AMD's Ryzen Threadripper 3990X is scheduled to hit shelves tomorrow. However, the 64-core monster is already available for pre-order at Amazon Canada for 5,476.91 CAD , which is about $4,120 (https://www.amazon.ca/advanced-micro-Ryzen-Threadripper-3990X/dp/B0815SBQ9W) .
The suggested e-tail price for the Threadripper 3990X is $3,990. Whether we get to see the processor at that price will depend hugely on AMD's supply and the market's demands.
The Threadripper 3990X is the flagship chip for AMD's third-generation Ryzen Threadripper family, which currently consists of the Ryzen Threadripper 3970X and 3960X . It's the first processor to bring 64 cores to a high-end desktop (HEDT) platform.
Built on AMD's Zen 2 microarchitecture, the Threadripper 3990X has 64 cores and 128 threads, and like all modern AMD offerings, it's a product of TSMC's 7nm FinFET manufacturing process.

The Threadripper 3990X has 256MB of L3 cache and 32MB of L2 cache, which is 288MB of total cache. The processor comes with a 2.9 GHz base clock and 4.3 GHz maximum boost clock.
The Threadripper 3990X boasts a plethora of useful features that will certainly appeal to content creators and professional users. The processor natively supports quad-channel DDR4-3200 RAM kits and offers 64 speedy PCIe 4.0 lanes to accommodate the latest PCIe 4.0 SSDs and graphics cards .
The Threadripper 3990X will fit just fine into current sTRX4 motherboards with the TRX40 chipset . As far as motherboard options are concerned, there's an abundance of options. However, choice of CPU cooling will be the most important aspect for Ryzen 3990X users. The 64-core part is rated for 280W, after all.