Single channel 8GB vs Dual Channel 16GB

[George Dirac]

Hello, I had Corsair Vengeance 1600MHz C10 2x8GB rams, I had to change them because I discovered that they weren't compatible with my new Noctua NH-D15 cooler. They were running in dual channel. When benchmarking using AIDA64, I had these results: http://i.imgur.com/bEU3HVC.png

Now I have HyperX Savage 1600MHz C9 1x8GB ram (I am planning to add another one) which is advertised with even better latency (currently running at 9-9-9-27) but results I get with the same benchmark is this: http://i.imgur.com/zucBfWX.png

Now, that's half the amount of read, write and copy speeds. granted latency is better but shouldn't 1600MHz modules have at least similar read, write and copy speeds? I don't know but I doubt that running in dual channel would double performance. Now I worry that adding another would be waste if this ram model is not as fast as vengeance ones.

P.S please don't tell me that I would not notice the difference either way, I know that even when speeds are that different, I wouldn't notice them in normal use. I don't care about that, I care about the numbers.

 

[Ra_V_en]

Well actually dual channel does that:
http://www.legitreviews.com/ddr3-memory-performance-analysis-on-intel-x79_1779/3

In applications that rely on memory performance especially memory benchmarks that will likely double the memory throughput.

 

[George Dirac]

Well actually dual channel does that:
http://www.legitreviews.com/ddr3-memory-performance-analysis-on-intel-x79_1779/3

In applications that rely on memory performance especially memory benchmarks that will likely double the memory throughput.

wow, that is awesome article, thanks for that. I read I think here that someone said difference between single channel and dual channel in benchmarks was no more then 10%. I feel better now, and will add another one for dual channel performance.

 

[jitpublisher]

These are bench marked speeds, and running memory in dual channel mode doubles the maximum bandwidth of a single channel memory stick. However, even looking at the single channel memory stick, that is actually quite a lot of bandwidth, not many circumstances on a home desktop computer, or gaming machine, would that amount of bandwidth speed to be a bottleneck to the point that you would notice a big difference sitting in front of the machine. That is why we say in real world use, the difference is more like 3-15%.

And about Sisoftware Sandra, the benchmarks it comes up with are not great indicators of real world performance. So its nice to look at, but don't get too hung up on the numbers it tosses out. Look closer and you will see that other benchmarking running actual apps or programs, with only a few exceptions, display a pretty flat performance line across the board.

 

[George Dirac]

These are bench marked speeds, and running memory in dual channel mode doubles the maximum bandwidth of a single channel memory stick. However, even looking at the single channel memory stick, that is actually quite a lot of bandwidth, not many circumstances on a home desktop computer, or gaming machine, would that amount of bandwidth speed to be a bottleneck to the point that you would notice a big difference sitting in front of the machine. That is why we say in real world use, the difference is more like 3-15%.

And about Sisoftware Sandra, the benchmarks it comes up with are not great indicators of real world performance. So its nice to look at, but don't get too hung up on the numbers it tosses out. Look closer and you will see that other benchmarking running actual apps or programs, with only a few exceptions, display a pretty flat performance line across the board.

Thank you for your input! Yes I realize (as I said in my original post) that in real world examples, difference is barely noticeable (if at all), so I wasn't alarmed by it's performance because I love my new memory modules. I was alarmed by difference in speed numbers (in memory benchmarks) between 2 different memory modules, when they are both running at 1600mhz. I am just glad that the fault was not quality of my ram but channel mode.