AMD Ryzen 9 3900X is a capable processor, packing the same performance as the older entry-level Threadripper. A significant difference here is the 3900X is supported by non-Threadripper chipsets, allowing you to install it on consumer-grade motherboards.
Ryzen RAMCorsair Vengeance LPX 16GB KitEditor's pick

The Ryzen 3900X works well with RAM clocked at 3200MHz, and this kit from Corsair houses two 8GB modules. It's also rather affordable, making it an ideal addition to your PC build.
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