HyperX Predator DDR4 RGB 16GB Kit of 2 (2 x 8GB) 4000MHz CL19 DIMM XMP RAM Memory with Infrared Sync Technology

A stated in title, this is CL19@4000mhz, it is CL17@2400. It is also Samsung B-Die, was able to run it CL14@3466 with Ryzen Dram Calculator on my 2600X Ryzen chip. Love it, fast af, price wasn't bad, very nice looking. Don't care for RGB blah blah, but it isn't over the top sunglasses required so meh. Hope this helps.

The specs speak for themselves. Great looking ram and obviously fast performing with 16gb being all you’ll ever need for gaming. Can’t recommend these highly enough.

Nothing bad to say about this set of RAM. It failed to post when first installed but that was my fault I placed them in the wrong slots for only using two channels of memory. They aren't to thick and the RGB looks pretty good. I like these as apposed to the Neo sticks because the RGB is in a straight line.

UPDATE: some motherboards download a random RGB software for these from Crucial for their rgb m.2 drives that does nothing but hinder performance. I now get better stability at 3666mhz than I did at 3600mhz after removing the softwareI just put together my Ryzen build with a 3900x on an x570 board. They have definitely surpassed Intel on processors, so I made the switch to team red.However, the way their infinity fabric works between the memory and CPU has been a learning process.The XMP profiles that come on these sticks are not very good when it comes to latency, which negates the high speeds. I only got the 4000mhz model so I could actually downclock to 3666mhz or 3600mhz(with my own timings, the XMP is slow as heck). This is because the infinity fabric doesn't like going too far above 1800mhz and the 1:1 ratio with your RAM is better than a higher RAM clock with a 1:2 ration between RAM and the infinity fabric.To get the most stability at a 1:1 ratio, I couldn't go past 3666mhz RAM and 1833mhz Infinity Fabric. However, with these particular sticks, I had to individually change each timing value one digit at a time until it wouldn't boot to find the perfect sweet spot. For some reason none of the timings on the Ryzen RAM calculator work very well.TL;DR: the sticks are good, the XMP sucks. The hours spent adjusting each timing value is worth it for Ryzen processors.