Amazon.com: AMD Ryzen™ 9 9900X 12-Core, 24-Thread Unlocked Desktop Processor : Electronics

CPU has dead memory controller. would not memory train on first boot. Tried 2 different kinds of ram in every config as well as 2 different motherboards. Would not post even after memory training for over an hour

It is not that much better than a 7900x in most scenarios, but it runs so much cooler and after selling the Ryzen 7600 it is replacing, it will only cost me about $250 tops so If you are on the fence Id probably go 7900x because it is cheaper but there is a lot to be said for a lower tdp

This processor is a beast. I was burned by the Intel degradation issue and decided to replace my 13900K with a partial AM5 rebuild. I decided to go with the 9900X just to keep things a bit cooler.I’m getting better multithreaded pass mark results and better single core results. The AVX-512 implementation is phenomenal; the performance uplift for my HPC style workloads is averaging in the mid-double digit percentages for my particular codes. And all of this is while using 44% less power from the wall as measured by a Kill-a-watt! Even on mprime my Arctic Liquid Freezer 420 keeps this thing less than 70 degrees centigrade.The “Zen 5 percent” joke might be true if you only game. But you’d probably be holding out for the 3D cache part *anyway*. If you’re looking to build a cool, efficient productivity beast, this is the processor to buy. If you’re already on Zen 4 this may be a harder sell, waiting for Zen 6 might make a bit more sense. If you’re on AM4 or LGA1700, skip Zen 4 entirely and go right for Zen 5. I’m so glad I did.

This processor is pretty good and can handle heavy tasks

I am using an Msi 670E Gaming Plus Wifi mobo. I had an Amd 7700x CPU. Flashed bios and popped this 9900x in. After resetting bios. Up and running solid as a rock. Noticeable difference in EVERYTHING. I read that these 9000 were Meh. I did not need the upgrade. But I wanted it!. Runs COOLER. Runs FASTER. Cheap for what you get. I turn off Precision Overdrive so running at Base speed.They are coming out with a Win 11 update that will further optimize them so to me it is definitely worth the money.Beasty.