The AMD Ryzen 3 3250U is an entry-level, dual-core APU that was announced in 2020. The Ryzen features two Zen cores (SMT is enabled for a total of 4 threads) running at 2.6 GHz to 3.5 GHz and a Radeon RX Vega 3 graphics adapter (3 Compute Units = 192 unified shaders) running at up to 1,200 MHz. The specifications are similar to the older Ryzen 3 3200U, with the lower peak operating temperature of Ryzen 3 3250U (95 °C versus the 105 °C) being the only difference between the two.
AMD Ryzen 3 3250C is a special edition of Ryzen 3 3250U designed for use in Chromebooks. The specifications and performance figures appear to be identical between the two.
Architecture
Unlike the costlier Ryzen 5 3500U, Ryzen 3 3250U is not Zen+ based. It makes use of the ageing Zen architecture and is manufactured on the same 14 nm TSMC process as Ryzen 2000-series laptop-grade processors. This has several repercussions; the limited RAM support is one of them. DDR4-3200, DDR4-2933, DDR4-2666 modules are not supported here. It's just the DDR4-2400, DDR4-2133 and lower on.
The CPU has several PCI-Express 3.0 lanes and is thus compatible with NVMe SSDs (read/write rates will be limited to 3.9 GB/s) as well as discrete graphics cards. Ryzen 3 3250U gets soldered permanently on to the motherboard (FP5 socket interface) and is thus not user-replaceable.
Ryzen 3 3250U is an entry-level processor as of 2021. As far as multi-thread performance is concerned, this Ryzen directly competes with Intel Core i3-10110U, Core i3-1110G4 and AMD Athlon Gold 3150U. While not a powerhouse, the processor will happily handle mundane tasks such as web browsing and casual gaming.
Graphics
The Vega 3 is fairly close to Intel's UHD Graphics 620 as far as performance and capabilities go. The graphics adapter supports UHD 2160p monitors at 60 fps, and it can HW-decode VP9, AVC, HEVC, MPEG-2 and other popular video codecs. The latest AV1 codec is not supported, though. Such a video will have to be decoded via software, with the limited CPU horsepower imposing a hard limit on the resolution that can be played back without stuttering.
The Vega will allow for a bit of light gaming; F1 2021 runs well at 720p / Low, to give you an example. Quality RAM will allow for higher frame rates and the opposite is true as well; please keep in mind that Vega 3 has no VRAM of its own.
Power Consumption
Energy efficiency isn't great here. The Ryzen is built with a 14 nm manufacturing process which is obsolete as of late 2022.
The APU has a default TDP, also known as the long-term Power Limit, of 15 W. OEMs are free to reduce that value a little with 12 W being the lower limit, or give it a bump (up to 25 W are possible). Clock speeds and performance will change correspondingly as a result.
While not as power-hungry as a Ryzen 3 3100 or any other desktop-grade processor, Ryzen 3 3250U is still not likely to ever feature in a passively cooled laptop, tablet or mini-PC.