Update: AMD has now officially launched the Renoir G-Series APUs, which you can see here.
Built on TSMC's 7nm FinFET node, the Ryzen 4000-series APUs bring all the benefits of AMD's Zen 2 microarchitecture. Vendors have taken particular interest in the U-series, due to its 15W envelope. The APUs are energy-efficient and have low cooling requirements. This makes the chips fitting for slim AIO systems that pack all the components in the display's housing.
The U-series only has five SKUs but covers a lot of ground. With four CPU cores and four threads, the Ryzen 3 4300U is the entry-level chip. The Ryzen 5 4500U and Ryzen 5 4600U rock six cores, with the latter supporting Simultaneous Multithreading (SMT). The Ryzen 7 4700U and Ryzen 7 4800U come equipped with eight cores with the Ryzen 7 4800U having the advantage of SMT.
HP All-in-One 24-dp0203d and HP All-in-One 24-dp0202d
HP (via @GodpingZXZ) has listed the HP All-in-One 24-dp0203d and HP All-in-One 24-dp0202d on its Thailand website. The devices have a 23.8-inch 1080p panel with a maximum brightness of 250 nits. There's also a 1080p webcam and dual 2W speakers present. Wireless connectivity include Wi-Fi 5 and Bluetooth 4.2.
Both systems leverage the Ryzen 5 4500U that carries six cores at 2.3 GHz and a boost clock that climbs to 4 GHz. Despite having two SO-DIMM memory slots, HP only offers the PCs with a single memory module with the capacity of your choice.
On the other hand, the HP All-in-One 24-dp0202d is stuck with 4GB of DDR4-3200 memory, a 128GB TLC (triple-level cell) M.2 SATA SSD and 1TB hard drive. The PC sells for approximately $529.
Lenovo IdeaCentre AIO 520C
If the information from a Weibo post (via @davideneco25320) is accurate, Lenovo has prepared the new IdeaCentre AIO 520C. Similar to the two HP devices, the IdeaCentre AIO 520C flaunts a 23.8-inch IPS display with a Full HD resolution. Unlike HP, Lenovo reportedly went with the Ryzen 5 4600U for its AIO.
The Ryzen 5 4600U has the same six Zen 2 cores as the Ryzen 5 4500U but with the advantage of SMT. Ironically, the presence of SMT forces the Ryzen 5 4600U's base clock to run at 200 MHz slower than the Ryzen 5 4500U. However, the boost clock remains at 4 GHz.
The Ryzen 5 4600U is paired with include 16GB of dual-channel memory. Unfortunately, the Weibo user didn't specify the speed of the memory modules. There is mention of a 512GB SSD, but further details aren't available.
Thus far, there is no word on the pricing or availability for the IdeaCentre AIO 520C.