Overclocking memory on an nForce 790i board is about as easy as it gets, enter the BIOS, go to advance settings and Unlink memory from the FSB. From there it is a case of entering the frequency you wish to use and letting the board choose the nearest available speed. For example, entering 1900MHz sets the board to 1869MHz.
As both of our review samples allow XMP timings of 7-7-7 we choose to match the timings to this and find the maximum overclock at these settings. First up was the Super Talent sticks which were able to achieve stable operation at 1920MHz with 2.1v, an overclock of 120MHz. The Patriot memory was even more impressive and was stable at 1956Mhz with the same voltage and timings, an increase of 156MHz.
1800mhz 7-7-7-21 2.0v
1920mhz 7-7-7-21 2.1v
1800mhz 8-8-8-20 1.9v
1956mhz 7-7-7-21 2.1v
The table below shows the affect each overclock had on overall performance during video encoding: