Intel Mobile Pentium B940 is one the first three Pentium-branded mobile microprocessors, built on Sandy Bridge microarchitecture. The B940 was spotted for the first time in specifications of Hewlett Packard 431 and 630 business laptops in April 2011, and it was launched in June 2011 together with Pentium 957 and B950 CPUs. The processor is aimed at value mobile market, and it includes just enough functionality for most types of office applications, and for casual gaming.
Internally, Pentium B940 incorporates two CPU cores, with each core having dedicated 64 KB L1 cache and 256 KB L2 cache, and operating at 2 GHz. As all Sandy Bridge processors, Pentium integrates several components in addition to CPU cores:
- 2 MB L3 cache, shared between the cores. The size of L3 cache is smaller than on Core-branded mobile microprocessors.
- DDR3 memory controller. This controller is used to access system memory.
- Direct Media Interface (DMI). This interface is used for communications between the CPU and peripheral devices. The DMI on the B940 model provides twice as much bandwidth, compared to previous generation of Westmere-based Pentium P6x00 CPUs.
- On-chip graphics controller. This controller is capable of displaying HD content, but it lacks many features, found in Core-branded models, such as 3D acceleration, Quick Sync and Clear Video HD.
Although the Sandy Bridge micro-architecture comes with abundance of technologies and extensions to instruction set, many intermediate and advanced ones are disabled on Intel B940. Specifically, the processor supports 64-bit operating systems and applications, and VT-x virtualization, but doesn't support HyperThreading, Turbo Boost, AES acceleration instructions, and a few other technologies.
Pentium B940 includes the same set of low-power features, as more
expensive Core i3, i5 and i7 CPUs, and has standard for mobile devices
35 Watt Thermal Design Power. The processor is manufactured in
micro-PGA package, compatible with socket G2.
Intel Pentium B940 specifications
|Type||CPU / Microprocessor|
|Family||Intel Pentium Dual-Core Mobile|
|CPU part number|
|Bus speed||5 GT/s DMI|
|Package||988-pin micro-FCPGA10 (rPGA988B)|
|Socket||Socket G2 / rPGA988B|
|Size||1.48" x 1.48" / 3.75cm x 3.75cm|
|Weight||0.2oz / 5.6g|
|Introduction date||June 19, 2011|
|Price at introduction||$134|
|Architecture / Microarchitecture|
|Processor core||Sandy Bridge|
|Core stepping||Q0 (QACA, SR07S)|
|Manufacturing process||0.032 micron High-K metal gate process|
|Data width||64 bit|
|The number of cores||2|
|The number of threads||2|
|Floating Point Unit||Integrated|
|Level 1 cache size||2 x 32 KB instruction caches|
2 x 32 KB data caches
|Level 2 cache size||2 x 256 KB|
|Level 3 cache size||2 MB shared cache|
|Cache latency||4 (L1 cache)|
12 (L2 cache)
27 (L3 cache)
|Physical memory||16 GB|
|Low power features||Enhanced SpeedStep technology|
|Integrated peripherals / components|
|Electrical / Thermal parameters|
|Maximum operating temperature||85°C|
|Thermal Design Power||35 Watt|
|Notes on Intel Pentium B940|