Here we are going to compare the different memory kits as they run on the same LGA2011 system. Each memory kit is tested in two modes: 1) automatic configuration with memory timings set up by the mainboard according to the XMP or SPD data (our mainboard couldn't read the XMP of the GeIL EVO Corsa PC3-14900 CL10) and 2) highest frequency with timings selected manually.
First off, we want to carry out synthetic tests of memory bandwidth and latency using the MaxxMEM2 suite that can run both in single-threaded and multithreaded mode.
We’ve investigated the correlation between performance and frequency/timings of DDR3 in our earlier review. The new tests agree with our old findings. Frequency has a higher effect on performance than timings, therefore the DDR3-1867 kits (GeIL EVO Corsa PC3-14900 CL9 and GeIL EVO TWO PC3-14900 CL9) come out on top in the default operation mode. As for the overclocked mode, the kits that notched DDR2-2133 are in the lead. These are the Enhance Corsa PC3-12800 CL9, EVO Corsa PC3-14900 CL10 and EVO Corsa PC3-14900 CL9 kits.
The different memory kits do not differ that much in real-life applications with a few exceptions that make intensive use of system memory.
Memory subsystem parameters may also affect gaming applications.
Of course, a computer's performance is not influenced much by memory frequency, let alone timings. However, if you are an enthusiast in search of maximum performance, you shouldn’t neglect high-speed DDR3 SDRAM. The general recommendations are simple: you will get best results with memory modules that are rated for a higher operating frequency, have a properly written XMP profile and overclock well. Taking all these factors in consideration, the GeIL EVO TWO PC3-14900 CL9 seems to be the best product here. It’s fast both in the default and overclocked mode.
There’s one more fact we can infer from our tests. As we compared systems with base clock rates of 100 and 125 MHz (the latter being necessary for enabling DDR3-1666 and DDR3-2000 modes), we found no special benefits from the higher value. Systems with faster memory are always faster even if they use the standard base clock rate of 100 MHz. It proves the theory that the base clock rate is increased from 100 to 125 MHz inside the CPU on LGA2011 platforms and has no effect on the other components.
In other words, you should strive to clock your DDR3 SDRAM as high as possible irrespective of your base clock rate in order to achieve maximum performance.