Specifications:
- DDR3 PC3-10600
- CL=9
- Unbuffered
- NON-ECC
- DDR3-1333MHz
- 1.5V
- 512Meg x 64
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). 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.
- Return for refund within: 30 days
- Return for replacement within: lifetime
For a return for credit, this item must be returned to Memory America within 30 days of the invoice date for this policy to apply. For a replacement, we offer a Lifetime warranty and support on all memory upgrades. “Return” constitutes receipt of the product by Memory America, and not the mere issuance of an RMA.
The following conditions are not acceptable for return, and will result in the merchandise you have returned to Memory America being returned to you:
- Modules exhibiting physical damage
- Modules that are missing the manufacturer label containing model number, part number or serial number
- Modules that are missing the manufacturer warranty label
DDR3 SDRAM
In electronic engineering, DDR3 SDRAM or double-data-rate three synchronous dynamic random access memory is a random access memory interface technology used for high bandwidth storage of the working data of a computer or other digital electronic devices. DDR3 is part of the SDRAM family of technologies and is one of the many DRAM (dynamic random access memory) implementations.
DDR3 SDRAM is an improvement over its predecessor, DDR2 SDRAM, and the two are not compatible. The primary benefit of DDR3 is the ability to transfer at twice the data rate of DDR2 (I/O at 8× the data rate of the memory cells it contains), thus enabling higher bus rates and higher peak rates than earlier memory technologies. In addition, the DDR3 standard allows for chip capacities of 512 megabits to 8 gigabits, effectively enabling a maximum memory module size of 16 gigabytes.
With data being transferred 64 bits at a time per memory module, DDR3 SDRAM gives a transfer rate of (memory clock rate) × 4 (for bus clock multiplier) × 2 (for data rate) × 64 (number of bits transferred) / 8 (number of bits/byte). Thus with a memory clock frequency of 100 MHz, DDR3 SDRAM gives a maximum transfer rate of 6400 MB/s.
It should be emphasized that DDR3 is a DRAM interface specification; the actual DRAM arrays that store the data are the same as in any other type of DRAM, and have similar performance.
Backward compatibility
DDR3 DIMMs are not designed to be backward compatible with DDR2 DIMMs. The notch on DDR3 DIMMs is in a different position from DDR2 DIMMs, and the pin density is higher than DDR2 DIMMs in desktops. Notebooks have 204-pin modules for DDR3 and 200-pin modules for DDR2, also the notch on DDR3 modules is in a slightly different position than that on DDR2 modules.
Higher performance DDR3 DIMMs are compatible with lower performance DDR3 DIMMs; however, the higher performance module runs at the lower module's frequency. Using lower performing DDR3 memory in a system capable of higher performance results in the bus running at the rate of the lowest performance memory in use; however, in many systems this performance hit can be mitigated by setting the timings of the memory to a lower latency setting.
> 
