If you can afford it, do it. The 5950X is the best gaming and workstation consumer CPU available. It is the best CPU to pair with the 6900 XT and you’ll get SAM in every game also for an extra 5-10% additional performance in games.
Thanks everyone who gave input! I have the Ryzen 5950X shipping to me on Monday, and it will get here on Wednesday. I'll keep using my 32GB 3600 MHz CL16 Ram, and will set infinity fabric to 1800.
But, now I'm trying to decide what motherboard to pair it with. I'm considering the ASRock Taichi, or maybe an ASUS ROG Crosshair VIII Formula (same as my son's), or ASUS ROG Crosshair VIII Hero.
RECCOMENDATIONS?
With my new X570 I'd love to have similar or better features vs what I have in my current MSI MEG Godlike Z490. It supports PCIe 4.0 in the 1st two PCIe slots, but only has PCIe Gen 3.0 in the M.2 slots. For that reason, the Godlike came with a small PCIe 4.0 daughterboard that supports TWO Gen 4.0 x4 M.2 drives in PCIe slot 2. I'm using a pretty fast 2TB EVO plus so I don't use the M.2 daughterboard, but might get a faster M.2 like a Sabrent Rocket or 980 Pro someday. I really like the Godlike for the many USB 3.2 and Thunderbolt 3 ports, built-in Wifi 6, 10Gbps LAN (plus 1 Gb also), more fan and RGB headers than I'd ever need, Corsair's proprietary RGB headers, an OLED status screen, and RGB.
The Taichi I'm considering has enough USB 3.2 Gen 2 and Gen 2 type C for my needs, plus internal type-A and type-C for the front panel ports similar to my Godlike. It has three PCIe Gen 4 x16 slots and three Gen 4 x4 M.2 slots (ROG only has two M.2 Gen 4 slots). It's Wifi 6 module is in a key E slot, so it is upgradable to make it more future proof. And I can add a ASRock Thunderbolt 3 AIC R2.0 Card later if I need it. The Ethernet is only 2.5 Gbps, but I think that's as fast as my Asus GT11000AX Router with AX92U AI mesh nodes can run anyway. It's also got RGB on it. But I'm not sure how I feel about having a fan for the chipset, which I worry may get noisy.
Then I have to decide what to do with the old parts. I'll have the leftover 11700K and MSI Godlike, some old 3200 MHz CL16 16GB RAM, a 1TB 7200 RPM HGST drive, and an unused Liqtech RGB AIO. I could sell it off piece by piece; or I could buy a case, PSU, and SSD to build a complete PC if a system is easier to sell (or I could give the PC to my daughter's fiancé who has my old Xbox One S for gaming). I have a spare ASUS GTX 1080 that could go in the PC, if it's going to be used for gaming where integrated graphics wont be enough; but I'm keeping my spare ASUS 6700XT OC card. My brother has my old GTX 1070 with HIS 4th gen i7 8-core and Z97 board, and he's not complaining; but these parts could give him a nice upgrade, if he is willing to buy a bigger case and new PSU (he is broke and can't buy anything, and after building my PC I may soon be in the same boat if I don't sell my extra parts).