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tmcthree
05-03-2012, 03:03 PM
Hi this is similar to a question I posted yesterday regarding ram clocks...but

Would quad channel memory imrove rendering times compared to dual channel memory.
(Obviously assuming appropriate mobos)

qwatkins
05-03-2012, 04:03 PM
...Would quad channel memory imrove rendering times compared to dual channel memory.
(Obviously assuming appropriate mobos)Here is a fairly verbose description on the subject:

http://www.hardwaresecrets.com/article/Everything-You-Need-to-Know-About-the-Dual-Triple-and-Quad-Channel-Memory-Architectures/133/1

"The dual-, triple-, and quad-channel architectures work by increasing the number of data wires available in the memory bus, doubling, tripling or quadrupling the available bandwidth, respectively.

It is very important to notice that this performance increase is achieved only on the memory subsystem; doubling the theoretical memory performance does not translate into a computer that is twice as fast. Only a small percentage of this memory performance increase will be reflected on the overall system performance."

In regards to rendering specifically it really is just a question of performance. So since there are only relatively small gains by having quad-channel vs dual vs non then you will see at most small gains from quad channel. As has been abundantly stated if you "run out" of RAM for your rendering and your system starts to use virtual (HDD/SSD) for RAM then you will see a significant degradation in performance because, essentially, latency in RAM is measured in nanoseconds (most RAM is in the neighborhood of 10 nanoseconds) and latency in HDD is milliseconds (around 4-8 for platter mag type and SSDs are about 65ish microseconds). Take a look here (http://www.unitconversion.org/unit_converter/time-ex.html) Either way you slice it you are talking orders of magnitude more latency, and its the latency that slows down the entire process in conjunction with the bandwidth, which is another facet but I won't get into that.

Moral of the story if your budget is fixed err on more "slower clocked" RAM vs less "higher clocked" RAM and don't lose sleep over the channel stuff. :thumbsup:

imashination
05-03-2012, 05:07 PM
in short, quad/triple channel can get you 5% more fps in games, 1% faster renders. In general its hardly worth your time.

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