Doing opposite may result in bad XMP or memory module increased heating.Applicability to the older platforms not guaranteed Greetings In this thread Ill tell how you can overclock your RAM and change its timings.On most memory modules this region is locked, but if its unlocked, there is no problem to flash to higher JEDEC speeds.But modifying first 128 bytes is risky, have write access problems (Haswell and higher) and in worst case recovery process would not be that easy.
Use this region if only you have an official SPD dump from the same memory module lineup. Also, there is a 2nd 128 bytes region where additional info (serial number, manuf date and etc) and profiles (XMP, AMP, Nvidia EPP and etc) are stored. This region is 100 unlocked for write operations on 100 of memory modules. The good thing is, I have not been met a laptop that have problems writing to this region. In this guide we will use XMP profiles to change speeds and timings of our memory. XMP profiles should work on most laptops with Sandy Bridge and higher. At that moment, the tb2bin XMP processing utility is the version 1.2 and do the following. The tool might still have some bugs and have not the best UI (my first powershell experience btw), but feedbacks are super welcome Okay, lets imagine that we have 1x 1333Mhz CL9 stick, 1x 1600Mhz CL11 stick and our CPU max supported speed is 1600Mhz. You should see 0xA0, 0xA2, 0xA4 and 0xA6 devices - its your RAM modules (if you have 4 slots occupied). Open tb2bin utility, go to the SPD dump section and enter the address you want to dump (or addresses separated by space). Enter them without 0x prefix, so it would look like A0 or A0 A2 A4 if using multiple addresses. Place your XMP binary (or SPD binary with XMP region) at the same folder with run.bat. Go to the XMP flashing section, point the file name you want to flash and enter the address you want to be flashed with our XMP (or addresses separated by space). XMP will only work if its the same between all memory DIMMs. Try to reboot you laptop first to see, if it apply XMP automatically (most Sandy Bridge laptops do that). Still, if you cant find XMP settings in the BIOS you have two solutions: flash BIOS mod with advanced menu OR extract IFR values from the BIOS and apply them with NVRAM editing (google for it, there are plenty guides on that right now). If you have some experience in timings adjustments: just read you RAM SPD or any SPD dump and go to the XMP Enhancer. If you are a novice, google for timings and look through built-in SPD browser for XMP enabled DDR3 dumps. Then open these dumps and use XMP Enhancer to adjust the values. There are two things you need to remember: always set memory controller voltage level to 0v and use either 1.35v or 1.5v module voltage levels.
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