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A dual inline memory module (DIMM) consists of a number of memory components (usually black) that are attached to a printed circuit board (usually green). The gold pins on the bottom of the DIMM provide a connection between the module and a socket on a larger printed circuit board. The pins on the front and back of a DIMM are not connected to each other.

184-pin DIMMs are used to provide DDR SDRAM memory for desktop computers. Standard 184-pin DIMMs are available in PC1600 DDR SDRAM, PC2100 DDR SDRAM, PC2700 DDR SDRAM, and PC3200 DDR SDRAM.

To use DDR memory, your system motherboard must have 184-pin DIMM slots and a DDR-enabled chipset. A DDR SDRAM DIMM will not fit into a standard SDRAM DIMM socket. (Information about which memory technology your system uses is included in the Crucial Memory Advisor™ tool.)

The number of black components on a 184-pin DIMM can vary, but it always has 92 pins on the front and 92 pins on the back, for a total of 184. 184-pin DIMMs are approximately 5.25 inches long and 1.25 inches high, though the heights can vary. While 184-pin DIMMs and 168-pin DIMMs are approximately the same size, 184-pin DIMMs have only one notch within the row of pins.

Crucial® DDR4 Desktop Memory
More speed. More bandwidth. More efficient. The future of memory is here.
In the ever-changing world of technology, any component more than half a decade old is usually in need of an update. At seven years old and counting, that’s exactly the state DDR3 memory is in: computers can only do so much with it.

Since the introduction of DDR3 memory technology in 2007, processors have doubled in capability, SSDs have revolutionized throughput, and graphics cards have drastically increased frame rates, leaving memory as a limiting factor. With Crucial DDR4 Desktop Memory, crush the DDR3 memory bottleneck and unlock a new standard of performance.

2x the Speed
Load applications faster and run demanding programs without lag. Crucial DDR4 memory debuts at 2133 MT/s – more than 30% faster than DDR3 memory technology. Even better, as DDR4 technology matures, speeds are projected to hit 3200 MT/s – twice what was possible on standard DDR3 memory.

2x the Bandwidth
Effortlessly multitask between apps, and empower your system to fire on all cylinders. Crucial DDR4 increases memory bandwidth by over 30%, allowing your system to handle more data at once. As DDR4 technology matures, bandwidths are expected to achieve up to 25.6 GB/s – twice that of standard DDR3. To maximize bandwidth, Crucial DDR4 memory is optimized for next-gen platforms that support four channel memory.

40% More Energy Efficient
Get better performance – using less power. Operating at just 1.2V compared to 1.5V for standard DDR3 memory, Crucial DDR4 consumes 20% less voltage than standard DDR3 technology. Crucial DDR4 modules also contain other efficiency features, for an overall power reduction of up to 40%.

Take the guesswork out of upgrading your Mac with Crucial memory for Mac systems. Since Apple® computers often have very specific memory requirements, including particular component densities, speeds, and SPD programming specifications, it's important to use memory that's engineered for your Mac. With more than a decade of experience manufacturing and developing memory for all types of Apple computers, trust Crucial memory to optimize your Mac system's performance.

Reliability for Mac systems
When you use your Mac system, you expect intuitive, dependable performance. And if you're a Mac Pro® user, you expect mission-critical workstation reliability. Expect the same out of your memory. Every module that leaves our doors has been extensively tested at the component level for voltage and temperature resistances, signal integrity, and software compatibility. Even better, modules are lead- and halogen-free.1

Speed and energy efficiency for Mac systems
A memory upgrade is the fastest, easiest, and most affordable way to get more performance out of your Mac system. Standard DDR3 modules help Mac systems reach speeds up to 1600 MT/s. For newer Mac systems, DDR3L modules are available. These modules deliver speeds starting at 1866 MT/s and use 10% less power for improved energy efficiency.

Support for Mac systems
Unsure how to install memory or have an important question about your Mac system? Let our team of experts help! Our team knows Apple systems and requirements inside and out, and we'll provide the technical support you need – no matter which Mac system you're using. From phone support, videos, FAQ articles, and do-it-yourself install guides for more than 70 different Mac systems, we've got the resources you need to keep your system up to speed.

Micron quality — a higher level of reliability.
As a brand of Micron, one of the largest memory manufacturers in the world, Crucial memory for Mac systems is backed by the same quality and innovation that has produced some of the world's most advanced memory and storage technologies. With a product portfolio that includes upgrades for more than 100,000 systems, we've got one specifically designed for your Mac system.

*Note that per Apple manufacturer specifications, memory can't be upgraded on (a) many Mac systems made after mid-2012 and (b) retina-based models. Before upgrading your memory, consult your owner's manual to verify that an upgrade is possible.

Improve Performance
Boot up faster. Load files quicker. Improve overall system responsiveness for all your computing needs.

Tools for Easy Installation
Our simple instructions, cloning software, and how-to videos make installation straightforward! Millions of people have upgraded with a Crucial SSD.

Award-Winning Support
Get questions answered by our expert support team. Read SSD articles or chat live with one of our specialists.

Essential performance
The easiest way to get all the speed of a new computer without the price.
Ever wonder why your phone responds faster than your computer? It’s because your phone runs on flash memory. Add flash to your laptop or desktop computer with the Crucial BX500 SSD, the easiest way to get all the speed of a new computer without the price. Accelerate everything.

Micron quality — a higher level of reliability
With thousands of hours of Micron pre-release validation, dozens of SSD qualification tests, and a heritage of award- winning SSDs, the Crucial BX500 has been thoroughly tried, tested, and proven.

• The Crucial® BX500 SSD – Performance at Value

Improve Performance
Boot up faster. Load files quicker. Improve overall system responsiveness for all your computing needs.
 

Push performance to the next level with the blazing speed and massive bandwidth of Crucial® DDR5 Pro Memory: Overclocking Edition. Mobilize the power of low latency to beat the clock and fuel your next win instead of worrying about performance bottlenecks. Our powerful overclocking DDR5 Pro memory supports next-gen multi-core CPUs and features Intel® XMP 3.0 and AMD EXPO™ support1 on every module.

Cool look and feel
Our overclocking DDR5 Pro memory features an aluminum heat spreader with a unique, origami-based design that is both cool to the touch and an aesthetic win for any rig.

Accelerated performance
for more wins
Since every millisecond gained in fast-paced gameplay means the difference between winning and losing, seize the advantage with 25% lower latency4 for higher frame rates per second.

Flexibility is our flex
By supporting both Intel XMP 3.0 and AMD EXPO1 on the same module, Crucial offers you ultimate flexibility with your build and a tactical advantage. Keep your options open by starting with Crucial DDR5 Pro for overclocking.

Push performance to the next level with the blazing speed and massive bandwidth of Crucial® DDR5 Pro Memory: Overclocking Edition. Mobilize the power of low latency to beat the clock and fuel your next win instead of worrying about performance bottlenecks. Our powerful overclocking DDR5 Pro memory supports next-gen multi-core CPUs and features Intel® XMP 3.0 and AMD EXPO™ support1 on every module.

Cool look and feel
Our overclocking DDR5 Pro memory features an aluminum heat spreader with a unique, origami-based design that is both cool to the touch and an aesthetic win for any rig.

Accelerated performance
for more wins
Since every millisecond gained in fast-paced gameplay means the difference between winning and losing, seize the advantage with 25% lower latency4 for higher frame rates per second.

Flexibility is our flex
By supporting both Intel XMP 3.0 and AMD EXPO1 on the same module, Crucial offers you ultimate flexibility with your build and a tactical advantage. Keep your options open by starting with Crucial DDR5 Pro for overclocking.

Hold on tight — the Crucial® T705 Gen5 NVMe® SSD is taking Gen5 performance to the next level. Fuel your gaming, create at the speed of ideas, and power through AI applications with ease with this fully optimized Gen5 masterpiece that works with your motherboard heatsink.

Crucial 240-pin DIMMs are used in DDR3 memory for desktop computers. DDR3 is the latest generation of memory with an improved architecture that allows it to transmit data more quickly.

A dual inline memory module (DIMM) consists of a number of memory components (usually black) that are attached to a printed circuit board (usually green). The gold pins on the bottom of the DIMM provide a connection between the module and a socket on a larger printed circuit board. The pins on the front and back of a DIMM are not connected to each other.

Each 240-pin DIMM provides a 64-bit data path (72-bit for ECC or registered or Fully Buffered modules). (The Ballistix™ and Ballistix Tracer™ high-performance memory do not come in 72-bit or registered modules.) Standard DDR3 240-pin DIMMs are currently available in DDR3 PC3-8500 SDRAM. Additional speeds will be added as the technology becomes available.

To use DDR3 memory, your system motherboard must have 240-pin DIMM slots and a DDR3-enabled chipset. This is because a DDR3 SDRAM DIMM will not fit into a standard DDR2 DIMM socket or a DDR DIMM socket.

The number of black components on a 240-pin DIMM can vary, but it always has 120 pins on the front and 120 pins on the back, for a total of 240. 240-pin DIMMs are approximately 5.25 inches long and 1.18 inches high, though the heights can vary. While 240-pin DDR3 DIMMS, 240-pin DDR2 DIMMs, 184-pin DDR DIMMs, and 168-pin DIMMs are approximately the same size, 240-pin DIMMs and 184-pin DIMMs have only one notch within the row of pins.