Pentium Dual-Core E5200
Pentium DC E5200 is a much more interesting processor. The thing is that it represents a completely new processor generation, there haven’t been any CPUs like that in the market before. All previous processors sold as Pentium Dual-Core were based on 65nm Conroe cores with severely limited functionality. The new model in this line-up has not only a significantly higher processor model number, but also uses a 45nm core from Wolfdale family. However, Pentium DC is still positioned as an intermediate solution between high-performance Core 2 Duo and low-cost Celeron processors. Therefore E5200 functionality is seriously limited compared with any contemporary Core 2 Duo from E7000 as well as E8000 series. Pentium DC E5200, as well as all other models in this family that will come out later, features smaller 2MB L2 cache and supports 800MHz system bus.
It should be noted that Pentium DC E5200 is significantly more advanced than the previous processors sold under the same brand name. Its predecessors from E2000 series not only work at lower clock speeds, but also feature cache-memory of half the size. Moreover, 45nm Wolfdale core used in Pentium DC E5200 CPU has a number of microarchitectural enhancements. As you already know, it supports SSE4.1 instructions, features Fast Radix-16 Divider unit accelerating the division and square root calculations, features Super Shuffle Engine mechanism speeding up processing of those SSE instructions that require shuffling. It also works with memory using optimized algorithms.
The complete list of formal Pentium Dual-Core E5200 specifications is summed up in the table below:
Pentium Dual-Core E5200
Enhanced Intel Speedstep
Intel Virtualization Technology
SIMD instructions support
MMX, SSE, SSE2, SSE3
Note that Wolfdale-2M core with three times smaller L2 cache memory is a pretty exotic solution for Pentium DC E5200 processor. Nevertheless, it is not the only CPU that is built on a core like that. Its close relative is a recently released quad-core Core 2 Quad Q8200 processor that uses two Wolfdale-2M cores within single packaging.
You can get additional info on Pentium DC E5200 from the report by CPU-Z utility:
I would like to draw your attention to the fact that it is based on M0 processor stepping, the same as by Core 2 Duo E7000 series processors. It means that Pentium DC E5200 is based on the same semiconductor die as Core 2 Duo E7000 from the next processor family in the hierarchy. In other words, Intel decided not to design any new cores with 2MB L2 cache, but uses cores with a 3MB L2 cache, one third of which is disabled. It is a pretty logical approach, considering that Wolfdale-2M is not that widely spread and there are very few processors using it.
Besides, there is one more peculiarity that draws our attention: Pentium Dual Core E5200 doesn’t support SSE4.1 instructions. It is not a mistake in the CPU-Z report. Although this processor formally belongs to Wolfdale family, it doesn’t support these instructions. Intel simply disabled the corresponding feature in its low-cost dual-core CPUs.