The AMD A9-9425 is an entry-level chip from the Stoney-Ridge APU series for notebooks (7th APU generation), which was announced mid 2018. Compared to the one year older A9-9420, the 9425 has a 100 MHz higher CPU clock speed (base and boost) as well as a marginally faster iGPU. It integrates two CPU cores (one Excavator module with 2 integer and on FP unit) clocked at 3.1 GHz to 3.7 GHz. It also includes a Radeon R5 GPU with 192 shaders at up to 900 MHz as well as a single-channel DDR4-2133 memory controller, H.265 video decoder and chipset with all I/O ports.
Stoney Ridge is the successor of the Carrizo architecture and the design is almost identical. Thanks to optimized manufacturing processes and more aggressive Boost behavior, however, the clocks are a bit higher at the same power consumption. The memory controller now also supports DDR4-RAM, in this case up to 2133 MHz. Stoney Ridge is the designation for the smaller dual-core and single-core chip, while Bristol Ridge is the bigger quad-core chip with dual-channel memory controller. More technical details are available in the following articles:
The average 9425 in our database proves to be a rather slow CPU, its multi-thread benchmark scores only just matching those of Intel Core i3-4012Y. Much like with Intel Celerons, expect a system built around an A9-9425 to perform poorly in all but the most basic tasks.
The integrated Radeon R5 (Stoney Ridge) GPU has 192 active shader units (3 compute cores) clocked at up to 900 MHz. More details about the GPU are available in the linked articles above.
This AMD A9 processor has a default TDP of 15 W. Laptop manufacturers are free to change this value to anything between 10 W and 15 W, with clock speeds and performance changing correspondingly. Last but not the least, this APU is manufactured on a 28 nm process that's really, really old at this point (late 2022), making for terrible energy efficiency.
|Series||AMD Bristol Ridge|
Series: Bristol Ridge Stoney Ridge
|Clock Rate||3100 - 3700 MHz|
|Level 2 Cache||1 MB|
|Number of Cores / Threads||2 / 2|
|Power Consumption (TDP = Thermal Design Power)||15 Watt|
|Transistor Count||1200 Million|
|Manufacturing Technology||28 nm|
|Die Size||124.5 mm2|
|Max. Temperature||90 °C|
|Features||Single-Channel DDR4-2133, Virtualization,|
|GPU||AMD Radeon R5 (Stoney Ridge) ( - 900 MHz)|
|64 Bit||64 Bit support|
|Product Link (external)||AMD Bristol Ridge A9-9425|