lol the "real world benefit" is bragging rights at LAN partiesatminside :at what point would timing start to degrade performance?
The timings are fast enough that with quad channel performance, there's not a big loss of performance. The way to look at it is GHz is bandwidth and CAS/CL is speed. There is a formula for figuring out how fast it is in nanoseconds, but it's pretty reliably between 10 and 12 nanoseconds for modern RAM. Really Really fast RAM is like 8 nanoseconds, but when you compare frames per second for fast RAM and slow RAM it's like a 1 or 2 % difference. There's absolutely no real world benefit of having blazing fast RAM.
Are you for real ? You know the cache memory on a CPU is like few megabytes... how can you even say, your game must avoid using memory because bad performance?In games RAM speed might not matter but for everything else...
The caches on the CPU are running at hundreds of gigs per second. DDR3 memory tops out at 5 gigs/s. So, games that use RAM memory ... bad game. Poor performance. You want to avoid getting anything from memory as much as possible once the game is loaded.
The way those numbers ended up, I'd go ahead and arbitrarily take the natural log of them to get a relativity benchmark to show linear progression.I personally take the first 3 cas timings and add them together. Divided by 3 then divided by speed. The end number is a performance number I use to scale whats better.
(((9+9+9)/3)/2200)=244.44 <----- DDR3
(((16+16+16)/3)/3300)=208.31 <----- DDR4 dual channel
(((16+16+16)/3)/3300)x2)=416.63 <----- DDR4 quad channel
This isn't 100% on key but it really helps. Personally DDR4 timings and speed isn't ready. DDR4 with quad seems nice but once the dual channel DDR4 boards release we will need much higher clock speeds or much lower CAS timings to compete with DDR3 in its prime.
Fyi, im running Gskill 2400Mhz 16GB kit @ 2200 cas 9-9-9-27 @ 1.67v w/o any problems in years.
+1. In the case of desktop CPUs, they'll hit their limits long before they ever approach the limit of the RAM itself. No point in having all that extra speed overhead when you'll likely never use it.I think you`re mistaking... most PCs use 1600 Mhz... the rest is just for show or in some cases only APUs can make use of the higher speeds.
not true on two counts. originally i built my computer using 4x4GB crucial 2133MHz RAM. while running said i was unable to overclock my CPU past 4.2GHz without having stability issues. after upgrading to 4x4GB G.Skill 3000 MHz RAM i am now able to run my 5930K stable at 4.7GHz and my video rendering times went down by about 30% overall. 10% without a CPU overclock, just faster ram.Really Really fast RAM is like 8 nanoseconds, but when you compare frames per second for fast RAM and slow RAM it's like a 1 or 2 % difference. There's absolutely no real world benefit of having blazing fast RAM.