The higher CAS's are offset by the frequences of the higher technologies so that even though the DDR2 and DDR3 take more cycles, they also go through more cycles per unit time than DDR. the highest possible clock speed of ddr2 is 1333MHz while there are already 1800MHz ddr3 sticks being produced. If you still have your doubts, do the math!"īased off of the cycle-based latencies of the DDR-333 (CAS 2), DDR2-667 (CAS 4), and DDR3-1333 (CAS8), and their frequences, you come to the conclusion that each of the memory types will retrieve memory in the same amount of time. ddr3 can achive much higher clock rates than ddr2. Is DDR3/1600 the same as PC3-12800 DDR3 and PC3 mean the same thing, one rates by clock speed, the other by data bandwidth. That’s about a 17 improvement on memory bandwidth over DDR3-1333. 30 days with Kingston System Specific Memory Memory products provider Lexar Media announced on Wednesday the availability of Crucial 4GB DDR3-1333MHz ( PC3-10600) non-ECC UDIMM memory modules. The module is a 204-Pin SODIMM module made specifically for Dell notebooks. Latency is measured in clock cycles, and two 6ns cycles occur in the same time as four 3ns cycles or eight 1.5ns cycles. DDR3-1600 memory has a module classification of PC3-12800, which effectively means the peak data rate of the module is 12.8GB/sec (see table). The KTD-元B4G memory module features 4GB DDR3 memory at 1333MHz PC3-10600.
"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. Most machine should work with mixed memory modules (133. You will probably not get a sizeable difference going to PC312800 (DDR31600). 09th if you order now & choose one-day shipping. In your case you have PC310600 (DDR31333). Dell DDRMhz PC3-10600 Sodimm Laptop RAM Memory Stick - Working Pull. I have a question: on your page 3 where you discuss the memory myth you do some calculations: Answer (1 of 2): As already mentioned, you should stick to whatever ram you already have existing in your machine.
: Test Settings: Overclocking Comparison.Your MacBook was designed for PC3-10600 DDR3 SDRAM, its best to stick with what Apple expects. So DDR3-1600 means it is 800Mhz with a double rate (effectively 1600Mhz). But thats only the modules ability not what the system is running its memory bus speed at. What PC3-12800 800Mhz PC3-12800 DDR3-1600. : PDP Patriot Extreme Performance PC3-10666 Low Latency 12800 MB/s (DDR3-1600) Vs 10600 MB/s (DDR3-1333) This is the speed of the RAM Clearly DDR3-1600 is able to run faster than DDR-1333.: OCZ PC3-10666 ReaperX HPC Enhanced Bandwidth.
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