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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
Series: A-Series Trinity
AMD A10-4600M (compare)2300 - 3200 MHz4 / 4
AMD A10-4657M (compare)2300 - 3200 MHz4 / 4
AMD A10-4655M (compare)2000 - 2800 MHz4 / 4
AMD A8-4500M (compare)1900 - 2800 MHz4 / 4
AMD A8-4557M (compare)1900 - 2800 MHz4 / 4
AMD A8-4555M (compare)1600 - 2400 MHz4 / 4
AMD A6-4400M (compare)2700 - 3200 MHz2
AMD A4-4300M (compare)2500 - 3000 MHz2
» AMD A6-4455M2100 - 2600 MHz2
AMD A4-4355M (compare)1900 - 2400 MHz2
Clock Rate2100 - 2600 MHz
Level 2 Cache2 MB
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
GPUAMD Radeon HD 7500G (327 - 424 MHz)
64 Bit64 Bit support
Announcement Date05/15/2012

Benchmarks

Cinebench R11.5 - CPU Multi 64Bit
min: 0.85     avg: 0.9     median: 0.9 (4%)     max: 0.87 Points
Cinebench R11.5 - CPU Single 64Bit
min: 0.53     avg: 0.6     median: 0.6 (26%)     max: 0.63 Points
Cinebench R10 - Rendering Single 32Bit
min: 1594     avg: 1742     median: 1689 (20%)     max: 1943 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 2578     avg: 2593.7     median: 2601 (5%)     max: 2602 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 3578     avg: 3596.3     median: 3593.5 (5%)     max: 3620 Points
Cinebench R10 - Rendering Single CPUs 64Bit
min: 2172     avg: 2459     median: 2602 (29%)     max: 2603 Points
wPrime 2.0x - 1024m *
min: 1950     avg: 2009.4     median: 1974.7 (23%)     max: 2103.55 seconds
wPrime 2.0x - 32m *
min: 58.9     avg: 62     median: 61.8 (12%)     max: 65.179 seconds
X264 HD Benchmark 4.0 - Pass 2
5.7 fps (4%)
TrueCrypt - AES Mean 100MB
0.5 GB/s (3%)
3DMark 06 - CPU
min: 1348     avg: 1359.3     median: 1358.5 (11%)     max: 1372 Points
Super Pi mod 1.5 XS 1M *
min: 37.113     avg: 39.8     median: 37.3 (8%)     max: 45 Seconds
Super Pi mod 1.5 XS 2M *
min: 84.537     avg: 90.7     median: 85.7 (4%)     max: 102 Seconds
Super Pi Mod 1.5 XS 32M *
min: 2194.03     avg: 2349.4     median: 2196.1 (10%)     max: 2658 Seconds
SiSoft Sandra Dhrystone (MIPS)
min: 15.46     avg: 9615.2     median: 13880 (7%)     max: 14950 MIPS
SiSoft Sandra Whetstone (MFLOPS)
min: 9.24     avg: 6385.8     median: 9400 (7%)     max: 9748 MFLOPS
Windows 7 Experience Index - Processor
min: 4.7     avg: 4.8     median: 4.8 (61%)     max: 4.8 points
3DMark Vantage - P CPU no PhysX 1280x1024
min: 2596     avg: 2683.3     median: 2690.5 (5%)     max: 2756 Points
3DMark 11 - Performance Physics 1280x720
min: 1127     avg: 1184.3     median: 1212 (7%)     max: 1214 points
3DMark - Fire Strike Physics 1920x1080
957 Points (4%)
Geekbench 2 - 32 Bit - Total Score
min: 2697     avg: 2728     median: 2728 (10%)     max: 2759 Points
- 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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