Patriot PDC32G1866LLK cannot yet boast XMP specification support. SPD contains simple profiles that should ensure the system will boot with these modules installed without any preceding BIOS Setup configuring.
When we tested the first batch of overclocker DDR3 SDRAM, we saw that despite the same component base memory modules from different manufacturers may have very different practical characteristics. This time was no exception as well. When we overclocked Patriot PDC32G1866LLK it performed completely different from the Cell Shock memory kit.
Namely, DDR3-1866 from Patriot didn’t retain stability at frequencies approaching 1800MHz with aggressive 7-7-7-20 timings, no matter what voltage settings we used. With these timings we managed to squeeze maximum 1724MHz with the voltage set at 2.0V.
However, with more “lenient” timings of 8-8-8-24 that are defaults for Patriot DDR3-1866, this memory kit demonstrated much more impressive results. With the voltage remaining at default 1.9V the modules remained stable at up to 1936MHz frequency and when the increased the voltage to 2.0V, the system remained absolutely stable at record-breaking frequency of 1972MHz. It is an absolute record of our lab so far.
Unfortunately, further voltage increase didn’t push the memory’s overclocking potential any higher, which may be caused by limited efficiency of the modules cooling system.
The complete list of obtained frequencies with different timing settings is given in the table below:
Here I would only like to add that at 1800MHz and 2,0V voltage Patriot PDC32G1866LLK kit remained stable not only with default latency settings, but also with more aggressive ones of 8-7-6-22.
However, this is still lower result than what we have just seen by the DDR3-1800 from Cell Shock. So, looks like the conclusion can be made as follows: while Patriot DDR3-1866 copes great with high working frequencies, aggressive timings are not its trump.