includes additional information for higher-performance operation of DDR2 SDRAM, including supply voltages and command timing information not included in the JEDEC SPD spec. The EPP information is stored in the same EEPROM, but in bytes 99–127, which are unused by standard DDR2 SPD. The parameters are particularly designed to fit the memory controller on the nForce 5, nForce 6 and nForce 7 chipsets. Nvidia encourages support for EPP in the BIOS for its high-end motherboard chipsets. This is intended to provide "one-click overclocking" to get better performance with minimal effort. Nvidia's name for EPP memory that has been qualified for performance and stability is "SLI-ready memory". The term "SLI-ready-memory" has caused some confusion, as it has nothing to do with SLI video. One can use EPP/SLI memory with a single video card (even a non-Nvidia card), and one can run a multi-card SLI video setup without EPP/SLI memory. An extended version, EPP 2.0, supports DDR3 memory as well. Intel Extreme Memory Profile (XMP) A similar, Intel-developed JEDEC SPD extension was developed for DDR3 SDRAM DIMMs, later used in DDR3 SDRAM as well. XMP uses bytes 176–255, which are unallocated by JEDEC, to encode higher-performance memory timings. Later, AMD developed AMP, an equivalent technology to XMP, for use in its "Radeon Memory" line of memory modules optimized for use in AMD platforms. Furthermore, motherboard developers implemented their own technologies to allow their AMD-based motherboards to read XMP profiles: MSI offers A-XMP, ASUS has DOCP (Direct Over Clock Profile), and Gigabyte has EOCP (Extended Over Clock Profile). The header contains the following data. Most importantly, it contains a "medium timebase" value MTB, as a rational number of nanoseconds (common values are 1/8, 1/12 and 1/16 ns). Many other later timing values are expressed as an integer number of MTB units. Also included in the header is the number of DIMMs per memory channel that the profile is designed to support; including more DIMMs may not work well. All data above are for DDR3 (XMP 1.1); DDR4 specs are not yet available. AMD Extended Profiles for Overclocking (EXPO) AMD's Extended Profiles for Overclocking (EXPO) is a JEDEC SPD extension developed for DDR5 DIMMs to apply a one-click automatic overclocking profile to system memory. AMD EXPO-certified DIMMs include optimised timings that optimise the performance of its Zen 4 processors. Unlike Intel's closed standard XMP, the EXPO standard is open and royalty-free. It can be