8-Core Memory

Eight-core computers have eight memory slots, four per processor. You can install 1 GB, 2 GB, or 4 GB DIMMs for a total of up to 32 GB of memory.

Each processor’s memory controller has three memory channels. DIMM slots 1, 2, 5, and 6 have their own channels; slots 3 and 4 share a channel and slots 7 and 8 share a channel.

For optimal memory bandwidth, all six memory channels should be used, and memory should be balanced across the six channels.

Note: Populating slot 4 or 8 slightly drops maximum memory bandwidth, but depending on the applications used, overall system performance may benefit from the larger amount of memory.

Memory Slot Utility

If you have

Fill in these slots

Two DIMMs

1 and 2

Three DIMMs

1, 2, and 3

Four DIMMs

1, 2, and 5, 6

Six DIMMs

1, 2, 3 and 5, 6, 7

Eight DIMMs

1, 2, 3, 4 and 5, 6, 7, 8

If you install different-size DIMMs in your computer, follow the order in the tables above. If the DIMM configuration you install doesn’t provide optimized performance, the Memory Slot Utility will appear on screen and recommend an improved configuration. To use the Memory Slot Utility again, go to /System/Library/Core Services.

© 2009 Apple Inc. All rights reserved.

073-1246 Rev. B   4

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Apple Memory DIMMs warranty Core Memory, Memory Slot Utility, If you have Fill in these slots
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Memory DIMMs specifications

Apple Memory DIMMs, or Dual In-line Memory Modules, are crucial components that enhance the performance of Apple devices, including MacBooks, Mac desktops, and servers. These memory modules are designed to work seamlessly with Apple's ecosystem, providing efficient and high-performance memory solutions tailored to the needs of professional users and creative professionals.

One of the standout features of Apple Memory DIMMs is their optimized compatibility with macOS. Apple's memory modules are engineered to leverage the full potential of integrated graphics and powerful processors, ensuring that applications run smoothly and efficiently. With memory technologies like DDR4 and DDR5, Apple DIMMs provide significant bandwidth improvements, resulting in faster data transfer rates, reduced latency, and enhanced overall system performance.

Apple's DIMMs are available in various capacities, ranging from 8GB to 128GB per module, allowing users to customize their machines according to their workload requirements. The scalability offered by these memory modules is particularly beneficial for users engaged in intensive tasks such as video editing, 3D rendering, and software development. Additionally, Apple Memory DIMMs feature ECC (Error-Correcting Code) technology, which enhances data integrity by detecting and correcting common data corruption issues. This is particularly important for professional users who depend on absolute reliability in their workflows.

The design of Apple Memory DIMMs showcases a commitment to thermal efficiency. With advanced heat spreaders, these memory modules maintain optimal operating temperatures, thus ensuring consistent performance during demanding tasks. Furthermore, their compact form factor allows for easy installation and upgrading, making it simple for users to enhance their system’s memory capacity as needed.

Integration with Apple Silicon further elevates the performance of Memory DIMMs. The unified memory architecture employed in Apple’s M1 and M2 chips allows for shared memory between the CPU and GPU, which leads to significant performance gains and improved energy efficiency. This architecture eliminates the bottlenecks typically seen in traditional systems, allowing faster access to memory and streamlined operations for resource-intensive applications.

In summary, Apple Memory DIMMs are sophisticated memory solutions that combine high performance, reliability, and advanced technology. With the ability to support a wide range of workloads and a clear focus on integration with Apple's hardware, these modules are an essential aspect of the tailored computing experience that Apple users have come to expect. Whether for casual use or professional applications, Apple Memory DIMMs ensure that devices operate at their best, providing the speed and efficiency needed to tackle today's demanding tasks.
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