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Closer Look at Pentium G850, G840 and G620

Since NetBurst microarchitecture was retired for being unable to meet all the expectations, Pentium branded processors have been positioned as inexpensive solutions with average performance. According to Intel, it is not quite an entry-level solution, but it definitely yields to fully-fledged Core processors quite significantly.

The logic behind Pentium processors design is fairly simple: they take Core i3 CPUs, slightly lower their frequency and disable their most appealing features. As a result, we have a fully operational and pretty fast LGA1155 processor, which, however, doesn’t let you fully enjoy the benefits of Sandy Bridge microarchitecture, for which you will have to consider Core i3 or even pricier models.

In other words, Pentium looks very similar to Core i3 at first glance. At least, both of them have two computational cores, an integrated HD Graphics core inside and have 3 MB of L3 cache memory shared between all cores. However, the list of things missing in Pentium 3 is quite long and includes a lot of things that are considered to be key features of the Sandy bridge microarchitecture:

  • Pentium doesn’t support Hyper-Threading technology that allows each computational core to execute two threads. Therefore, the operating system sees Pentium as a dual-core processor, unlike its elder brothers.
  • Pentium graphics core doesn’t support Quick Sync technology. The owners of LGA1155 systems with these inexpensive processors inside won’t be able to take advantage of the integrated hardware unit that accelerated HD video playback.
  • Pentium doesn’t support new vector and cryptographic instructions – AESNI and AVX.
  • The memory controller in these processors works only with DDR3-1067/1333 SDRAM and doesn’t support higher memory frequency multipliers.
  • The clock multiplier for the CPU frequency is dead locked. Pentium processors do not support Turbo Boost technology and do not overclock. Although this is also typical even of the higher-end Core i3 processors.

LGA1155 Pentium processors family includes three models - G850, G840 and G620 that differ only in their clock speeds – and a fourth G620T model that belongs to the special energy-efficient series. The TDP of regular Pentium processors is 65 W, which is typical of dual-core Sandy Bridge CPUs, while the T-model boasts 35 W TDP.

The formal specifications of the 65 W CPU models discussed in our today’s review are summed up below:

Here are a few CPU-Z screenshots for your reference:

 
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