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These modules are assembled on the basis of overclocked chips as indicated by their voltage 1,65V - on JDEC DDR3 uses standard voltage 1,5V (1,35V for DDR3L) when using memory chips at a nominal frequency, and if nominal voltage higher than these modules value, the chip module to work in a factory overclocking. In addition JDEC DDR3 specifications include nominal number recorded in the SPD modules frequencies 533, 667 and 800 MHz, which corresponds to the specifications DDR3-1066, DDR3-1333, DDR3-1600, and a high-frequency modules use XMP profiles that must be correctly interpreted by the RAM controller in the chipset or the CPU chip and firmware code system board computers. If the memory controller or (and) firmware and can not decipher the entries in the XMP, the operating modes of the module are set by SPD or manually.
Also, the presence of radiators on the memory modules immediately spoke about the use of emergency modes of chips exceeds a predetermined TTC in their nominal value, but not exceeding the allowable safe limits for them. This is a common industry practice, and provided that the stabilizer of RAM the motherboard power supply produces the desired voltage at high load current consumption, and the memory controller can work with smaller time intervals is nothing terrible in it is not present, and the use of factory overclocking memory modules does not cause deterioration of the computer settings.