Trying to get a QX6850 to work, at full speed, on a 680i motherboard proved a challenge for many, including AnandTech.  Using an EVGA 680i board and the brand new P30 BIOS, as well as the new ASUS Blitz and P5K Deluxe, they tested the overclocking ability for the CPU and RAM.  One of the key points in the article is that this new BIOS makes it very easy to push a 1066 processor to 1333, but they have much more than that to report on.
“We wanted to bring you a full roundup and comparison against the best that Intel has to offer but most of our BIOS releases are still in beta testing so that will have to wait. We have discovered very few problems at this time, which is a testament to the maturity of these platforms. While our test subjects are still busily running the new benchmark suite, we thought it would be a perfect time to provide an early look at the performance of the 680i chipset and the QX6850 before our efforts switch to the budget sector. We chose the QX6850 as the majority of overclocking issues with the 680i boards have centered on quad core processors in the past, although these issues appear to be solved to a certain degree. ”

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