https://hothardware.com/reviews/intel-core-2-extreme-qx6850?page=8
Intel Core 2 Extreme QX6850 - Page 8 | HotHardware
Jul 16, 2007 - Intel's new Core 2 Extreme QX6850 offered performance gains on the order of about 2 to sometimes as much as 13%, depending on the application. - Page 8
intel core 2 extremepage 8qx6850