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AMD A8-4555M

AMD A8-4555M

The AMD A8-4555M is a mobile ultra-low-voltage (ULV) quad-core processor based on the Trinity architecture. Officially introduced in Q4 2012, it is the direct successor to the Llano A-series of APUs (Accelerated Processing Unit). The processing unit is manufactured in 32nm SOI and integrates a 1.6 GHz CPU (up to 2.4 GHz w/ Turbo Core) with a relatively fast Radeon HD 7600G GPU alongside a dual-channel memory controller, video de- and encoders and a northbridge.

The CPU cores are based on a reworked Bulldozer architecture, called Piledriver. Although marketed as a quad-core processor, the A8-4555M 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 functions well in speeding up single threaded performance, although it is still not on the same level as 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 A8-4555M performs somewhere between the ULV Pentium and Core i3 series from Intel. Because of the lower frequency, the A8-4555M is 15 - 20 % slower than the A10-4655M (25 W TDP). Nonetheless, CPU performance of the AMD processor is sufficient for all daily workloads like Office, Internet browsing and even light video editing or gaming.

The APU integrates a DirectX 11-compatible GPU called Radeon HD 7600G.

The power consumption of the A8-4555M APU is rated at 19 Watt TDP and therefore comparable to Intels ULV-processors. Consequently, the A8-4555M is best suited for thin-and-light notebooks.

SeriesAMD A-Series
CodenameTrinity

Series: A-Series Trinity

AMD A10-4600M compare2.3 - 3.2 GHz4 / 4 cores
AMD A10-4657M compare2.3 - 3.2 GHz4 / 4 cores
AMD A10-4655M compare2 - 2.8 GHz4 / 4 cores
AMD A8-4500M compare1.9 - 2.8 GHz4 / 4 cores
AMD A8-4557M compare1.9 - 2.8 GHz4 / 4 cores
AMD A8-4555M « 1.6 - 2.4 GHz4 / 4 cores
AMD A6-4400M compare2.7 - 3.2 GHzcores
AMD A4-4300M compare2.5 - 3 GHzcores
AMD A6-4455M compare2.1 - 2.6 GHzcores
AMD A4-4355M compare1.9 - 2.4 GHzcores
Clock Rate1600 - 2400 MHz
Level 2 Cache4 MB
Number of Cores / Threads4 / 4
Power Consumption (TDP = Thermal Design Power)19 Watt
Transistor Count1303 Million
Manufacturing Technology32 nm
Die Size246 mm2
FeaturesSSE (1, 2, 3, 3S, 4.1, 4.2, 4A), x86-64, AES, AVX, FMA
GPUAMD Radeon HD 7600G (320 - 424 MHz)
64 Bit64 Bit support
Architecturex86
Announcement Date10/01/2012

Benchmarks

Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 0.42     avg: 0.5     median: 0.4 (11%)     max: 0.57 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 1382     avg: 1507     median: 1555 (9%)     max: 1583 points
X264 HD Benchmark 4.0 - x264 Pass 2
min: 3.06     avg: 4.2     median: 4.2 (1%)     max: 5.35 fps
X264 HD Benchmark 4.0 - x264 Pass 1
min: 13.61     avg: 20.9     median: 20.9 (5%)     max: 28.18 fps
TrueCrypt - TrueCrypt Twofish
min: 0.163     avg: 0.2     median: 0.2 (3%)     max: 0.171 GB/s
TrueCrypt - TrueCrypt AES
min: 0.81     avg: 0.8     median: 0.8 (2%)     max: 0.822 GB/s
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
41 s (9%)
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
min: 92     avg: 93.7     median: 94 (4%)     max: 95 s
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
min: 2456     avg: 2523     median: 2491 (11%)     max: 2621 s
SiSoft Sandra Dhrystone (MIPS) - SiSoft Sandra Dhrystone (MIPS)
min: 12110     avg: 20422     median: 24156 (11%)     max: 25000 MIPS
SiSoft Sandra Whetstone (MFLOPS) - SiSoft Sandra Whetstone (MFLOPS)
min: 9000     avg: 13711     median: 15750 (12%)     max: 16384 MFLOPS
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

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Reviews for the AMD A8-4555M processor

 

Review Toshiba Satellite S955D-S5150 Notebook

Slimmer, lighter, better? Toshiba has placed their notebooks on a diet in the latest update to the S-series. But does the sleeker form factor translate to a bet...
AMD A8-4555M | AMD Radeon HD 7600G | 15.60" | 2.3 kg
 

Review HP Pavilion Sleekbook 15z-b000 Notebook

Ultra-affordable, semi-ultraportable. Hewlett-Packard’s latest 15-inch budget notebook is a slim one indeed—and it’s hard to find fault in its price. But is the...
AMD A8-4555M | AMD Radeon HD 7600G | 15.60" | 2.1 kg
 

Review Asus VivoBook U38DT Subnotebook

Flat beauty. The VivoBook U38DT is a 13-inch subnotebook that is powered by a Trinity processor and the brand new Radeon HD 8550M from AMD. The ultra-thin const...
AMD A8-4555M | AMD Radeon HD 8550M | 13.30" | 1.6 kg
 

Review Lenovo IdeaPad S405 Notebook

Couch potato. Lenovo's IdeaPad S405 comes with a Trinity quad-core and a light case and is very quiet. But, how do its dark glare-type display and its 32 Wh bat...
AMD A8-4555M | AMD Radeon HD 7600G | 14.00" | 1.6 kg

Asus VivoBook U38N-C4010H : AMD Radeon HD 7600G, 13.30", 1.6 kg
  External Review » Asus VivoBook U38N-C4010H

HP Pavilion TouchSmart 15-b168ca: AMD Radeon HD 7600G, 11.60", 2.5 kg
  External Review » HP Pavilion TouchSmart 15-b168ca

Toshiba Satellite L955D-S5140NR: AMD Radeon HD 7600G, 15.60", 2.3 kg
  External Review » Toshiba Satellite L955D-S5140NR

Asus VivoBook U38DT-R3001H: AMD Radeon HD 8550M, 13.30", 1.6 kg
  External Review » Asus VivoBook U38DT-R3001H

HP Pavilion Sleekbook 15z-b000: AMD Radeon HD 7600G, 15.60", 2.1 kg
  External Review » HP Pavilion Sleekbook 15z-b000

Acer Aspire V5-551: AMD Radeon HD 7600G, 15.60", 2.2 kg
  External Review » Acer Aspire V5-551

Lenovo IdeaPad S405: AMD Radeon HD 7600G, 14.00", 1.6 kg
  External Review » Lenovo IdeaPad S405

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» Mobile CPU Comparison
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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
   2x 1 GHz

Surrounding CPUs

+ Intel Core 2 Duo T6600
   2x 2.2 GHz
+ AMD Turion II P560
   2x 2.5 GHz
+ AMD Turion II N530
   2x 2.5 GHz
+ Intel Core 2 Duo T8100
   2x 2.1 GHz
+ AMD Phenom II X3 P820
   3x 1.8 GHz
» AMD A8-4555M
   4x 1.6 GHz - 2.4 GHz
- Intel Core 2 Duo T5900
   2x 2.2 GHz
- AMD Turion II Ultra M620
   2x 2.5 GHz
- Intel Core 2 Duo P7370
   2x 2 GHz
- Intel Core Duo T2700
   2x 2.33 GHz
> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > Benchmarks / Tech > Notebook Processors > AMD A-Series A8-4555M Notebook Processor
Klaus Hinum (Update: 2017-09- 5)