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AMD A6-4455M

AMD A6-4455M

The AMD A6-4455M is a mobile ultra-low-voltage (ULV) dual-core processor based on the Trinity architecture. Officially introduced in Q2 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 2.1 GHz CPU (up to 2.6 GHz w/ Turbo Core) with a Radeon HD 7500G 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 dual-core processor, the A6-4455M includes only one module with two integer-cores and and floating-point core. As a result, the CPU is not a true dual-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 A6-4455M performs significantly faster than the E-Series (e.g. E2-1800), but cannot compete with Intels ULV processors. Nonetheless, CPU performance from the AMD processor should be sufficient for all daily workloads like Office and Internet browsing, but will reach its limits in more demanding applications and multitasking.

The integrated DirectX 11-compatible Radeon HD 7500G offers only 256 shader cores of the Trinity chip (7660G: 384) and, thanks to Turbo Core, will operate anywhere between 360 to 497 MHz depending on the current application demand. On average, the performance of the HD 7500G GPU should be somewhere between the Llano-based Radeon HD 6620G and the HD Graphics 4000 as found in Intel’s Ivy Bridge.

The power consumption of the A6-4455M APU is rated at 17 Watt TDP and is therefore comparable to Intels ULV-processors. Consequently, the A6-4455M is best suited for thin-and-light notebooks.

SeriesAMD A-Series
CodenameTrinity
Clock Rate2100 - 2600 MHz
Level 2 Cache2048 KB
Number of Cores / Threads2
Max. Power Consumption (TDP = Thermal Design Power)17 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 Date05/15/2012

CPU Benchmarks

3DMark (2013): Fire Strike Standard Physics 1920x1080
0% 100%
min: 957     avg: 957 (4.76%)     max: 957 Points
3DMark (2013): Cloud Gate Standard Physics 1280x720
0% 100%
min: 738     avg: 738 (1.45%)     max: 738 Points
3DMark (2013): Ice Storm Standard Physics 1280x720
0% 100%
min: 9415     avg: 9415 (17.39%)     max: 9415 Points
Geekbench 2 - 32 Bit: Stream
0% 100%
min: 3442     avg: 3442 (35.95%)     max: 3442 Points
Geekbench 2 - 32 Bit: Memory
0% 100%
min: 2618     avg: 2618 (27.03%)     max: 2618 Points
Geekbench 2 - 32 Bit: Floating Point
0% 100%
min: 3030     avg: 3030 (17.93%)     max: 3030 Points
Geekbench 2 - 32 Bit: Integer
0% 100%
min: 2374     avg: 2374 (15.34%)     max: 2374 Points
Geekbench 2 - 32 Bit: Total Score
0% 100%
min: 2697     avg: 2728 (19.09%)     max: 2759 Points
TrueCrypt: Serpent Mean 100MB
0% 100%
min: 0.058     avg: 0.1 (2.26%)     max: 0.058 GB/s
TrueCrypt: Twofish Mean 100MB
0% 100%
min: 0.101     avg: 0.1 (4.52%)     max: 0.101 GB/s
TrueCrypt: AES Mean 100MB
0% 100%
min: 0.512     avg: 0.5 (5.34%)     max: 0.512 GB/s
X264 HD Benchmark 4.0: Pass 2
0% 100%
min: 5.73     avg: 5.7 (4.62%)     max: 5.73 fps
X264 HD Benchmark 4.0: Pass 1
0% 100%
min: 30.66     avg: 30.7 (12.26%)     max: 30.66 fps
WinRAR: Result
0% 100%
min: 865     avg: 865 (11.88%)     max: 865 KB/s
wPrime 2.0x: 1024m
0% 100%
min: 1950     avg: 2009.4 (77.44%)     max: 2103.555 seconds*
wPrime 2.0x: 32m
0% 100%
min: 58.9     avg: 62 (88.34%)     max: 65.179 seconds*
3DMark 11: Performance Physics 1280x720
0% 100%
min: 1127     avg: 1184.3 (8.97%)     max: 1214 points
3DMark Vantage: P CPU no PhysX 1280x1024
0% 100%
min: 2596     avg: 2683.3 (7.26%)     max: 2756 Points
3DMark 06 - CPU:
0% 100%
min: 1348     avg: 1359.3 (13.37%)     max: 1372 Points
Cinebench R11.5: CPU Single 64Bit
0% 100%
min: 0.53     avg: 0.6 (26.49%)     max: 0.63 Points
Cinebench R11.5: CPU Multi 64Bit
0% 100%
min: 0.85     avg: 0.9 (3.67%)     max: 0.87 Points
Cinebench R10: Rendering Single CPUs 64Bit
0% 100%
min: 2172     avg: 2459 (28.83%)     max: 2603 Points
Cinebench R10: Rendering Multiple CPUs 64Bit
0% 100%
min: 3578     avg: 3596.3 (10.12%)     max: 3620 Points
Cinebench R10: Rendering Single 32Bit
0% 100%
min: 1594     avg: 1742 (24.62%)     max: 1943 Points
Cinebench R10: Rendering Multiple CPUs 32Bit
0% 100%
min: 2578     avg: 2593.7 (7.46%)     max: 2602 Points
Super Pi mod 1.5 XS 1M:
0% 100%
min: 37.113     avg: 39.8 (93.09%)     max: 45 Seconds*
Super Pi mod 1.5 XS 2M:
0% 100%
min: 84.537     avg: 90.7 (96.91%)     max: 102 Seconds*
Super Pi Mod 1.5 XS 32M:
0% 100%
min: 2194.03     avg: 2349.4 (91.43%)     max: 2658 Seconds*
SiSoft Sandra Dhrystone (MIPS):
0% 100%
min: 15.46     avg: 9615.2 (4.56%)     max: 14950 MIPS
SiSoft Sandra Whetstone (MFLOPS):
0% 100%
min: 9.24     avg: 6385.7 (4.89%)     max: 9748 MFLOPS
Windows 7 Experience Index: Processor
0% 100%
min: 4.7     avg: 4.8 (51.59%)     max: 4.8 points
- Range of benchmarks for this CPU
- Average benchmark score

Reviews for the AMD A-Series A6-4455M processor

Acer Aspire V5-551-64454G50Makk (AMD Radeon HD 7500G, 15.6")
» Review Acer Aspire V5-551-64454G50Makk Notebook - Review

Acer Aspire V5-551-64454G50MASS (AMD Radeon HD 7500G, 15.6")
» Acer Aspire V5-551-64454G50MASS - External Review

Acer Aspire V5-551-6445G50 (AMD Radeon HD 7500G, 15.6")
» Acer Aspire V5-551-6445G50 - External Review

HP Envy 6-1006ea (AMD Radeon HD 7500G, 15.6")
» HP Envy 6-1006ea - External Review

HP Envy 6-1010eo (AMD Radeon HD 7500G, 15.6")
» HP Envy 6-1010eo - External Review

HP Envy 6z-1000 (AMD Radeon HD 7500G, 15.6")
» HP Envy 6z-1000 - External Review

HP Envy SleekBook 6-1010us (AMD Radeon HD 7500G, 15.6")
» HP Envy SleekBook 6-1010us - External Review

HP Envy Sleekbook 6-1126sa (AMD Radeon HD 7500G, 15.6")
» HP Envy Sleekbook 6-1126sa - External Review

Lenovo IdeaPad S405-59361281 (AMD Radeon HD 7500G, 14.0")
» Lenovo IdeaPad S405-59361281 - External Review

Samsung 535U3C (AMD Radeon HD 7500G, 13.3")
» Review Samsung Series 5 535U3C Notebook - Review
» Samsung 535U3C - External Review

Samsung 535U3C-A01UK (AMD Radeon HD 7500G, 13.3")
» Samsung 535U3C-A01UK - External Review

Samsung 535U3C-A01US (AMD Radeon HD 7500G, 13.3")
» Samsung 535U3C-A01US - External Review

Samsung 535U3C-A02UK (AMD Radeon HD 7500G, 13.3")
» Samsung 535U3C-A02UK - External Review

Samsung 535U4C (AMD Radeon HD 7550M, 14.0")
» Review Samsung Series 5 535U4C Notebook - Review
» Samsung 535U4C - External Review

Toshiba Satellite L955D-108 (AMD Radeon HD 7500G, 15.6")
» Toshiba Satellite L955D-108 - External 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 A8-3550MX
   2 GHz / 4 MB
» AMD A-Series A8-6410
   2 GHz / 2 MB
» AMD A-Series A6-6310
   1.8 GHz / 2 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 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

- AMD Athlon X2 QL-60
   1.9 GHz / 1 MB
- Intel Pentium D 820
   2.8 GHz / 2 MB
- Intel Core 2 Duo T5500
   1.66 GHz / 2 MB
- Intel Core i5 430UM
   1.2 GHz / 0.5 MB + 3 MB
- Qualcomm Snapdragon 801 MSM8974AC
   2.45 GHz / 2 MB
» AMD A-Series A6-4455M
   2.1 GHz / 2 MB
+ AMD A-Series A4-5145M
   2 GHz / 1024 KB
+ AMD A-Series A4-4355M
   1.9 GHz / 2048 KB
+ Samsung Exynos 5430 Octa
   1.8 GHz / 512 + 2048 KB
+ Mediatek MT6595
   2.2 GHz / 2048 KB
+ Intel Celeron N2830
   2.16 GHz / 1024 KB
> Notebook / Laptop Reviews and News > FAQ / Tips / Technics > Notebook Processors > AMD A-Series A6-4455M Notebook Processor
Author: Klaus Hinum (Update: 2012-05-26)