![]() ![]() ![]() Somehow, it still makes the modules run at DDR3-1333. I accidentally overwrote the "lower" XMP profile, but that doesn't matter to me since the computer doesn't read XMP profiles anyway.īut now that I've got my timings flashed with the XMP profile data, I figured it would run at DDR3-1600 and show as 800 MHz in CPU-Z and 1600 MHz in OSX's System Profiler. CPU-Z identifies my memory as PC3-12800H (800 MHz), which seems to be correct. The app is tested against all betas before final versions are released, so if any incompatiblity is found in the future will be reported here and on the blog, like when El Capitan was released. I did succeed in grabbing the XMP timings and overwrote the standard timings. The app and kext extensions are compatible will all macOS versions released so far (Intel CPUs with Turbo Boost, of course). I found SPDTool ( ) and Thaiphoon Burner ( ), where the former does not work on a MacBook Pro but the latter does. There are a few tools available for the job. MacCPUID is a developer tool used for displaying information collected from the microprocessor via the CPUID instruction. This lead me to the question of whether one could flash the SPD table and make modifications to it. This is something the Apple BIOS/EFI doesn't support.īut people are running MacBook Pros at DDR3-1600! Even with a slightly different version ( ) of this memory module. ![]() It turns out that this particular memory module relies on something called the SPD XMP Extension. Sadly, when I was booted into either OSX Lion or Windows 7 Ultimate (both 64-bit) the memory was still only running at DDR3-1333. I briefly checked that the Intel specifications stated that my CPU should support memory speeds at DDR3-1600, so I ordered a Kingston KHX1600C9S3K2_8GX ( ) ![]() I opted for the CPU upgrade (2.3 GHz), but decided to put in the extra memory myself. more detailed and advanced info, download a third-party system info utility program like CPU-Z. I have an early 2011 17" MacBook Pro (MacBookPro8,3). macOS is Apples operating system for all Mac devices. ![]()
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