How to Overclock Core i7 920 Processors
Core i7-920 are effectively “locked" – certain components of the processor that can be adjusted in the Core i7-965 are out of bounds on the 920. This doesn’t mean overclocking isn’t possible, however – in fact if you’re a beginner this is a great CPU to start on.
Booting your Intel Core i7 powered PC straight into the BIOS will reveal no mention of a Front Side Bus (FSB) – the architecture that has linked the CPU to the memory controller since the first PCs were made has now been discarded, with the CPU now hosting the integrated memory controller.
Replacing the FSB is the Base Clock (also known as the Host Clock) – as with the old FSB, this is the main reference point for overclocking, and will require adjusting in order to increase it over 133 MHz.
Joining the Base Clock on the CPU are the usual suspects such as the cache – all none core components of the CPU are referred to as the “uncore" and this has an effect on how you overclock, depending on your Intel Core i7 CPU.
If your processor is the Extreme Edition, you can overclock the core and uncore at separate rates as it is unlikely you will need the uncore to be functioning as fast as the main core. Non-Extreme Edition Core i7 CPUs however cannot be set to different rates in this way.