The Quad core A6-3400M APU ( Accelerated Processing Unit) from AMD has a better graphics performance than the Intel Pentium B940. However, its processor performance is not as great, especially in single threaded application ( as conformed with the Super Pi, single threaded version benchmark results). The Pentium B940 belongs to the newer Sandy Bridge processors with turbo boost and Hyperthreading disabled.
In overall A6-3400M should turn out better than the Pentium B940, due to the following reasons.
1. The A6-3400M has turbo boost, using which its clock frequency can rise to 2.3 GHz. This is helpful in real life computing.
2. The A6-3400M has four cores while the Pentium B940 has two cores ( though base clock of A6-3400 is only 1.4 GHz. The base clock of the Pentium B940 is 2.0 GHz),
2. The Radeon HD 6480G integrated graphics in the A6-3400M is much better than the Intel HD Graphics in the Pentium B940.
Table : Feature Differences
|Feature||AMD A6-3400M||Intel Pentium B940|
| Core Frequency
||1.4 Ghz||2.0 GHz|
| No. Of Cores
||4||2 ( No Hyperthreading)|
| Cache Organization
||4 MB L2 cache||2 MB L3|
|Turbo Frequency||2.3 Ghz||No Turbo|
| TDP Rating
| 64 Bit Support
| Integrated Memory Controller
| Integrated Graphics
||Yes, Radeon HD 6480G||Yes, 650 MHz Base, 1.1 GHz Max|
Table : Benchmarking Comparison
|Benchmarks||AMD A6-3400M||Intel Pentium B940|
| Super Pi 2M (Lower in better)
||89 seconds||45.5 seconds|
| 3D Mark 06 CPU
| Windows 7 Experience Score
Some more details of AMD A6-3400M
The AMD A6-3400M is an entry level quad-core processor for notebooks. This is code named as Llano and released on June 15th of 2011. This processor comes under AMD A-Series. The base frequency of the processor is 1.4GHz only. Its Turbo Boost technology can over clock it up to 2.3 GHz, but this over clocking completely depends on temperature conditions and number of cores usage. This processor comes with integrated Radeon HD 6520G Graphics card and integrated memory controller that can support for DDR3 (L)- 1333 memory and a PCle 2.0 controller. The TD of this processor is 35 Watt.
Some more details of Intel Pentium B940
The architecture of the Pentium B940 is based upon Sandy Bridge. Performance wise, it is better than the Arrandale notebook based Pentium processors ( Pentium P6100 and P6200). However, the turbo boost feature is disabled in Pentium B940. Additionally the Hyperthreading is disabled leading to inferior performance as compared to the second generation Intel core i3 processors.