Intel introduces ultra-low voltage mobile CPUs

Earlier this week we published a story about Intel "Sandy Bridge" mobile microprocessors, coming later this month. The list of confirmed models included Celeron 847, two embedded Celerons, Pentium B940, two embedded Core i3s, and three ultra-low voltage (ULV) Core i5/i7 SKUs. Today, Intel updated official price list with 4 ULV models: Celeron 847, Core i5-2557M, Core i7-2637M and i7-2677M. It's important to note that the pricelist is not complete, and it doesn't contain prices for embedded microprocessors, mainstream and ULV CPUs from Pentium and Core i3 mobile families, and Core i5-24xxM series. For this reason, we'll have to wait for an official announcement (if there will be one), or for updates to Intel product ARK database to determine additional processors, that were released today.

Celeron 847 is a basic dual-core microprocessor with 2 MB L3 cache and minimum set of features. The CPU is clocked at 1.1 GHz, which is 100 MHz lower than the fastest ULV Celeron U3600 from previous generation of Westemere microprocessors. Intel 847 has the same price as the U3600, $134. So far the Celeron was sighted in Fujitsu LIFEBOOK P701 laptop (PDF file). The P701 is a ultra-thin notebook with 12.1" widescreen display, that comes up to Intel HM65 chipset, 2 GB or 4 GB of DDR3-1333 RAM, 128 GB SSD, 320 GB FDE or up to 160 GB hard disk drive, and optional WLAN, Bluetooth and 3G connectivity. The Fujitsu notebook uses 64-bit Windows 7 Home, Home Premium or Professional operating system, although it's also compatible with Windows Vista and Windows XP. The LIFEBOOK P701 weights 1.56kg or 3.43lb, and may run up to 10 hours on a single charge of 6-cell Li-Ion battery.

Feature-wise, Core i5-2557M, Core i7-2637M and i7-2677M processors are very close to each other: 2 CPU cores with HyperThreading, support for Turbo Boost technology, AVX and AES instructions, BGA package, and ultra-low 17 Watt Thermal Design Power, that includes power dissipated by the cores and HD graphics. The difference between the CPUs are in the stock and turbo frequencies, and in the size of L3 cache. Core i5-2557M and i7-2637M operate at 1.7 GHz, but the Core i7 processor has larger 4 MB level 3 cache. The Core i7-2677M runs at 1.8 GHz, boosted to 2.9 GHz when only one core is operational. Turbo frequencies of the i5-2557M and i7-2637M SKUs are lower - 2.7 GHz and 2.8 GHz respectively. Official prices of these models are $250 for the Core i5 part, $289 for the i7-2637M, and $317 for the Core i7-2677M. It is interesting that noticeably slower versions of these Core i5 and i7 ULV CPUs have the same prices, $250 for the 1.4 GHz Core i5-2537M, $289 for Core i7-2617M with 1.5 GHz clock frequency, and $317 for 1.6 GHz Core i7-2657M.

Specifications of four new processors are provided in the table below:

ModelCoresThreadsFrequencyTurbo FrequencyL3 cacheTDPPrice
Core i5-2557M241.7 GHz2.7 GHz3 MB17 Watt$250
Core i7-2637M241.7 GHz2.8 GHz4 MB17 Watt$289
Core i7-2677M241.8 GHz2.9 GHz4 MB17 Watt$317
Mobile Celeron 847221.1 GHzN/A2 MB17 Watt$134

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