AMD A8-4555M vs AMD A6-4400M

AMD A8-4555M

► remove 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.

AMD A6-4400M

► remove AMD A6-4400M

The AMD A6-4400M is a mobile 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 2.7 GHz CPU (up to 3.2 GHz w/ Turbo Core) with a Radeon HD 7520G 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 A6-4400M includes only one module with two integer-cores and one 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 A6-4400M performs similar to the Llano-based A4-3330MX. Single-threaded workloads can especially benefit from the new architecture and the updated Turbo Core functionality. If compared to Intels Pentium-series, the A6-4400M offers less performance in most cases. 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.

The integrated DirectX 11-compatible Radeon HD 7520G offers only 192 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 7520G 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 A6-4400M APU is rated at 35 Watt TDP and is therefore comparable to dual-core Ivy Bridge processors. Consequently, the A6-4400M is best suited for 14-inch notebooks or larger.

AMD A8-4555MAMD A6-4400M
AMD A-SeriesAMD A-Series
TrinityTrinity
: 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 A8-4555M1600 - 2400 MHz4 / 4
AMD A6-4400M2700 - 3200 MHz2
AMD A4-4300M (compare)2500 - 3000 MHz2
AMD A6-4455M (compare)2100 - 2600 MHz2
AMD A4-4355M (compare)1900 - 2400 MHz2
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 A8-4555M1600 - 2400 MHz4 / 4
» AMD A6-4400M2700 - 3200 MHz2
AMD A4-4300M (compare)2500 - 3000 MHz2
AMD A6-4455M (compare)2100 - 2600 MHz2
AMD A4-4355M (compare)1900 - 2400 MHz2
1600 - 2400 MHz2700 - 3200 MHz
4 MB1 MB
4 / 42
19 35
1303 1303
32 32
246 mm2246 mm2
SSE (1, 2, 3, 3S, 4.1, 4.2, 4A), x86-64, AES, AVX, FMASSE (1, 2, 3, 3S, 4.1, 4.2, 4A), x86-64, AES, AVX, FMA
iGPUAMD Radeon HD 7600G (320 - 424 MHz)AMD Radeon HD 7520G (496 - 685 MHz)

Cinebench R11.5 - CPU Multi 64Bit
min: 0     avg: 1.1     median: 1 (3%)     max: 1 Points
min: 0     avg: 1.1     median: 1 (3%)     max: 1 Points
Cinebench R11.5 - CPU Single 64Bit
0.5 Points (24%)
0.8 Points (40%)
Cinebench R10 - Rendering Single 32Bit
min: 1382     avg: 1506.7     median: 1555 (17%)     max: 1583 Points
min: 1829     avg: 2225.4     median: 2292 (25%)     max: 2384 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 3681     avg: 3753     median: 3757 (8%)     max: 3821 Points
min: 3096     avg: 3344.4     median: 3407 (7%)     max: 3413 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 3491     avg: 4831.5     median: 5170 (7%)     max: 5494 Points
min: 4161     avg: 4482.3     median: 4589 (6%)     max: 4590 Points
Cinebench R10 - Rendering Single CPUs 64Bit
min: 1593     avg: 1871     median: 1891 (18%)     max: 2109 Points
min: 2948     avg: 3063     median: 3069 (30%)     max: 3165 Points
wPrime 2.0x - 1024m *
min: 1230     avg: 1265.3     median: 1282 (15%)     max: 1284 seconds
min: 1399     avg: 1528.2     median: 1520 (18%)     max: 1672 seconds
wPrime 2.0x - 32m *
min: 37     avg: 41.6     median: 40 (8%)     max: 47 seconds
min: 42     avg: 47.1     median: 46 (9%)     max: 52 seconds
WinRAR - Result
min: 1468     avg: 1936.5     median: 1936 (23%)     max: 2405 KB/s
min: 1070     avg: 1353     median: 1353 (16%)     max: 1636 KB/s
X264 HD Benchmark 4.0 - Pass 2
min: 3     avg: 4.2     median: 4 (0%)     max: 5 fps
7.6 fps (0%)
X264 HD Benchmark 4.0 - Pass 1
min: 13     avg: 20.9     median: 20 (7%)     max: 28 fps
38.8 fps (14%)
TrueCrypt - Serpent Mean 100MB
0.1 GB/s (9%)
0.1 GB/s (8%)
TrueCrypt - Twofish Mean 100MB
0.2 GB/s (6%)
0.1 GB/s (4%)
TrueCrypt - AES Mean 100MB
0.8 GB/s (4%)
0.7 GB/s (3%)
3DMark 06 - CPU
min: 1197     avg: 1719.5     median: 1876 (13%)     max: 1928 Points
min: 1781     avg: 1800     median: 1804 (12%)     max: 1811 Points
Super Pi mod 1.5 XS 1M *
41 Seconds (9%)
min: 31     avg: 32.7     median: 31 (7%)     max: 36 Seconds
Super Pi mod 1.5 XS 2M *
min: 92     avg: 93.7     median: 94 (4%)     max: 95 Seconds
min: 70     avg: 73.3     median: 70 (3%)     max: 81 Seconds
Super Pi Mod 1.5 XS 32M *
min: 2456     avg: 2522.7     median: 2491 (11%)     max: 2621 Seconds
min: 1798     avg: 1847.9     median: 1806 (8%)     max: 1979 Seconds
SiSoft Sandra Dhrystone (MIPS)
min: 12110     avg: 20422     median: 24156 (11%)     max: 25000 MIPS
18210 MIPS (9%)
SiSoft Sandra Whetstone (MFLOPS)
min: 9000     avg: 13711.3     median: 15750 (12%)     max: 16384 MFLOPS
12380 MFLOPS (9%)
Windows 7 Experience Index - Processor
5.6 points (80%)
3DMark Vantage - P CPU no PhysX 1280x1024
min: 3310     avg: 3526.5     median: 3526 (5%)     max: 3743 Points
min: 3183     avg: 3308     median: 3304 (5%)     max: 3451 Points
3DMark 11 - Performance Physics 1280x720
min: 1097     avg: 1531     median: 1654 (9%)     max: 1719 points
min: 1193     avg: 1379.6     median: 1403 (7%)     max: 1512 points
3DMark - Ice Storm Standard Physics 1280x720
13531 Points (9%)
3DMark - Cloud Gate Standard Physics 1280x720
1004 Points (3%)

Average Benchmarks AMD A8-4555M → 100%

Average Benchmarks AMD A6-4400M → 107%

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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Redaktion, 2017-09- 8 (Update: 2017-09-11)