Review on Patriot Viper Elite Series DDR4 8GB PC4-21300 2666 MHz Memory Module (Black/Grey) by David Dreher

I've had this RAM (2x16GB kit) for over a year now. All the time he was solid with no problems. I ran memtest86 the day I first got it. No mistakes. I'm running this on an MSI Z390-A PRO with XMP enabled. The correct acceleration rate was found immediately. If you are new to this RAM speed, remember that you need to enable XMP to run it at the advertised speed. If you can't do that, then it's a BIOS issue, not a RAM issue. Those who leave bad reviews that they cannot work at the advertised speed. Please do your homework before writing. All your rating does is make you look stupid in front of all the power users and confuse all the newbies. This RAM runs at 2666 MHz as advertised. If your motherboard supports XMP, it will do so automatically once you enable this feature. Otherwise you will have to overclock it manually. In conclusion, for those who are repelled by the term overclocking. Technically, this is not overclocking as the RAM modules are designed for this speed. The problem is that 2133MHz is the industry standard speed. The standard specifies higher speeds, but these refer to "enthusiast" speeds. It simply means that if the motherboard supports it and the RAM is rated to a higher speed specification, it's safe to run at the speed specified by the RAM manufacturer. Not all motherboards support this, so please do your homework again.