The speed of RAM, measured in MHz, refers to its data transfer rate. Semiconductor engineers know that CAS latencies are an inaccurate indicator of performance. Overclocking is often thought of in the context of a CPU or GPU, but you can also overclock RAM (random access memory) to achieve faster speeds. DDR2-1066 is important for systems based on AMD Phenom processors, as their memory controllers can utilize the faster memory.
Heres some bandwidth and cache sizes for my CPU courtesy of wikichip.
Its not clear how the original figures were calculated. A 400 MHz data rate multiplied by 8 Bytes per transfer provides 3,200 MB/s bandwidth, hence the name PC3200. Overclocking RAM can result in higher memory speeds and better performance from your PC. Ram is faster 100ns -> 60ns I dont want to draw too many conclusions from this. These SRAMs are typically designed to consume very low power and are used in applications where power is a major concern. The naming convention for finished modules has become its bandwidth, with each module providing 64 data connections for 8 Bytes of data per transfer. Infineons Asynchronous SRAM memory products are classified into two families based on their access time: Low-power Asynchronous SRAMs: These are devices that typically operate in the 45-ns and slower speed range. Consider another example - you may want to run 64GB of RAM at 3600MHz, but to get it to run properly you need to lower the speed to 3000MHz. (This explains the popularity of "PC100" modules that use 7 ns chips.)ĭouble Data Rate (DDR) technology allows data to be transmitted twice per clock cycle, so DDR SDRAM with a 200 MHz clock rate actually has a 400 MHz data rate, and is referred to as DDR400. This allows a wide range of compatibility for higher speed modules in older systems it is common practice for manufacturers to re-label faster RAM at slower speeds whenever the slower RAM ceases production. Once you're where you want to be, you can benefit from faster RAM well, provided that your motherboard can keep up with it. MEMORY,PROCESSOR Username,Memory Latency,元 Latency,DIMMs,Die Type,Rank,Me. Please provide proof of stability via Y-Cruncher AND a memory stability test, otherwise your submission will be removed. If you must choose between more capacity and more RAM speed, we recommend that you first focus on your capacity needs. Zen 4 Sheet is sorted and verified submissions LOCKED each Thursday. For example, 133 MHz SDRAM could operate at 133 MHz, 100 MHz, 66 MHz, or even at speeds of less than 1 MHz, depending on how quickly the system accesses it. As an example, 16GB DDR4-3200 RAM runs at a 3,200 MHz frequency. There used to be another tool called hwinfo, which is no longer available for Ubuntu since 13.10.By design, DRAM maintains its data only as long as a charge is applied to the cells, so there is no maximum cycle time. The procedure is as follows: Open the terminal application or log in using ssh command. This is for a server with ECC memory (as can be seen from the Error Correction Type field and the difference between Data Width and Total Width).īoth tools are dependencies of the ubuntu-standard package and should be available by default on all Ubuntu systems. We dont have to saturate all 8GB of RAM to test the speeds, but it is beneficial to saturate as much of the memory as possible to ensure its pushed to the point where it actually benefits. Use the lshw command with the memory class: $ sudo lshw -C memoryĭescription: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)Īs you can see, I'm using DDR3 1600MHz RAM.Īnother option is dmidecode: $ sudo dmidecode -t memory
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