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DDR3 advances extended the ability to preserve internal clock rates while providing higher effective transfer rates by again doubling the prefetch depth. The DDR4 SDRAM is a high-speed dynamic random-access memory internally configured as 16 banks, 4 bank groups with 4 banks for each bank group for ×4/×8 and 8 banks, 2 bank groups with 4 ...
DDR3-2000 memory with 9-9-9-28 latency (9 ns) was available in time to coincide with the Intel Core i7 release in late 2008, [19] while later developments made DDR3-2400 widely available (with CL 9–12 cycles = 7.5–10 ns), and speeds up to DDR3-3200 available (with CL 13 cycles = 8.125 ns).
2400, 2400 1000 HT Socket 939: 90 San Diego FX-55, FX-57 2600, 2800 Toledo FX-60 2 2600 Windsor FX-62 2800 Socket AM2: DDR2: AMD64, NX Bit, AMD-V: FX-70, FX-72, FX-74 2600, 2800, 3000 Socket F: 130 Athlon 64: Clawhammer 1 2000–2600 800 HT 1024 Socket 754: DDR: MMX, 3DNow!+, SSE, SSE2: Cool'n'Quiet: AMD64, NX Bit (not in CG stepping) 1000 HT ...
DDR3 memory chips are being made commercially, [11] and computer systems using them were available from the second half of 2007, [12] with significant usage from 2008 onwards. [13] Initial clock rates were 400 and 533 MHz, which are described as DDR3-800 and DDR3-1066 (PC3-6400 and PC3-8500 modules), but 667 and 800 MHz, described as DDR3-1333 ...
This is a list of interface bit rates, is a measure of information transfer rates, or digital bandwidth capacity, at which digital interfaces in a computer or network can communicate over various kinds of buses and channels.
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 exactly; the 1333 is rounded) may have a larger CAS latency of 9, but at a clock frequency of 1333 MHz the ...
DDR3-2400 2400 MT/s 0.417 ns 1200 MHz 0.833 ns 13 10.83 ns 12.08 ns 13.75 ns 12 10.00 ns 11.25 ns 12.92 ns 11 9.17 ns 10.42 ns 12.08 ns 10 8.33 ns 9.58 ns 11.25 ns 9 7.50 ns 8.75 ns 10.42 ns DDR3-2600 2600 MT/s 0.385 ns 1300 MHz 0.769 ns 11 8.46 ns 9.62 ns 11.15 ns DDR3-2666 2666 MT/s 0.375 ns 1333 MHz 0.750 ns 15
Compared to DDR3, which operates at 1.5 V with frequencies from 400 to 1067 MHz (DDR3-800 through DDR3-2133), DDR4 offers better performance and energy efficiency. DDR4 speeds are advertised as double the base clock rate due to its Double Data Rate (DDR) nature, with common speeds including DDR4-2400 and DDR4-3200, and higher speeds like DDR4 ...