Because the stock cooloer is designed to also work with much higher wattage parts than an OC'd G3258, depending on how you faired in the silicon lottery, you can probably expect something around 4.5 GHz. It might go higher or not as high.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT