Articles: Memory

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Tests have been completed and it is very interesting to see how much of a gain we get when we increase the memory frequency that dramatically? At first let’s compare the performance of a system working in nominal mode with the system where memory frequency is increased to 1867MHz. We’ll start with special memory benchmarks, such as Everest 5.0, BenchDLL version

The performance boost is gigantic, between 30 and 52%! And what will we see if the performance depends not only on the memory subsystem, but also on the CPU or graphics card?

Here things a little more modest, I should say, and the minimal frames per second in Crysis Warhead are even considerably lower. However, these results vary too much during different test cycles. For example, during the first test cycle the minimal fps rate was only a little over 17fps in all ten runs. The table below shows the average of the second ten runs, and third time we would have most likely got a third number, so I wouldn’t take this parameter too seriously. However, the overall performance boost resulting from the increase in the memory frequency from 1067 to 1867MHz is not very breath-taking. Let’s check out the results during overclocking, to see if the performance gain is going to be more noticeable. We will start with Everest benchmarks.

The improvements are quite noticeable for the latency and read speed, while for the write speed and copy speed – not really. What will the tests in other applications show?

Unfortunately, the performance gain is mostly minimal, less than 1%, i.e. could be considered being within the measuring error. I have to admit that it is very disappointing. However, we did have to lower the memory frequency quite noticeably, even though the timings have been lowered accordingly. Maybe this is why we do not see a significant performance boost? Let’s repeat the tests with the CPU overclocked to 181MHz base frequency. In this case not only the memory frequency is close to the maximum, but the timings can be lowered from CL9 to CL8. It is a simply ideal situation to reveal the advantages of high-frequency memory:

The situation in Everest test reminds us of what we have just seen I the very first table: the system with high-frequency memory is way ahead. Let’s check out other applications now:

Unfortunately, we didn’t see any significant advantages. Like in the previous cases, the performance improvement is most evident in a multi-threaded Custom PC Bench test. During this test there is a video being played back while 7-zip archives some files in the background. It is a very real situation: say, you are watching a movie and the operating system starts backing up and archiving the files. It’s a pity that this is the only other type of scenario besides Everest benchmarks when we see an indisputable advantage of high-frequency memory.

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