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Can I use DDR2 RAM in DDR3 slot?
While both types of modules have similar numbers of pins, the notches in the PCB are in different locations. In other words, a DDR3 module cannot be placed in a DDR2 memory socket, and vice-versa.
What is the highest clock speed for DDR2 RAM?
DDR2 memories include 400 MHz, 533 MHz, 667 MHz and 800 MHz versions, while DDR3 memories include 800 MHz, 1066 MHz, 1333 MHz and 1600 MHz versions. Both types double the data rate for a given clock frequency.
What are the advantages of DDR3 over DDR2?
DDR3 SDRAM is an improvement over its predecessor, DDR2. The primary benefit of DDR3 is the ability to transfer data for I/O at 8 times the speed of its memory cells, thereby enabling faster bus speeds and higher peak throughput than earlier DRAM memory technologies.
What type of RAM might slow system performance?
Buffered RAM improves stability on systems with a lot of RAM (over 1 GB) but it might slow system performance. Unbuffered memory does not have a buffer to hold memory addresses or data before it is transferred to the memory controller. Unbuffered memory can be found in servers and high-end workstation.
When was DDR2 phased out?
Double Data Rate 2 Synchronous Dynamic Random-Access Memory (DDR2 SDRAM) is a double data rate (DDR) synchronous dynamic random-access memory (SDRAM) interface. It superseded the original DDR SDRAM specification, and was itself superseded by DDR3 SDRAM (launched in 2007).
Is a CAS latency of 19 good?
RAM speed vs. DDR3 RAM usually has a CAS latency of 9 or 10, while DDR4 will have a CAS latency of at least 15. However, because of its faster clock speeds, the newer standard has better performance overall.
What is the CAS latency of DDR3?
DDR3 usually has higher CAS latency:While the typical latencies for a JEDEC DDR2 device were 5-5-5-15, the standard latencies for the newer JEDEC DDR3 devices are 7-7-7-20 for DDR3-1066 and 7-7-7-24 for DDR3-1333.
How many nanoseconds does a DDR3 cycle?
“Because cycle time is the inverse of clock speed (1/2 of DDR data rates), the DDR-333 reference clock cycled every six nanoseconds, DDR2-667 every three nanoseconds and DDR3-1333 every 1.5 nanoseconds. Latency is measured in clock cycles, and two…
Will DDR3 memory be faster than DDR2?
Eventually, DDR3 modules will likely be able to run at lower latencies than the JEDEC specifications. It is possible to find DDR2 memory that is faster than the standard 5-5-5-15 speeds, but it will take time for DDR3 to fall below the JEDEC latencies.
What is the difference between DDR2 and DDR3-1333 memory?
As with DDR2, higher “nonstandard” speeds are also available, but standard speeds are what most buyers need to be familiar with Compare Prices on DDR3-1333 Memory.