B450M DS3H

The Gigabyte B450M DS3H has socket AM4 and is compatible with AMD Ryzen 1000 to 5000 processors. AMD AM4 was AMD's longest-running platform, supporting Ryzen 1000 (2017) through Ryzen 5000 (2020) and even some Ryzen 5000XT. It uses DDR4 and, while it won't receive new processors, remains a capable gaming platform with Ryzen 5000.

The Gigabyte B450M DS3H with B450 chipset supports DDR4 memory. B450 motherboards typically include 4 DIMM slots with XMP 2.0/3.0 profile support. For maximum performance it is recommended to install modules in dual-channel configuration.

Yes. The B450 chipset is fully capable for high-performance gaming. The B450 is the entry chipset for AM4, compatible with Ryzen 1000 through 5000 (with BIOS update). No PCIe 4.0 support but fully functional for gaming with Ryzen 3000 and 5000 at a very competitive price. The difference between chipsets mainly affects overclocking options, the number of additional PCIe slots and USB/SATA ports — not the base performance of the processor, which is identical regardless of chipset on the same socket.

The answer depends on your needs. ATX provides more PCIe slots (ideal if you need multiple expansion cards, capture cards or additional SSDs), better cable management space and generally more rear connectivity options. Micro-ATX reduces the overall build size while keeping in most cases the same basic gaming features: one PCIe x16 slot for the GPU, 2-4 M.2 slots and enough USB ports. For pure gaming both form factors are equally capable.