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Published July 16, 2007
The new Core 2 Extreme QX6850 processor does well in the SiSoft XI memory bandwidth performance test. However this is not because of the speedy four cores, but rather because it uses a quad-pumped 333MHz FSB whereas the other Core 2 processors all use the 266MHz FSB. This allowed the QX6850 to produce around 13% more memory bandwidth than the QX6700.
While the faster FSB of the Core 2 Extreme QX6850 processor did not appear to have much impact on the PCmark2005 write block test, it had a significant impact on the rear performance. Here the new QX6850 was found to be 32% faster than the QX6700.
The MemTach Analyze tests appear to be dictated by core clock frequency rather than FSB speeds or L2 cache capacity. Therefore the Core 2 Extreme QX6850 was only slightly faster than the dual-core Extreme X6800 processor which is clocked just 70MHz slower.
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