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Intel Core i5 750 & Core i7 860/870 Review
[Abstract]
Lynnfield Makes its Long Awaited DebutMeet Lynnfield, Intel's latest processors that have been on the upcoming horizon for the longest time. The mainstream successor to Intel's Core 2 platform ...
[Content] PCDigitalMobileGame
Power Consumption
The Lynnfield comes with a TDP rating of 95W compared to the 130W for Bloomfield so one can expect a lower power draw overall, whether at idle or at full load. Our results confirmed this, with the Core i5-750 having the lowest at idle. Once we started loading the processors, the Lynnfield reached the power draw levels of the Core 2 quad-cores and at full load, they were slightly more power hungry than the Core 2 processors. This put them comfortably lower than both the Bloomfield Core i7 and the high-end Phenom II X4 models.
Overclocking
Next, we tried our hand at overclocking by pushing the base clock from its 133MHz default, as we could not push the multiplier beyond its default (our Lynnfield processors were locked), though one can try lowering the multiplier if the base clock has not reached its overclock limit. Not surprisingly, our best attempt came with the Core i5-750, which allowed us to hit a base clock of 170MHz on the Intel reference board.
It was followed by the Core i7-860 who hit the overclocking barrier at 160MHz. Meanwhile, our luck with the Core i7-870 came to an abrupt end at 150MHz, only a slight bump in terms of the base clock. However, once you factor in the 22x multiplier for the i7-870, it's 3.30GHz, not taking in account Turbo Boost yet. For the i7-860, that translated to 3.36GHz while for the i5-750, it was 3.4GHz, which meant that all three had similar limits.
No doubt, once Turbo Boost comes into play, you're likely to find these processors running at even higher clocks automatically with 4GHz almost a certainty especially for single threaded applications.
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