AMD Bulldozer FX-8150 Processor Review

Author: MAC
Date: October 11, 2011
Product Name: AMD FX-8150
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Feature Test: DDR3 Frequency Performance Scaling

One of the cool new features that AMD has implemented with their new 32nm processors, first on the Llano APU’s and now on Zambezi, is native support for DDR3-1866 memory speeds. Phenom II's really did not excel at hitting very high memory frequencies, achieving close to DDR3-2000 was an immense struggle, but Llano can handle DDR3-2400 and above extremely easily. We aren't actually going to be testing those insane frequencies today, but we are interested in determining whether Zambezi benefits from higher memory bandwidth.

Click on image to enlarge

In order to do this test, we benchmarked the FX-8150 with a G.Skill RipJawsX 8GB memory kit running at DDR3-1333 7-7-7-1T, and with the same kit overclocked to DDR3-1866 9-11-9-1T. This represents two easily attainable and relatively affordable specifications.

Basically, no difference. What this tells us is that Zambezi parts are not being bottlenecked by the memory subsystem. So you can buy cheaper memory without worrying about impacting the FX-8150's performance. Sure if you can find some 1866 8-9-8 or 1866 7-9-7 (or higher) memory kits you might see a small performance boost, but its probably not worth the two to three-fold price premium for those kits.

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