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Other memory technologies – namely HBM in version 3 and 4 [58] – aiming to replace DDR4 have also been proposed. In 2011, JEDEC introduced the Wide I/O 2 standard, which features stacked memory dies placed directly on top of the CPU within the same package. This configuration provides higher bandwidth and improved power efficiency compared ...
Without knowing the clock frequency it is impossible to state if one set of timings is "faster" than another. For example, DDR3-2000 memory has a 1000 MHz clock frequency, which yields a 1 ns clock cycle. With this 1 ns clock, a CAS latency of 7 gives an absolute CAS latency of 7 ns. Faster DDR3-2666 memory (with a 1333 MHz clock, or 0.75 ns ...
Corsair expanded its DRAM memory module production into the high end market for overclocking. [8] This expansion allows for high power platforms and the ability to get more performance out of the CPU and RAM. The Corsair Vengeance Pro series and Corsair Dominator Platinum series are built for overclocking applications. [9] [10] [11]
In computing, serial presence detect (SPD) is a standardized way to automatically access information about a memory module.Earlier 72-pin SIMMs included five pins that provided five bits of parallel presence detect (PPD) data, but the 168-pin DIMM standard changed to a serial presence detect to encode more information.
[11] [12] "2 Gb" GDDR5 memory chips will enable graphics cards with 2 GB or more of onboard memory with 224 GB/s or higher peak bandwidth. On June 25, 2008, AMD became the first company to ship products using GDDR5 memory with its Radeon HD 4870 video card series, incorporating Qimonda's 512 Mb memory modules at 3.6 Gbit/s bandwidth. [13] [14]
Because the CAS latency is specified in clock cycles, and not transfers (which occur on both the rising and falling edges of the clock), it is important to ensure it is the clock rate (half of the transfer rate) which is being used to compute CAS latency times. [citation needed] Another complicating factor is the use of burst transfers.
Address and control signals are still sent to the DRAM once per clock cycle (to be precise, on the rising edge of the clock), and timing parameters such as CAS latency are specified in clock cycles. Some less common DRAM interfaces, notably LPDDR2 , GDDR5 and XDR DRAM , send commands and addresses using double data rate.
Dual-channel memory slots, color-coded orange and yellow for this particular motherboard. Dual-channel-enabled memory controllers in a PC system architecture use two 64-bit data channels. Dual-channel should not be confused with double data rate (DDR), in which data exchange happens twice per DRAM clock. The two technologies are independent of ...