Originally Posted by fateswarm
What I don't get is that while that independence exists, why do people claim faster RAM won't affect much performance after Sandy Bridge. I don't get it. I don't claim it's wrong. I just don't see the reason this occurs.
Are the chipset routes the bottleneck or something?
It has always been the same, people just catch on to things at different times.
If you read Intel CPU specs, max memory speed is DDR3-1333/DDR3-1600. What does this mean? Intel only designs for DDR3-1600 max. Bandwidth/throughput is limited, unless it is tweaked otherwise. How do we make a computer faster ? OC! OC what? everything frequency possible. The ones that affect RAM are CPU, QPI, NB, and so forth. So if you compare stock CPU with DDR3-1600 to DDR3-2400, of course there is not much difference. The stock CPU is designed for DDR3-1600. Once you OC CPU and NB, then you will notice a significant difference.
With AMD, many people did not fully take advantage of DDR3-1600 and higher speed RAM either. e.g. Phenom II was designed for DDR3-1333, for DDR3-1600, you must OC CPU-NB as well to utilize the performance and improve bandwidth. Otherwise, there was not much difference between DDR3-1333 and DDR3-1600+.
As far as "real world performance" many people like to talk about, what is your real world? If you play solitaire and look at some websites, a Pentium 4 computer can do that very fast! If you do 3D or video editing and need great bandwidth to transfer large files, i7-3960X and such CPUs rule your world. With DDR3-2400 and basic CPU OC, it is a dream for professionals. Professionals will never use DDR3-1600 again if they know about performance overclocking.
Most people and their "real world" can not benefit from extreme RAM, so from their perspective it's easy to see there is no benefit. Fact is, there is no way companies like G.Skill can sell DDR3-3000 8GB for $1,000+ if it does not improve a computer at all. Why do they offer it? Rip people off blatantly? I don't think so for such respectable OC company.
Sorry for long essay, but just providing knowledge so people can hopefully understand things with one reading.