Extra cache, but no extra clocks.
AMD's Ryzen 7 5800X3D doesn't appear to be overclockable
Official overclocking support is allegedly coming to the Ryzen 7
5800X3D Undervolting / Negative C.O. Settings, Page 2
AMD Ryzen 7000 X3D CPUs With 3D V-Cache Are Unlocked For Overclocking
AMD has 10 new CPUs launching in April, including Ryzen 7 5800X3D
AMD Ryzen 7 5800X3D reportedly does not support overclocking (yet
Upgraded to a 5800x3D, used Curve Optimizer in BIOS for the first
AMD Ryzen 7 5800X3D review
SkatterBencher #39: AMD Ryzen 7 5800X3D Overclocked to 4741 MHz
Memory overclocking being blamed for AMD Ryzen chips burning
AMD Ryzen 7 5800X3D details leak, and there's some bad news
AMD Ryzen 7000X3D Processors Prone to Physical Damage with Voltage
AMD says overclocking blows a hidden fuse on Ryzen Threadripper
5800X3D Owners, Page 341