Memory kits are sold in matched kits that are designed to run together as a set. Mixing memory kits will result in stability issues or system failure. Memory kits that are 'Intel XMP 3.0 Ready' / 'Amd Expo Profile Ready' includes support for the respective OC profile. Prior to enabling XMP or Expo, memory kits will boot at default Bios settings with compatible hardware. For memory kits with XMP or Expo, enable Xmp/Expo/Docp/Axmp profile in Bios to reach the rated potential XMP or Expo overclock speed of the memory kit, subject to the use of compatible hardware. Please refer to the 'How to Enable Xmp/Expo' guide. Reaching the rated Xmp/Expo overclock speed and system stability will depend on the compatibility and capability of the motherboard and CPU used. Usage in any manner inconsistent with manufacturer specifications, warnings, designs, or recommendations will result in lower speeds, system instability, or damage to the system or its components. Memory module height can be found in the Faq, under the question 'How tall are the memory modules?'. For product support and related questions, please contact the G.skill technical support team via email. Return postage is paid by the customer. The product has been modified using unauthorised methods. The item has been serviced by another party other than madelectronics Consequential loss including but not limited to data, programs, software or other information stored on storage products, computer or laptop systems. Software Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.