AMD A8-4555M

Caution: The following information is still based on rumors and leaks (CPU World) as the CPU has yet to be announced.
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 should perform somewhere between the ULV Pentium and Core i3 series from Intel. Because of the lower frequency, the A8-4555M should be 15 - 20 % slower than the A10-4655M (25 W TDP). Nonetheless, CPU performance from the AMD processor should be 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 is therefore comparable to Intels ULV-processors. Consequently, the A8-4555M is best suited for thin-and-light notebooks.
| Series | AMD A-Series |
| Codename | Trinity |
| Clock Rate | 1600 - 2400 MHz |
| Level 2 Cache | 4096 KB |
| Number of Cores / Threads | 4 / 4 |
| Max. Power Consumption (TDP = Thermal Design Power) | 19 Watt |
| Transistor Count | 1303 Million |
| Manufacturing Technology | 32 nm |
| Die Size | 246 mm2 |
| Features | SSE (1, 2, 3, 3S, 4.1, 4.2, 4A), x86-64, AES, AVX, FMA |
| 64 Bit | 64 Bit support |
| Hardware Virtualization | AMD-V |
| Announcement Date | 10/01/2012 |
CPU Benchmarks
| Cinebench R10 in comparison | ||
| Intel Atom Z670 (min) | 691 | |
| ... | ||
| AMD Turion II M520 | 3647.4 | |
| AMD Athlon II P340 | 3647.5 | |
| Intel Core i5 520UM | 3670.3 | |
| AMD A-Series A8-4555M | 3719 | |
| AMD Athlon II P360 | 3728 | |
| Intel Core 2 Duo T7300 | 3732.5 | |
| AMD Athlon 64 X2 (Desktop) 4600+ | 3740 | |
| ... | ||
| Intel Core i7 (Desktop) 3960X (max) | 27189.5 | |
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
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




3 benchmarks and specifications
3 benchmarks and specifications