AMD Ryzen 7 7800X3D + MSI Pro B650-S MB + 32GB G.Skill Flare X5 DDR5 6000 RAM Expired

This is the best deal I've seen for a 7800x3d bundle available for shipping (aka. not from microcenter) by a decent margin. This bundle is best suited for those building an upper-midrange gaming computer which will not be used for tasks more cpu demanding than gaming. Those who don't require top tier gaming performance would be best served finding a deal with a cheaper processor. Those who require a cpu with strong multithreaded performance for non-gaming productivity workloads (photo/video editing, code compiling, cpu based 3d rendering, etc.) would be best served by purchasing a dual chiplet amd cpu (ryzen 7900 or up) or an intel cpu (which have significantly higher multithreaded performance towards the lower end of their product stack compared to single chiplet amd cpus) according to their needs.

The 7800x3d is the best gaming cpu currently available, it's on average slightly faster than the 14900k in gaming while using on average 130w less power (total system usage) while gaming. The 7800x3d is an 8 core cpu which is sufficient for gaming for the next several years at least. It is not well suited as a productivity cpu, it's essentially a slower clocked and more efficient 7700x when used in most non-gaming tasks. The 7800x3d goes on sale as low as $340 from online retailers and as low as $300 from microcenter.
Hardware unboxed comparing the 7800x3d to the 14900k in gaming: https://www.youtube.com/watch?v=7KZQVfO-1Vg
Gamers nexus review of the 7800x3d including productivity benchmarks: https://www.youtube.com/watch?v=B31PwSpClk8

The msi pro b650-s motherboard seems to be a slightly cut down version of the msi pro b650-p motherboard which was available in microcenter's old version of their $500 7800x3d bundle. It's overall a lower-midrange b650 board with some of the standard compromises (no pcie gen5 support, only two m.2 slots, cheap realtek audio chip, less heatsink coverage, etc.) but should be entirely sufficient for the average user. Pcie gen5 support won't matter for most users for a few years at least. There have been complaints about slow boot times on msi b650 boards, supposedly newer bios updates have mitigated those issues to an extent, and memory context restore can be enabled without issue to drastically reduce boot times. A major advantage of building on the am5 platform is longevity, you'll be able to at minimum upgrade to a zen5 (and most likely zen6 as well) cpu while using the same motherboard and ram. The motherboard specs page can be found here: https://www.msi.com/Motherboard/P...cification

The ram in this bundle is something of a disappointment, being the standard cheap 32gb ddr5 6000 cl36 g.skill flare ram that most bundles (including microcenter's) contain. This ram uses samsung memory chips, which are all around worse than the hynix memory chips used in higher end memory, but are better than the micron chips used in very low end ddr5. Ram with samsung memory chips used to have major compatibility issues with the am5 platform, but bios updates have pretty much solved those issues by this point. The biggest current downside to using ram with samsung memory chips is the vastly inferior overclocking/manual tuning potential compared to hynix memory. If you'd just be sticking with base expo settings, then the performance difference with this ram compared to the recommended ddr5 6000 cl30 will be only a few percent on average in gaming at 1080p with a 4090. The reduced incidence of cache misses due to the massively increased L3 cache of the 7800x3d also play a role in reducing the impact. That being said, if you're willing to manually set timings, properly tuned hyinx ram would have a much larger performance delta compared to what you could achieve manually tuning the ram in this bundle.

Overall, if you don't live within driving distance of a microcenter and are looking to build an upper-midrange pc primarily for gaming, this is a very good deal.

There has not been any cpu+mb+ram bundle containing the 7800x3d for $400. I believe you are confusing this with the $400 7700x Microcenter bundle (microcenter bundles are in-store only). Back in November there was a very brief flash sale where microcenter had their 7800x3d bundle available for $470, it's been $500 ever since. This exact newegg bundle went frontpage at $500 ($5 more expensive than this deal) a bit over a week ago, and sold out extremely quickly: https://slickdeals.net/f/17241571-amd-ryzen-7-7800x3d-msi-pro-b650-s-mb-32gb-g-skill-flare-x5-ddr5-6000-ram-500-w-avatar-frontiers-of-pandora-pcdd-free-s-h