G.SKILL Showcases Extreme DDR4 Memory Kits up to DDR4-5066MHz at Computex 2018

[Tomorrow]

I feel like nit-picking.
5066 MHz? Not really, no. The correct term is 5066 MT/s (up to 40 528 MB/s).
2533 Mhz is the I/O bus speed. 633 Mhz is the clock speed this memory actually runs on

Well you always feel like nitpicking so let's address that:

40528 MB/s . That is what? Read? Write? Copy?

In dual channel configuration 3200Mhz CL16 already achieves excess of 48000MB/s on AM4. Assuming linear scaling that would put 5066 kit at around 76000MB/s. Already nearly double the number you quoted. Also what MB/s anyone achieves is platform (meaning CPU+MB) dependant (to a degree).
You are correct about the I/O and SDR clocks but you forget that most programs/games take advantage of the quad data rate of DDR4.

So all in all i see no problem calling these 5066Mhz. No need to confuse people further by breaking things down to base clocks. In the end what matters is the effective clock.

 

[londiste]

Transfer, theoretical max per memory module. Realistically you will not get quite as much.
5066M Transfers per second. Each transfer is 64 bits (8 bytes), 40 528 MB/s.
Dual channel is dual channel, so twice as much. Max for dual channel for this DDR4-5066 kit is 81 056 MB/s.

DDR has dual data rate - 5066 transfers off of 2533MHz clock rate on the I/O bus.
In addition to that, I/O bus has a clock multiplier of 4 (DDR had 1, DDR2 had 2, DDR3/4 have 4).
That multiplier (and larger prefetch and increased latencies as result) was at least initially intended to keep power consumption in check (RAM chips at lower actual clock).

Edit:
Besides, that 5066 is just for show anyway. Latency is much more evil than pure transfer rate for RAM. CL21 is a lot even at that speed and rest of the timings are worse. Latency-wise - 4600CL19 would be faster, 4000CL17 would be about the same, 3200CL14 would be a touch slower.
As you said before, 4800CL17 is the best of the bunch and 4600CL18 at 2x16GB is also much appreciated.

Similarly, not too sure about that 4000CL18 kit for Ryzen. 3200CL14 would be almost as effective and definitely easier to get running even on Ryzen 2xxx.

 

[phill]

You are thinking about that now, lmao, i have forgotten for how many years i have been using G Skill.

I've been running G Skill since my X58 days, so about 6 or 7 years now Some of the nicest and overclockable ram I've used