Before the text, it is first to popularize the relevant memory knowledge.
 Affected by the Intel XMP standard, memory manufacturers have basically adopted the XMP standard as the main memory function. In fact, said XMP technology is also an overclocking technology, but it is more simple and convenient.
XMP is an acronym for Extreme Memory Profile is Intel in September 2007 proposed memory certification standards for DDR3 and DDR4. In order to unify the overclocking numerical standard in the industry, and let each memory manufacturer set a higher memory frequency value to SPD at will , Intel proposed the XMP certification standard. XMP- certified memory records memory speed settings in memory addresses 176 to 254 , and can store up to two sets of settings. If manufacturers need to obtain XMP certification, they must send the memory and the settings to Intel for testing.
After authentication by the XMP which SPD SPD in addition to the default value of the common frequency value, but also to write the SPD higher frequency setting. This higher-frequency setting can be enabled with an XMP- compatible motherboard to overclock memory and improve performance.
Simply put, through the Intel XMP certified memory, there are two or more frequency settings files in the SPD . By enabling these default XMP files on the motherboard, you can automatically overclock the memory to higher values ​​(based on File setting depends.
XMP and manual overclocking effects are basically the same, so it can be seen as an automatic memory overclocking technology.
Apacer Panther DDR4 memory.
The memory specification is 8GB UNB DDR4 2400 CL 16-16-16-36 , where CL 16-16-16-36 is the memory timing, working voltage 1.2V , support Intel XMP 2.0 . Here to explain, this memory is XMP 2400 memory, non- JEDEC 2400 memory, so the default frequency of installed memory is 2133MHz , if you want to reach the frequency of 2400MHz , then you must open the XMP option in the motherboard . (This newbie should pay attention. Maybe you bought a new memory, clearly marked with DDR4 2400MHz , but after checking it, it shows the frequency of DDR4 2133MHz . At this time, you will think that the manufacturer is doing false propaganda, or I just thought that I bought fakes, but I didn't actually open XMP . In addition , I don't have much to say about JEDEC memory. Now that XMP memory has become mainstream , the difference between JEDEC memory and XMP memory is that the former does not require any After the installation, the memory frequency marked by the manufacturer is directly after the installation, and the latter requires the XMP option to be enabled in the motherboard to achieve the memory frequency marked by the manufacturer.)
Test platform hardware information.
Memory installed after the effect.
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1 : Memory frequency 2133MHz (default)
When the memory operating frequency is 2133MHz , the memory timing is 15-15-15-36 , TRFC is 278 , and CR is 2T .
When the memory frequency is 2133MHz , the speeds of Read , Write , and Copy (in MB/S ) in the AIDA64 software Memory Benchmark test are 30996 , 32409 , and 30442 , respectively .
When memory is not turned on XMP , the processor scores 7.6 .
Looking at the score of the entertainment guru, I didn't want to add it, but the PCMark software can't be used, so you can only use it first. Memory performance 10014 , processor performance 68014 , comprehensive performance 150349 .
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2 : Memory frequency 2400MHz (Open XMP )
After the XMP mode is enabled , the operating frequency of the memory rises to 2400MHz . At this time, the memory timing is 16-16-16-36 , TRFC is 313 , and CR is 2T .
When the memory frequency is 2400MHz , the speed of Read , Write , and Copy (in MB/S ) is 33709 , 36532 , and 32936 in the Memory Benchmark test of AIDA64 software , and the memory score is increased by about 10%.
After memory turned on XMP , the processor scored 7.7 , an increase of 0.1 .
Take a look at the scores of entertainment masters, memory performance 10527 , processor performance 71782 , overall performance 154864 . Whether it is processor performance, memory performance, or graphics performance, disk performance , their performance has been improved after the XMP mode is turned on .
But still have to think of ways to do a detailed test with PCMark 8 , because the score of this software is far more convincing than entertainment masters.
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