Starting Up For The First Time
For our tests, we used the Asus P4C800-E mainboard, which supports memory to FSB ratios of 1:1 as well as 3:4. This allows the Pentium M to operate either with DDR 200 or DDR 266 memory. FSB533 supports memory frequencies of DDR266 and DDR333. Unlike the mobile platform based on the 855 chipset, both the i865 and i875 chipsets also support dual-channel DDR.
The first start-up after the upgrade revealed a drawback of the CT-479: several of the overclocking options are deactivated in the BIOS. While the FSB can still be increased - this is the basis for overclocking - the CPU's core voltage is fixed. The multiplier is also off-limits to the user. Finally, support for SpeedStep is also not available. Even the current version of the popular "Centrino Hardware Control" tool (22.214.171.124) was unable to access our Pentium M CPU on the Windows XP platform.
The memory is operating at 166 MHz (DDR333) but CPU-Z mistakenly identifies the ratio as 3:4.
Success: 2.5 GHz On The First Try!
Our Pentium M 770 was rock stable at 2.48 GHz.
We overclocked the Pentium M 770 to 2.56 GHz by increasing the frequency of the front side bus to 160 MHz, without even having to raise the core voltage.