The NS70-EL's BIOS features some great overclocking options, however, there are a few missing that might be a turnoff to some users. Firstly, for those of you that may have an engineering sample processor, there is the ability to change the CPU clock ratio (multiplier).
There is also an option that allows you to adjust the CPU/DRAM Clock Ratio, with choices of 1:1, 3:4 and 3:5. With a 3:5 ratio and your FSB at 100MHz, you will get a 166MHz (333MHz DDR) memory frequency. With a 3:4 ratio and your FSB at 100MHz, you will get a 133MHz (266MHz DDR) memory frequency. With a 1:1 ratio and your FSB at 100MHz, you will get a 100MHZ (200MHz DDR) memory frequency. The ability to set the CPU/DRAM ratio allows you to obtain a higher clock speed by lowering the ratio and increasing the FSB.
You are also able to adjust the FSB speed anywhere between 100MHz and 165MHz. The only thing I felt was missing from this array of options was the ability to set the core/DIMM voltage. Using the stock Intel heatsink/fan unit, I was able to run my 2GHz Pentium 4 processor (Willamette) at 2.28GHz (114MHz x 20). The highest my Abit BD7-RAID would reach was 2.26GHz (113x20). If there were voltage adjustments on the NS70-EL, I am sure it would've overclocked higher. However, it still managed to give a 20MHz higher overclock than the BD7-RAID, which is known by many as one of the best Pentium 4 overclocking motherboards.
The board ran totally stable at this speed, and lasted through 12 hours of 3DMark2001 loops without a crash. Overall, considering that there are no voltage adjustments on the NS70-EL, I am very pleased with how well it overclocked.