There is no mystery behind Core i3-2100T processor. It is a common dual-core Core i3 CPU supporting Hyper-Threading technology, but no Turbo Boost, which clock frequency has been lowered in order to reduce its heat dissipation and power consumption. However, it hasn’t been lowered too dramatically. Even the regular Core i3 processors are pretty energy-efficient, so in order to fit Core i3-2100T into a 35 W thermal envelope, Intel had reduce its clock frequency by as little as 600 MHz .
I have to say that in this case we could do just fine with even lower frequency reduction. For example, Core i5-2390T processor with the same number of cores and threads works perfectly fine at higher clock frequency without getting beyond the 35 W TDP limits. So, 2.5 GHz clock frequency of our Core i3-2100T is more of a marketing move, which should guarantee a noticeable performance difference between Core i3-2100T and Core i5-2390T. Especially, since both these processors have the same Vcore of 1.092 V.
The graphics core in Core i3-2100T is the same as the graphics core in Core i5-2390T. It is Intel HD Graphics 2000 with six execution units and 650 MHz frequency that may reach 1.1 GHz during automatic overclocking.
If we go deeper into details distinguishing Core i32100T and Core i5-2390T, we will see that the junior processor doesn’t support AES instructions. However, this is a distinguishing feature of all Core i3 processors that has nothing to do with energy-efficiency.
The last processor of the four energy-efficient products discussed today is a Pentium product. Pentium G620T is an entry-level dual-core CPU that doesn’t support Hyper-Threading and Turbo Boost. It differs from the regular Pentium G620 by 400 MHz lower clock speed and TDP lowered from 65 W to 35 W.
As we saw in the previous tests even standard Pentium processors do not differ that much from Core i3-2100T. So, an introduction of a 35 W model in this family is not really a big break-through. However, the core voltage of the energy-efficient entry-level processor was lowered to 1.056 V, which is about 0.05 V lower than the Vcore of the regular Pentium processors.
Pentium G620T CPU uses Intel HD Graphics core inside. Unlike the graphics cores in second-generation Core processors, this one doesn’t support Quick Sync, which is typical of any Pentium CPU. The distinguishing feature of the energy-efficient processor model is the working frequencies of its GPU. Its nominal speed is 650 MHz instead of 850 MHz. However, the maximum frequency during overclocking reaches 1.1 GHz, which is exactly the same as by 65 W Pentium processors.
Just like the rest of the Pentium CPUs, the energy-efficient model doesn’t support AES and AVX instructions. Also, the official specifications do not mention DDR3-1333 SDRAM support, so you have to use I with slower memory.