[citation][nom]JackNaylorPE[/nom]It would appear that we have a situation where people are trying to create absolutes from an article that addresses a specific market segment .... that being those users whose systems are GPU bottlenecked. Granted that probably covers most gamers but not all gamers. Two quotes here negate the "fast memory doesn't matter" for everyone claim."Pushing our game settings to realistic limits, we find that the memory bottleneck no longer exists.""Anyone looking for bigger differences must first create a memory bottleneck by lowering game details and/or resolution, in effect removing the GPU bottleneck that affects a greater number of gamers using real-world settings."What one must conclude from this is the the fps limit is defined, in this test at least, by the GPU bottleneck. In other words, with the GPU bottleneck below the memory bottleneck, faster RAM won't matter. Upgrade ya GFX situation and the memory bottleneck again may becomes relevant. Based upon this analysis alone, we have no way of knowing other than the author's acknowledgement that memory bottlenecks do exist at other settings. I don't understand why this would be a big mystery .... if we can accept that some games are CPU bottlenecked and some are GFX bottlenecked, it should be as easy to digest when memory is substituted for CPU. This is supported by the anandtech article where minimum frame rates in Far Cry 2 jumped 23% in SLI but were relatively unchanged with a single card. The GFX card was the bottleneck w/ one card ... upgrade the GFX to two cards and the memory becomes the bottleneck in SLI. I'd expect that's why, in the anandtech test, when memory dropped 2 CAS numbers, there was a 22.3% increase in minimum frame rates.Simply put, your game experience may be bottlenecked by CPU limitations, GFX limitations or, in some instances, memory limitations .... it will be the weakest link which determines the bottleneck. We can all agree I think that if your GFX card is the "weakest link", getting faster memory is not going to change that.In most builds, the bottleneck is likely to be the GFX card. But in hi-powered 2 or 3 way SLI / CF situations, your investment in RAM should correspond with your investment in GFX.In a system w/ say a P8P67 Pro, 2500k and 560 Ti, would I upgrade the RAM from CAS 9 to 7 ? No. In a system w/ a Maximus IV Extreme, 2600k, tri SLI'd 580's would I upgrade the RAM to CAS 7 ? .... certainly.I should note that I was surprised average frame rates were used instead of minimum frame rates. The anandtech article showed significant impacts on minimum frame rates by lowering CAS .... there was only a small impact on average frame rates there.[/citation]You're right! I've written about the effect of memory bottlenecking in the System Builder Marathon during games, but the systems that showed this effect were all super-high-end CrossFire builds. Far Cry 2 was particularly influenced by memory, but at frame rates so high we dropped the benchmark from the SBM.
Probably would have been good to O/C the CPU higher and use a pair of 6950's. Unfortunately, I don't have a pair of 6950's because...I think the site has a total of four or five of those to spread across four editors in four different locations.