THE STARTING POINT FOR PC GAMING PROCESSORS
They are similar to existing G-series processors but exclude integrated graphics. AMD says both CPUs are the company's new baseline for folks building gaming PCs with a discrete GPU. Both processor are for the state-of-the-art Socket AM5 platform, upgradable for years to come!

General Specifications
AMD Ryzen™ 5 8400F
Series: Ryzen 8000 Series
Form Factor: Desktops
AMD PRO Technologies: No
Regional Availability: Global
Former Codename: Phoenix
Architecture: Zen 4
# of CPU Cores: 6
Multithreading (SMT): Yes
# of Threads: 12
Max. Boost Clock : Up to 4.7 GHz
Base Clock : 4.2 GHz
L2 Cache: 6 MB
L3 Cache: 16 MB
Default TDP: 65W
AMD Configurable TDP (cTDP): 45-65W
Processor Technology for CPU Cores: TSMC 4nm FinFET
CPU Compute Die (CCD) Size: 178mm²
Unlocked for Overclocking  ;Yes
AMD EXPO™ Memory Overclocking Technology: Yes
Precision Boost Overdrive: Yes
Curve Optimizer Voltage Offsets: Yes
AMD Ryzen™ Master Support: Yes
CPU Socket: AM5
CPU Boost Technology: Precision Boost 2
Instruction Set: x86-64
Supported Extensions: AES , AMD-V , AVX , AVX2 , AVX512 , FMA3 , MMX-plus , SHA , SSE , SSE2 , SSE3 , SSSE3 , SSE4.1 , SSE4.2 , SSE4A , x86-64
Max. Operating Temperature (Tjmax): 95°C
*OS Support: Windows 11 - 64-Bit Edition , Windows 10 - 64-Bit Edition , RHEL x86 64-Bit , Ubuntu x86 64-Bit
Connectivity
Native USB 4 (40Gbps) Ports: 2
Native USB 3.2 Gen 2 (10Gbps) Ports: 2
Native USB 2.0 (480Mbps) Ports: 1
PCI Express® Version: PCIe® 4.0
Native PCIe® Lanes (Total/Usable): 20 , 16
NVMe Support: Boot , RAID0 , RAID1
System Memory Type: DDR5
Memory Channels: 2
Max. Memory: 256 GB
System Memory Subtype: UDIMM
Max Memory Speed
2x1R    DDR5-5200
2x2R    DDR5-5200
4x1R    DDR5-3600
4x2R    DDR5-3600