I wonder if the 133 CPu strap needed for 4133 works easily for people (and mainboards and CPUs).

I wonder if the 133 CPu strap needed for 4133 works easily for people (and mainboards and CPUs).

Where do you see 133? The bus in the CPU-z shots is at 100MHz at 4133. It is an odd FSB to memory multiplier, for sure...

Where do you see 133? The bus in the CPU-z shots is at 100MHz at 4133. It is an odd FSB to memory multiplier, for sure...

he is talking about Strap http://img.techpowerup.org/151123/capture375-20151123-181418.jpg

I don't think the extra 133mhz is worth it at those timings. 4000MHz_19-21-21-41 is fine but 4133MHz_19-25-25-45 would be slightly slower i think. Only in benches though, so does it even matter in the real world. Doubt it.

Likely very little in it, 4133 for epeen.

Where do you see 133? The bus in the CPU-z shots is at 100MHz at 4133. It is an odd FSB to memory multiplier, for sure...

Oh you are right, I didn't even check on the screen. Though you'd had to go with the 133 strap to get to 4133 (31 multi).

I don't think the extra 133mhz is worth it at those timings. 4000MHz_19-21-21-41 is fine but 4133MHz_19-25-25-45 would be slightly slower i think. Only in benches though, so does it even matter in the real world. Doubt it.

Actually I think in real world use the 4133MHz one would be slower. Based on every real-use benchmark I've seen, such as games, the only times the frame rate differed was when the timings were changed. Increasing those timings by 4 is actually a lot to lose for 133MHz. The only reason I even bothered get high speed DDR3 is because the timings of the DDR3-1600 available at the time sucked anyway, they were about the same. Some expensive kits were 9-11-11-29/28.

Not too bad, however, I still prefer high speed DDR3 ram timings... That said, DDR4 is still relatively new, in time we should get lower frequencies... Never the less, it's a step forward.

The Cas latency can't be directly compared between Ram generations (DDR3 vs DDR4). You are never going to see DDR4 being sold at Cas 10 or Cas 9 for example. Yes it will definitely improve though, we'll likely start seeing DDR4-2133 @ Cas 13 or 12 in a year or so. I did up this spreadsheet when I was researching my Skylake purchase to try to find the best comprise between clock speed and latency. Might help some other people. This spreadsheet shows the actual real latency in nanoseconds you get from various modules. I added a few of the modules that G.Skill just announced to the list for the hell of it. You'll note DDR4-2666 @ Cas 15 has about the same latency as DDR3-1600 @ Cas 9. You're lowest latency is DDR4-3600 @ Cas 16 currently! Really though if your at 10ns or below you'll be fine. Beyond that there are very little gains outside of ram benchmarks. https://docs.google.com/spreadsheets/d/1A7PxX0Gh7llwyzVM3I2d-AvsN0roOX5ryAMddyib0eo/edit?usp=sharing The formula to figure this is: Latency (ns) = (Cas Latency * 2000) / Mhz