![]() ![]() So, why would someone buy these modules? Someone would buy them for overclocking. So, they won’t automatically run at 2,133 MHz nor automatically achieve the 17,000 MB/s transfer rate. If you install it on a regular PC system supporting DDR3 memories, they will probably run at 1,333 MHz (DDR3-1333) – which the maximum DDR3 standard speed –, achieving a maximum transfer rate of 10,664 MB/s (or 21,328 MB/s if they are running under dual channel mode, read our tutorial on dual channel to understand more about this subject). This is the maximum clock rate they support, not the clock rate at which they will be running. Even though they are labeled as DDR3-2133, they won’t run at 2,133 MHz automatically on your system. ![]() Actually, this is a very common misjudgment.įor example, let’s say that you bought a pair of DDR3-2133/PC3-17000 memories. If the memory module is installed on a system where the memory bus is running at a lower clock rate, the maximum transfer rate the memory module will achieve will be lower than its theoretical maximum transfer rate. Maximum Theoretical Transfer Rate = clock x 8 As 64 / 8 equals 8, we can simplify this formula to: Since DIMM modules transfer 64 bits at a time, “number of bits” will be 64. Maximum Theoretical Transfer Rate = clock x number of bits / 8 The maximum transfer rate for a memory module can be calculated through the following formula: Patriot 16GB(2x8GB) Viper III DDR3 1600MHz (PC3 12800) CL9 Desktop Memory With Black Mamba Heatsink – PV316G160C9Kįigure 1: A DDR3-1333/PC3-10666 memory module ![]() KOMPUTERBAY 2GB (2 x 1GB) DDR DIMM (184 PIN) 400Mhz PC3200 CL 3.0 Desktop MemoryĭUOMEIQI 8GB Kit(4X 2GB) 2RX8 DDR2 800MHz DIMM PC2-6300 PC2-6400 PC2-6400U CL6 1.8v 240 Pin Non-ECC Unbuffered Desktop Memory RAM Module Compatible with Intel AMD System ![]()
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