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
Clock Rate1600 - 2400 MHz
Level 2 Cache4096 KB
Number of Cores / Threads4 / 4
Max. 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
64 Bit64 Bit support
Hardware VirtualizationAMD-V
Announcement Date10/01/2012

CPU Benchmarks

TrueCrypt: Serpent Mean 100MB
0% 100%
min: 0.091     avg: 0.1 (0.06%)     max: 0.094 GB/s
TrueCrypt: Twofish Mean 100MB
0% 100%
min: 0.163     avg: 0.2 (0.07%)     max: 0.171 GB/s
TrueCrypt: AES Mean 100MB
0% 100%
min: 0.81     avg: 0.8 (0.09%)     max: 0.822 GB/s
X264 HD Benchmark 4.0: Pass 2
0% 100%
min: 3.06     avg: 4.2 (2.79%)     max: 5.35 fps
X264 HD Benchmark 4.0: Pass 1
0% 100%
min: 13.615     avg: 20.9 (6.73%)     max: 28.18 fps
WinRAR: Result
0% 100%
min: 1468     avg: 1936.5 (26.62%)     max: 2405 KB/s
wPrime 2.0x: 1024m
0% 100%
min: 1230     avg: 1265.3 (86.37%)     max: 1284 seconds*
wPrime 2.0x: 32m
0% 100%
min: 37     avg: 41.6 (92.47%)     max: 47.7 seconds*
3DMark 11: Performance Physics 1280x720
0% 100%
min: 1097     avg: 1531 (11.59%)     max: 1719 points
3DMark Vantage: P CPU no PhysX 1280x1024
0% 100%
min: 3310     avg: 3526.5 (8.82%)     max: 3743 Points
3DMark 06 - CPU:
0% 100%
min: 1197     avg: 1719.5 (17.54%)     max: 1928 Points
Cinebench R11.5: CPU Single 64Bit
0% 100%
min: 0.42     avg: 0.5 (14.09%)     max: 0.57 Points
Cinebench R11.5: CPU Multi 64Bit
0% 100%
min: 0.78     avg: 1.1 (5.18%)     max: 1.24 Points
Cinebench R10: Rendering Single CPUs 64Bit
0% 100%
min: 1593     avg: 1871 (7.39%)     max: 2109 Points
Cinebench R10: Rendering Multiple CPUs 64Bit
0% 100%
min: 3491     avg: 4831.5 (11.12%)     max: 5494 Points
Cinebench R10: Rendering Single 32Bit
0% 100%
min: 1382     avg: 1506.7 (21.02%)     max: 1583 Points
Cinebench R10: Rendering Multiple CPUs 32Bit
0% 100%
min: 3681     avg: 3753 (10.79%)     max: 3821 Points
Super Pi mod 1.5 XS 1M:
0% 100%
min: 41     avg: 41 (92.95%)     max: 41 Seconds*
Super Pi mod 1.5 XS 2M:
0% 100%
min: 92     avg: 93.7 (96.86%)     max: 95 Seconds*
Super Pi Mod 1.5 XS 32M:
0% 100%
min: 2456     avg: 2522.7 (88.84%)     max: 2621 Seconds*
SiSoft Sandra Dhrystone (MIPS):
0% 100%
min: 12110     avg: 20422 (9.69%)     max: 25000 MIPS
SiSoft Sandra Whetstone (MFLOPS):
0% 100%
min: 9000     avg: 13711.3 (10.51%)     max: 16384 MFLOPS
- Range of benchmarks for this CPU
- Average benchmark score

Cinebench R10 in comparison
Intel Atom Z670 (min)
691 
...
Intel Celeron Dual-Core T3100
3740 
AMD Athlon 64 X2 (Desktop) 4600+
3740 
Intel Pentium Dual Core T4200
3750.9 
AMD A-Series A8-4555M
3753 
Intel Core 2 Duo T5800
3755 
Intel Core i3 2357M
3759 
Intel Core 2 Duo T7250
3770.8 
...
Intel Xeon (Desktop) E5-2697 v2 (max)
34776 

Reviews for the AMD A-Series A8-4555M processor

Acer Aspire V5-551 (AMD Radeon HD 7600G, 15.6")
» Acer Aspire V5-551 - External Review

Asus VivoBook U38DT-R3001H (AMD Radeon HD 8550M, 13.3")
» Review Asus VivoBook U38DT Subnotebook - Review
» Asus VivoBook U38DT-R3001H - External Review

Asus VivoBook U38N-C4010H (AMD Radeon HD 7600G, 13.3")
» Asus VivoBook U38N-C4010H - External Review

HP Pavilion Sleekbook 15z-b000 (AMD Radeon HD 7600G, 15.6")
» Review HP Pavilion Sleekbook 15z-b000 Notebook - Review
» HP Pavilion Sleekbook 15z-b000 - External Review

HP Pavilion TouchSmart 15-b168ca (AMD Radeon HD 7600G, 11.6")
» HP Pavilion TouchSmart 15-b168ca - External Review

Lenovo IdeaPad S405 (AMD Radeon HD 7600G, 14.0")
» Review Lenovo IdeaPad S405 Notebook - Review
» Lenovo IdeaPad S405 - External Review

Toshiba Satellite L955D-S5140NR (AMD Radeon HD 7600G, 15.6")
» Toshiba Satellite L955D-S5140NR - External Review

Toshiba Satellite S955D-S5150 (AMD Radeon HD 7600G, 15.6")
» Review Toshiba Satellite S955D-S5150 Notebook - Review

» Mobile CPU Comparison
Comparison of all mobile CPU series

» Mobile Processors - Benchmarklist
Benchmarklist of all known CPUs that are used in laptops (desktop and laptop CPUs)

Other CPUs of the series AMD A-Series

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

Surrounding CPUs

- Intel Core 2 Duo T6600
   2.2 GHz / 2 MB
- AMD Turion II P560
   2.5 GHz / 2 MB
- AMD Turion II N530
   2.5 GHz / 2 MB
- Intel Core 2 Duo T8100
   2.1 GHz / 3 MB
- AMD Phenom II X3 P820
   1.8 GHz / 1.5 MB
» AMD A-Series A8-4555M
   1.6 GHz / 4 MB
+ Intel Core 2 Duo T5900
   2.2 GHz / 2048 KB
+ AMD Turion II Ultra M620
   2.5 GHz / 2048 KB
+ Intel Core 2 Duo P7370
   2 GHz / 3072 KB
+ Intel Core Duo T2700
   2.33 GHz / 2048 KB
+ Intel Pentium Dual Core T4400
   2.2 GHz / 1024 KB
> Notebook / Laptop Reviews and News > FAQ / Tips / Technics > Notebook Processors > AMD A-Series A8-4555M Notebook Processor
Author: Klaus Hinum (Update: 2012-09-18)