Last week at the IFA 2012 in Berlin, Lenovo released Ideapad S300, S400 and S405 notebooks. S300 and S400 were based on the Intel Ivy Bridge ULV processors, while the last one, S405 used the the new AMD Trinity processors, which have not been officially announced. These unannounced processors include AMD A4-4355M and A8-4555M. Also, check out AMD A8 4555m benchmark.
The A4 4355m is a dual core processor processor operating at 1.9GHz clock speed and features 1MB L2 cache. It is capable of reaching 2.4GHz thanks to AMD Turbo Core dynamic overclocking. The A4 uses AMD Radeon HD 7400G GPU.
The AMD A8 4555m is a quad core processor with 1.6GHz clock rate and 4MB L2 cache. Like the aforementioned A4 CPU, this A8 processor is also capable of reaching 2.4GHz. The A8 uses AMD Radeon HD 7600G GPU.