We’ve received some feedback from users with motherboards based on the Intel P45 chipset who are unable to run 1600MHz stable, even with modules that are rated at that speed.

Testing done in our labs has concluded that users looking for the best overclocking results at 4GB on a P45-based DDR3 motherboard will have best results with the following parts:

TW3X4G1800C8DF
TW3X4G2000C9DF
TW3X4096-1600C7DHX

The following part may top out at a speed short of 1600MHz on a P45-based motherboard:

TW3X4G1600C9DHX

The modules that we found unable to achieve 1600MHz on a P45-based motherboard were able to achieve 1800+ on an Asus P5E3 Premium which uses the X48 chipset.

This issue is isolated to only motherboards using the P45 chipset. Please note, this type of issue is something that’s often able to be remedied with a BIOS update from the motherboard manufacturer.

We’ll continue to update this thread as more information becomes available.