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AMD processors for the C32 platform and Intel processors for the LGA 1155 platform (e.g. Intel Z68) use dual-channel DDR3 memory instead. The architecture can be used only when all four memory modules (or a multiple of four) are identical in capacity and speed, and are placed in quad-channel slots. When two memory modules are installed, the ...
Quad-channel computer memory is a memory bus technology used by AMD Socket G34 released in May 2010, with Opteron 6100-series "Magny-Cours" (45 nm) [1] and later by the Intel X79 chipset released in November 2011, for LGA2011-based Core i7 CPUs utilizing the Sandy Bridge microarchitecture.
Compared to DDR2 memory, DDR3 memory uses less power. Some manufacturers further propose using "dual-gate" transistors to reduce leakage of current. [10]According to JEDEC, [11]: 111 1.575 volts should be considered the absolute maximum when memory stability is the foremost consideration, such as in servers or other mission-critical devices.
Modern DIMMs can for example feature one rank (single rank), two ranks (dual rank), four ranks (quad rank), or eight ranks (octal rank). [citation needed] There is only a little difference between a dual rank UDIMM and two single-rank UDIMMs in the same memory channel, other than that the DRAMs reside on different PCBs.
The 8n prefetch architecture is combined with an interface designed to transfer two data words per clock cycle at the I/O pins. A single read or write operation for the DDR4 SDRAM consists of a single 8 n -bit-wide 4-clock data transfer at the internal DRAM core and 8 corresponding n -bit-wide half-clock-cycle data transfers at the I/O pins.
DDR SDRAM employs prefetch architecture to allow quick and easy access to multiple data words located on a common physical row in the memory. The prefetch architecture takes advantage of the specific characteristics of memory accesses to DRAM. Typical DRAM memory operations involve three phases: bitline precharge, row access, column access. Row ...
Quad-channel DDR3. up to two DIMMs per channel Quad-channel DDR4. up to two DIMMs per channel Quad-channel DDR3. up to three DIMMs per channel Quad-channel DDR4. up to three DIMMs per channel Overclocking Yes No Embedded GPU No RAID 0/1/5/10 Yes [19] Maximum USB ports (USB 3.0) 14 (0) [20] 14 (6) 14 (0) [19] 14 (6) Maximum SATA ports (SATA 3.0 ...
This designates the technology, and classification of the modules, for instance whether it is DDR2, or DDR3, and whether it is suitable for desktops, or for servers. Keying was designed to make it difficult to install incorrect modules in a system (but there are more requirements than are embodied in keys).