Originally Posted by Cloudpost
thats great information. I knew there is a reason why some ram is more expensive then others, just needed the proof.
what about BE processors where they can just raise the cpu multiplier . Is fast/tight ram important then?
Actually we do not know that more expensive RAM OC's better than value RAM of the same rated frequency. It may or may not. Many people have been very successful OC'ing value RAM. Often value RAM uses the identical ICs but a plain Jane heat sink outer shell. Those fancy top mounted heat sinks cost more so a mfg. charges more. And because they look "sexy" to some folks the RAM mfg. can charge a significant premium over value RAM - which may perform identical.
Unfortunately with DDR3 RAM neither the frequency nor the latencies make any tangible improvement in system performance unless you are able to double the frequency which few folks are actually able to do. Then you might see 2-3% system improvement, might? The only exception to this is AMD APUs which do benefit from faster RAM frequency as both the CPU and GPU use the faster frequency.
1600 MHz. RAM seems to be the price and performance sweet spot at the moment. You won't know if 1600 value or expensive RAM will OC better or the same unless you actually test numerous RAM kits to see. Though there is no system performance gain to speak of the FX CPUs use 1866 MHz. RAM by default but can also run slower RAM without issue. Many 1600 MHz. rated DIMMs will also run at 1866 MHz. on an FX CPU.
Since there is little to nothing to be gained from OC'ing the RAM but a lot to be gained by OC'ing the CPU clockspeed, then many folks leave the RAM frequency close to the default OE RAM frequency and up the CPU clockspeed for best performance. In OC'ing what works for one person is not necessarily what works for another. The fun of OC'ing is finding out what works best for your given hardware. More expensive RAM does not guarantee that you can OC your CPU any higher than value RAM.
Enjoy ! Edited by AMD4ME - 1/23/12 at 11:28am