IGP 32nm Arrandale processor can be disabled

Last week we wrote about Intel's 32 nm Westmere processors. One of these CPUs, the currently codenamed Arrandale chip, is constructed for the mobile segment and will feature an integrated graphics chip (IGP). Contrary to the two Arrandale processor cores, that are both 32 nm chips, the IGP will be produced at 45 nm.  Using te MCM (Multi-Chip-Module) principle, the two seperate chips can be placed under the same roof.

Arrandale will consist of two 32 nm processor cores and a 45nm IGP

Fudzilla reports that Arrandale's IGP chip can be disabled in favor of a second, more powerful graphics chip. Both AMD and nVidia already support a similar functionality on the form of respectively Switchable Graphics/Hybrid CrossfireX and Hybrid Graphics. The only difference with Arrandale compared to the current situation would be that Intel's chip is integrated into the processor itself, rather than on the motherboard's chipset. The enabling and disabling of the Intel IGP makes it possible to use this chip for lighter tasks, while a more powerful one takes over when performance is required. This should account for a balance between power consumption and performance.

Switchable Graphics makes it possible two switch between an IGP and a second GPU

It's expected that the Arrandale processors will be used in the mobile segment. The 'regular' models will feature a 35 Watt TDP, while the more efficient Low Voltage and -possibly- Ultra Low Voltage models will consume 10 to 30 Watt. Though the Arrandale CPU+IGP combination will consume more than the current generation of 45nm dualcore Penrym-3M processors (Core 2 Duo SU9x00 series), the total power consumption of the system will be lower because of the IGP. Because of this, it is possible Intel will use a modified version of the TDP-specification with the introduction of it's Arrandale processor.

Tags: crossfire tegra 32nm 45nm core2

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