MSI B450M MORTAR MAX Motherboard mATX, AM4, DDR4, LAN, USB 3.2 Gen2, TYPE-C, M.2, Mystic Light Sync, HDMI, Display Port, AMD RYZEN 1st, 2nd and 3rd Gen Ready

Product Information

I know what a 2700X can do for gaming because my previous R5 3600 was around the same for gaming. Its not bad at all and could easily handle my RX5700XT which is about the same of the RX6600XT/RTX3060. That CPU cooler may be a problem, most AIO's only last 2-3 years before they start losing performance or just outright die - the 5700x for example would easily be cooled on a basic 120mm tower cooler, while the 5900x needs a larger one or another AIO Ports 1x M.2 PCIe 3.0 x4 32Gbps/SATA 6Gbps up to 2280, 1 x M.2 PCIe 2.0 x4 16Gbps up to 2280, 4 x SATA 6Gbps, 1 x USB 3.1 Type-A, 1 x USB 3.1 Type-C, 6 x USB 3.0 (2 via headers), 6 x USB 2.0 (4 via headers), 1 x LAN, audio out, line in, mic, Optical S/PDIF out You can always upgrade your GPU further down the road and this will upgrade your gaming experience more than any CPU or 32GB RAM will.

I don't see why you should be worried about worse performance. That should not be the case unless Windows is overflowing with gunk/half corrupt, or MSI somehow borked the specific BIOS revision you flashed. Do a clean install if you haven't in a while, make sure you get the latest chipset drivers, and be on a reasonably recent BIOS. Do a few simple benchmarks and if performance is roughly in the right place then there's nothing to worry about (e.g. 650/9500 CPU-Z, 1600/21k R23 etc) I'm not confident an aging AIO designed pre-AM4 would keep a 5900x in the happy temp ranges for max boosting)

x DisplayPort, support a maximum resolution of 4096x2304 @60Hz, 2560x1600 @60Hz, 3840x2160 @60Hz, 1920x1200 @60Hz

The 5700X will be much easier to cool with your cooler. Unless you want to upgrade cooling too go for 5700X. Phillips 32 32M1N5800A (4k144), LG 32" (4K60) | Gigabyte G32QC (2k165) | Phillips 328m6fjrmb (2K144) Gaming may be less demanding on cooling but still the 5900X can draw over 100W (PPT) of power on some games. 5700X may draw around half (maybe 60%) of what 5900X will for gaming. Military style with Extended heatsink design for better thermal solution, DDR4 Boost, Core Boost, Turbo M.2 and USB 3.2 Gen2 connector The other question I have, is if I'll be able to run 32GB of RAM at 3200Mhz (4x8GB), I seem to recall that it was not possible on this board, or at least on the 2700X. Is there a MSI expert in the house?

Specifications

is the better gaming choice with the single CCX design, the 5900x is better if you have multi threaded workloads or need the extra cache for something will be easy on B450, but not all will do any higher. I've ran into a few that won't do 3400 or above with quad rank, while x370 and x470 could with the same CPU and RAM.