Power Consumption and temperatures

Power Consumption and temperatures

The new Lynnfield based processors have gotten a bit of a redesign and as such they are very energy friendly processors, well --  as long as you do not overclock them.

A processor like the Core i7 870 for example has roughly sometimes even more performance than a core i7 920 yet consumes only 95 Watt, and that is with all cores stressed. Next to that, clever power management allows the internal voltages and processors multiplier to drop, core independent.

All Lynnfield processors have a TDP of 95W, coming from 130 for the Bloomfield Core i7 series that's quite an improvement and it shows this during our measurements:

idle

100% CPU load

92

178

171

115

124

162

86

As you can see, these are very respectable numbers. Mind you that this was done with a P55 motherboard, an SSD, optical drive, 4GB memory and a GeForce GXT 280 graphics card.

For the best power consumption make sure you have BIOS features like EIST and CE1 enabled and within Windows set your performance mode to balanced (allows the processor to clock down).

Power consumption at peak level is a little higher than other P55 motherboards we tested, but as our tests will show .. it's also faster.

Temperatures are very good as well. With an air cooler you can expect temps like these:

idle

100% CPU load

34~38

61~65

This test was conducted with a Thermalright MUX 120 air based cooler. Of course results will vary with different mother boards and cooling solutions. But as a baseline the temperatures definitely are promising, especially with overclocking in mind.

100% CPU load is 4 cores 100% stressed with Prime 95, voltages are left at default, processor Turbo mode is enabled. Overclocked temps of course will differ, but we'll show you that in a split-second.