AMD A4-4355M and A8-4555M APUs surface in Lenovo notebook
Last week at IFA electronics show in Berlin, Lenovo announced new IdeaPad notebooks, including three S series models: S300, S400, and S405. The S300 and S400 laptops will be based on Intel ULV CPUs, whereas the S405 will be shipped with three ultra low voltage AMD APUs with "Trinity" core. The most interesting part is that two out of three processors are not yet released. These are A4-4355M and A8-4555M. Basic specifications of both parts can be found in Hardware maintenance manual (PDF file) for the IdeaPad S405 notebook. We also spotted these SKUs in specifications of Samsung NP535U3C-A01, NP535U3C-S01 and NP535U4C-A02 laptops. Finally, we found part numbers of A4 and A8 ULV APUs, which allowed us to determine their approximate TDP, and confirm such characteristics as the number of cores and the size of L2 cache.
According to Lenovo manual, AMD A4-4355M is a dual-core processor with 1 MB L2 cache, 1.9 GHz stock and 2.4 GHz Turbo frequencies. The A8-4555M has 4 CPU cores and 4 MB L2 cache. The A8 APU operates at 1.6 GHz, or up to 2.4 GHz when the Turbo Core technology is activated. Both chips are produced in a BGA package.
Specifications of Samsung notebooks provide the same base frequency and L2 cache values. Additionally, they state that the A4-4355M integrates HD 7400G GPU, and the A8 chip has HD 7600G graphics. Thermal Design Power of both CPUs should be 17 Watt or close to it. This was deduced from processors' part numbers. To summarize the features, we put them into the table below:
| Model | Part number | Cores | Frequency | Turbo Frequency | L2 cache | Graphics | TDP |
|---|---|---|---|---|---|---|---|
| A4-4355M | AM4355SHE23HJ | 2 | 1.9 GHz | 2.4 GHz | 1 MB | HD 7400G | 17 Watt |
| A8-4555M | AM4555SHE44HJ | 4 | 1.6 GHz | 2.4 GHz | 4 MB | HD 7600G | 17 Watt |
Comparing these details with information, that we know about embedded R-Series APUs, reveals that AMD A4-4355M is identical to R-252F. New A8 processor looks very similar to R-452L, and we suspect that the 4555M may also have 19 Watt TDP. Launch dates of new CPUs are not known.
May 16, 2012: AMD debuts second-generation mobile APUs
Jan 14, 2012: AMD Trinity to be available mid-2012
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The a4-4355m should be 2 MB L2 Chache
Killer Chip
This is such an awesome chip. The 7600G can play modern HD and even Full HD games with little tweaking. Only Intel's high-mainstream or high end integrated chips are capable of the same. Gaming is the Ultrabook's achilles heel, and Trinity hits the spot for low-mainstream and mainstream devices. Hopefully someone will come up with a touchscreen-enabled, full HD 11.6 IPS screen and one of those low-TDP quad-core chips. They might even suit a convertible-type of device...