattage of this build at 538W
MSI GeForce RTX 3070 Ventus 2X OC Gaming Graphics Card, 8GB GDDR6, PCIe 4.0, Ray Tracing, VR Ready, 3X DisplayPort 1.4, 1x HDMI 2.1 8K, DirectX 12 Ultimate, TORX Fan 3.0 w/ Mytrix HDMI CableIntel Core i9-10900X Desktop Processor 10 Cores up to 4.7GHz Unlocked LGA2066 X299 Series 165W (BX8069510900X)
SAMSUNG 970 EVO Plus SSD 2TB - M.2 NVMe Interface Internal Solid State Drive with V-NAND Technology (MZ-V7S2T0B/AM)
ASUS ROG Thor 850 Certified 850W Fully-Modular RGB Power Supply with LiveDash OLED Panel
Asus ROG Strix Helios GX601 RGB Mid-Tower Computer Case for up to EATX Motherboards with USB 3.1 Front Panel, Smoked Tempered Glass, Brushed Aluminum and Steel Construction, and Four Case Fans, Black
ASUS ROG Strix LC 360 RGB All-in-one AIO Liquid CPU Cooler 360mm Radiator, Intel 115x/2066 and AMD AM4/TR4 Support, Triple 120mm 4-pin PWM Fans (Addressable RGB Fans)
2x Corsair Vengeance RGB Pro 32GB (2x16GB) DDR4 3200 (PC4-25600) C16 Desktop Memory - Black (CMW32GX4M2C3200C16)
ASUS ROG Strix X299-E Gaming II ATX Gaming Motherboard (Intel X299) LGA 2066, Wi-Fi 6 (802.11ax), 2.5 GBS LAN, 8X DIMM Max. 256GB, USB 3.2 Gen 2, 8X SATA, 3X M.2, OLED and Aura Sync RGB