The Core 2 Extreme QX9770 Processor, which we review today, is based on the Yorkfield core of the Penryn family, like the previously examined Core 2 Extreme QX9650. However unlike the latter, the QX9770 can't work (officially, at least) with any of the officially announced chipsets, including the Intel X38 Express, since it requires the 1600 MHz FSB. For this reason we had to test it on a sample of the Gigabyte GA-X48-DQ6 motherboard based on the X48 Express chipset, instead of our usual ASUS P5B Deluxe LGA775 board. Note that according to some preliminary information, the X48 will differ from the X38 only by the 1600 MHz FSB support.

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