AMD Ryzen Threadripper 3990X FAQ
Is my X399 TR4 board compatible with the 3990X?
Here are links to some TRX40 boards we’ll be carrying on launch:
Asus ROG Zenith II Extreme:
MSI TRX40 Creator:
Gigabyte TRX40 Aorus Xtreme:
Will I need a BIOS update for my motherboard to use the new 3990X?
Here are links to the CPU support lists for the boards listed above:
Asus ROG Zenith II Extreme:
MSI TRX40 Creator: https://www.msi.com/Motherboard/support/Creator-TRX40#support-cpu
Gigabyte TRX40 Aorus Xtreme: https://www.gigabyte.com/us/Motherboard/TRX40-AORUS-XTREME-rev-10/support#support-cpu
What are the cooling requirements for Threadripper 3990X series?
Here are links to AIO kits we carry:
Corsair H150I Pro 360mm:
NZXT Kraken X72 360mm RGB:
EVGA CLC 360 360mm RGB:
EKWB P360 360mm:
What memory speeds are supported?
ASUS: Change this on the “AI Tweaker” tab. Under “AI Overclock Tuner” select “D.O.C.P Standard”.
MSI: Change this under Settings > OC > A-XMP. Select the profile. Choose profile one. There may be two. Generally the second profile is a low latency rather than high frequency profile.
Gigabyte: Change this under the “Tweaker” menu. Change “Extreme Memory Profile(X.M.P) to profile one.
What are the power supply requirements?
Here is a link to the PSU we used on our build:
Will I need more than one EPS12V power cable connected?
We attached a picture below with the three connectors highlighted.
How many PCIe lanes are supported on this platform?
Here is a link to an article that explains why a large number of PCIE lanes can be extremely important:
What is CCD?
What is IOD?
What is the SMU?
What is Infinity Fabric?
Here is a link to a document on the Infinity Architecture from AMD:
What is SoC?
What is CPPC2?
Is the 3990X good for gaming?
What applications is the 3990X designed for?
Does Windows support 64 cores?
What socket does the 3990X use?
Can the 3990X be overclocked?
Does the 3990X need to be watercooled?
How much RAM do I need and does it require quad channel RAM kits?
Do I need to use a PCIE4 M.2 SSD?
How fast is the 3990X?
I see many different kinds of memory such as dual channel and quad channel with various capacities, speeds and latencies. What works best with my 3990X processor, and is it okay to mix brands?
Memory sold as dual or quad channel simply certifies that each DIMM is binned to work alongside one another in that configuration. You can use multiple dual channel kits and run them in a quad channel configuration, however we recommend quad channel kits to make sure each DIMM is binned to perform equally. For capacity, we recommend at least 128GB of RAM for the 3990X due to it’s many cores/threads. We recommend using a 3200mhz kit that has been verified to work on the board. Consult the motherboards Qualified Vendors List: https://www.asus.com/Motherboards/ROG-Zenith-II-Extreme-Alpha/HelpDesk_QVL_Memory/. You can mix brands and it may work, however we do not recommend doing so as different brands may use different DRAM manufacturers, and the different types of DRAM require different subtimings. Mixing brands can result in instability or a performance penalty.