The AMD A9-9420 is an entry-level chip from the Stoney-Ridge APU series for notebooks (7th APU generation), which was announced mid 2016. At its launch, the A9-9420 is the fastest Stoney Ridge processor (dual-core version of Bristol Ridge) and takes over that place from the A9-9410 (-100 MHz CPU clock). It integrates two CPU cores (one Excavator module with 2 integer and on FP unit) clocked between 3 - 3.6 GHz. It also includes a Radeon R5 GPU with 192 shaders at 800 MHz as well as a single-channel DDR4-2133 memory controller, H.265 video engine and chipset with all I/O ports.
Architecture
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:
Performance
Thanks to the high maximum clock of up to 3.6 GHz, the single-core performance should be pretty good. The multi-core performance on the other hand is much lower compared to the Bristol Ridge models. Compared to older Carrizo-L/Beema quad-cores, the APU should still perform pretty well. The level of performance should be similar to a Core-m3 and therefore also be sufficient for more demanding applications.
The TDP can be configured between 10-25 Watts, so there can be big performance differences under sustained workloads.
Graphics Card
The integrated Radeon R5 (Stoney Ridge) GPU has 192 active shader units (3 compute cores) clocked at up to 800 MHz. More details about the GPU are available in the linked articles above.
Power Consumption
AMD specifies the TDP of the A9-9420 with 15 Watts, but it can be configured between 10-25 Watts. This means the CPU is a good choice for thin and light notebooks, but also 15-inch devices with better cooling capabilities.
| Series | AMD Bristol Ridge | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Codename | Stoney Ridge | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Series: Bristol Ridge Stoney Ridge
| |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Clock Rate | 3000 - 3600 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 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Socket | BGA | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Features | Single-Channel DDR4-2133, Virtualization, | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| GPU | AMD Radeon R5 (Stoney Ridge) ( - 800 MHz) | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| 64 Bit | 64 Bit support | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Architecture | x86 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Announcement Date | 06/01/2016 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
- Average benchmark values for this graphics card
HP 14-BW017AU : AMD Radeon R5 (Stoney Ridge), 14.00", 1.9 kg
External Review » HP 14-BW017AU
Asus VivoBook 15 X505BP-BR014T: AMD Radeon R5 M420, 15.60", 1.7 kg
External Review » Asus VivoBook 15 X505BP-BR014T
Asus VivoBook 15 F505BP-EJ156T: AMD Radeon R5 M420, 15.60", 1.7 kg
External Review » Asus VivoBook 15 F505BP-EJ156T
Lenovo Ideapad 320-15AST-80XV00V2SP: AMD Radeon R5 (Stoney Ridge), 15.60", 2.2 kg
External Review » Lenovo Ideapad 320-15AST-80XV00V2SP
Lenovo Ideapad 320-15AST-80XV00V4SP: AMD Radeon R5 (Stoney Ridge), 15.60", 2.2 kg
External Review » Lenovo Ideapad 320-15AST-80XV00V4SP
Lenovo Ideapad 320-15AST-80XV0100SP: AMD Radeon R5 (Stoney Ridge), 15.60", 2.2 kg
External Review » Lenovo Ideapad 320-15AST-80XV0100SP
Lenovo Ideapad 320-15AST-80XV00V3SP: AMD Radeon R5 (Stoney Ridge), 15.60", 2.2 kg
External Review » Lenovo Ideapad 320-15AST-80XV00V3SP
HP 14-BW002AX: AMD Radeon 520, 14.00", 1.9 kg
External Review » HP 14-BW002AX
HP 15-bw077ax: AMD Radeon R5 (Stoney Ridge), 15.60", 1.9 kg
External Review » HP 15-bw077ax
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Benchmarklist of all known CPUs that are used in laptops (desktop and laptop CPUs)
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