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AMD A8-4557M

AMD A8-4557M

The AMD A8-4557M is a mobile quad-core processor based on the Trinity architecture and the direct successor to the Llano A-series of APUs (Accelerated Processing Unit). The processing unit is manufactured in 32nm SOI and integrates a 1.9 GHz CPU (up to 2.8 GHz w/ Turbo Core) with a relatively fast Radeon HD 7640G GPU alongside a dual-channel memory controller, video decoders and a northbridge. The A8-4557M is the BGA version of the A8-4500M.

The CPU cores are based on a reworked Bulldozer architecture called Piledriver. Although marketed as a quad-core processor, the A8-4557M includes only two modules with four integer-cores and two floating-point cores total. As a result, the CPU is not a true quad-core processor.

When compared to previous Bulldozer cores, AMD has managed to improve upon the IPC (instructions per clock) performance of Trinity cores while allowing for higher clock frequencies. However, when compared to its Llano predecessor, the multithreaded performance of Trinity has only been slightly improved. The enhanced Turbo Core 3.0 feature performs well in speeding up single-threaded applications, although it still underperforms compared to Intel’s Turbo Boost equivalent. Regardless, AMD has managed to include other features as well, such as the AVX extension (including FMA) and support for AES encryption.

In terms of raw general performance, the A8-4557M performs similarly to the Llano-based A8-3500M. Single-threaded workloads can especially benefit from the new architecture and the updated Turbo Core functionality. If compared to Intel's Core-i3 series, the A8-4557M offers less performance in most cases. Nonetheless, CPU performance from the AMD processor should be sufficient for all daily workloads like Office, Internet browsing and even light video editing or gaming.

The integrated DirectX 11-compatible Radeon HD 7640G offers only 256 shader cores of the Trinity chip (7660G: 384) and, thanks to Turbo Core, will operate anywhere between 497 to 686 MHz depending on the current application demand. On average, the performance of the HD 7640G GPU is comparable to a dedicated Radeon HD 7610M and is faster than the HD Graphics 4000 as found on Intel’s Ivy Bridge platform.

The power consumption of the A8-4557M APU is rated at 35 Watt TDP and is therefore comparable to mid-range dual-core Ivy Bridge processors. Consequently, the A8-4557M is best suited for 14-inch notebooks or larger.

SeriesAMD A-Series
CodenameTrinity
Series: A-Series Trinity
AMD A10-4600M compare2300 - 3200 MHz4 / 4
AMD A10-4657M compare2300 - 3200 MHz4 / 4
AMD A10-4655M compare2000 - 2800 MHz4 / 4
AMD A8-4500M compare1900 - 2800 MHz4 / 4
» AMD A8-4557M1900 - 2800 MHz4 / 4
AMD A8-4555M compare1600 - 2400 MHz4 / 4
AMD A6-4400M compare2700 - 3200 MHz2
AMD A4-4300M compare2500 - 3000 MHz2
AMD A6-4455M compare2100 - 2600 MHz2
AMD A4-4355M compare1900 - 2400 MHz2
Clock Rate1900 - 2800 MHz
Level 2 Cache4 MB
Number of Cores / Threads4 / 4
Power Consumption (TDP = Thermal Design Power)35 Watt
Transistor Count1303 Million
Manufacturing Technology32 nm
Die Size246 mm2
SocketBGA
FeaturesSSE (1, 2, 3, 3S, 4.1, 4.2, 4A), x86-64, AES, AVX, FMA
GPUAMD Radeon HD 7640G (497 - 655 MHz)
64 Bit64 Bit support
Announcement Date05/15/2012

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Other CPUs of the series A-Series

» AMD A10-5750M
   4x 2.5 GHz - 3.5 GHz
» AMD A10-5757M
   4x 2.5 GHz - 3.5 GHz
» AMD A10-4600M
   4x 2.3 GHz - 3.2 GHz
» AMD A10-4657M
   4x 2.3 GHz - 3.2 GHz
» AMD A10-5745M
   4x 2.1 GHz - 2.9 GHz
» AMD A8-5550M
   4x 2.1 GHz - 3.1 GHz
» AMD A8-5557M
   4x 2.1 GHz - 3.1 GHz
» AMD A8-7410
   4x 2.2 GHz - 2.5 GHz
» AMD A8-3550MX
   4x 2 GHz - 2.7 GHz
» AMD A8-6410
   4x 2 GHz - 2.4 GHz
» AMD A6-7310
   4x 2 GHz - 2.4 GHz
» AMD A6-6310
   4x 1.8 GHz - 2.4 GHz
» AMD A8-3530MX
   4x 1.9 GHz - 2.6 GHz
» AMD A8-3510MX
   4x 1.8 GHz - 2.5 GHz
» AMD A4-7210
   4x 1.8 GHz - 2.2 GHz
» AMD A6-3430MX
   4x 1.7 GHz - 2.4 GHz
» AMD A8-3520M
   4x 1.6 GHz - 2.5 GHz
» AMD A10-4655M
   4x 2 GHz - 2.8 GHz
» AMD A8-4500M
   4x 1.9 GHz - 2.8 GHz
» AMD A8-4557M
   4x 1.9 GHz - 2.8 GHz
» AMD A6-3410MX
   4x 1.6 GHz - 2.3 GHz
» AMD A8-3500M
   4x 1.5 GHz - 2.4 GHz
» AMD A6-3420M
   4x 1.5 GHz - 2.4 GHz
» AMD A8-5545M
   4x 1.7 GHz - 2.7 GHz
» AMD A6-3400M
   4x 1.4 GHz - 2.3 GHz
» AMD A8-4555M
   4x 1.6 GHz - 2.4 GHz
» AMD A6-5350M
   2x 2.9 GHz - 3.5 GHz
» AMD A6-5357M
   2x 2.9 GHz - 3.5 GHz
» AMD A6-5200
   4x 2 GHz
» AMD A4-3330MX
   2x 2.2 GHz - 2.6 GHz
» AMD A4-5150M
   2x 2.7 GHz - 3.3 GHz
» AMD A6-4400M
   2x 2.7 GHz - 3.2 GHz
» AMD A4-4300M
   2x 2.5 GHz - 3 GHz
» AMD A4-6210
   4x 1.8 GHz
» AMD A4-5100
   4x 1.55 GHz
» AMD A4-5050
   4x 1.55 GHz
» AMD A4-5000
   4x 1.5 GHz
» AMD A10 Micro-6700T
   4x 1.2 GHz - 2.2 GHz
» AMD A4-3310MX
   2x 2.1 GHz - 2.5 GHz
» AMD A4-3320M
   2x 2 GHz - 2.6 GHz
» AMD E2-3800
   4x 1.3 GHz
» AMD A4-3300M
   2x 1.9 GHz - 2.5 GHz
» AMD A4-3305M
   2x 1.9 GHz - 2.5 GHz
» AMD A6-5345M
   2x 2.2 GHz - 2.8 GHz
» AMD A6-1450
   4x 1 GHz - 1.4 GHz
» AMD A4 Micro-6400T
   4x 1 GHz - 1.6 GHz
» AMD A6-4455M
   2x 2.1 GHz - 2.6 GHz
» AMD A4-5145M
   2x 2 GHz - 2.6 GHz
» AMD A4-4355M
   2x 1.9 GHz - 2.4 GHz
» AMD A4-1350
   4x 1 GHz
» AMD A4-1250
   2x 1 GHz
» AMD A4-1200
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Surrounding CPUs

+ Intel Core i7-660UM
   2x 1.33 GHz - 2.4 GHz
+ AMD A8-3520M
   4x 1.6 GHz - 2.5 GHz
+ AMD A6-9210
   2x 2.4 GHz - 2.8 GHz
+ AMD A10-4655M
   4x 2 GHz - 2.8 GHz
+ AMD A8-4500M
   4x 1.9 GHz - 2.8 GHz
» AMD A8-4557M
   4x 1.9 GHz - 2.8 GHz
- Intel Core 2 Duo P8400
   2x 2.26 GHz
- AMD Phenom II X4 P960
   4x 1.8 GHz
- AMD A6-3410MX
   4x 1.6 GHz - 2.3 GHz
- AMD A8-3500M
   4x 1.5 GHz - 2.4 GHz
- AMD A6-3420M
   4x 1.5 GHz - 2.4 GHz
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Klaus Hinum (Update: 2017-09- 5)