Over the years Intel has prided itself on its ability to provide processors that fit into the ultraportable, professional market. We’re talking thin and light designs with obscene levels of performance and battery life for the form factor. It’s so important to Intel, that over the years they’ve produced several design and validation standards relating to how the best ultraportable should be developed, such as low power displays, the best connectivity standards, and approaching all-day battery life.
U-series 9W & 15W processors
Intel typically addresses the ultraportable market with its U-series processors, which all end in a U in the product name. Depending on the exact configuration, these processors started with dual-core parts at 9 W, scaling to higher level at 15 W. Starting with the low power processor at 9 W, Intel classifies this as a U-series processor featuring two performance cores, eight efficiency cores, and 96 execution units of graphics in the silicon. As with the ultra-low power Tiger Lake processors, this uses an Intel design known as ‘BGA Type4’, or ‘UP4’, that combines both the CPU and the chipset on the same package. and is the smallest such processor package that they offer.
At 15 W, we’re in the more traditional U-series that we are familiar with. The package size increases to what Intel calls BGA Type3, or UP3, but you’ll notice that the CPU layout looks identical to the 9 W version. That’s because it is the same – up to two performance cores and eight efficiency cores, then 96 execution units on graphics. This is going to be important: for a market readily served today by the Core i9-1195G7 – an 11th Gen 15 W processor with four large cores – Intel is pivoting to fewer performance cores and more efficiency cores for their 12th Gen chips. It’s also worth noting that the chipset is also on die, but offers more functionality than the 9 W chips.
15W processors
Intel also makes this distinction by putting a 5 as the last digit in every processor. That’s because the 0 parts are the even lower 9 W processors, we’ll cover a bit further down. The Core i7-1255U at 15 W comprises 2 performance cores and 8 efficiency cores, having a turbo up to 4.8 GHz and 96 execution units for graphics running at up to 1.25 GHz.
Mid-range Core i5-1235U at 15 W has the same i7-to-i5 reduction. It still gets 2 performance cores and 8 efficiency cores, but the integrated graphics come down from 96 to 80 execution units.
Now at the low end is where we get interesting. There is a single Core i3-1215U, running in a 2P+4E configuration with 64 execution units, but it’s the Pentium and Celeron that are worth looking at.
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