Adding to the discussion here, I got this RAM kit for my AMD Ryzen build and it's great. The software is based on ASUS Aura, though it's a rebranded Aura app with the G.Skill logo. I believe there is a way to use it with the ASUS Aura app as well, but unfortunately I had to return my ASUS motherboard (bricked itself) so I can't test that. The LED controller does not affect RAM speed at all, as it does not use the DDR memory interface at all. All DDR RAM modules since DDR1, possibly even earlier, have a small EEPROM nonvolatile memory chip on them called the SPD EEPROM (serial presence detect), this chip stores the timings, XMP profiles, model number, etc. data so that the PC can identify the RAM and autoconfigure the correct settings for it. This EEPROM chip is connected over a secondary communication interface called SMBUS, which itself is a slightly restricted version of I2C. Your chipset/southbridge contains at least one SMBUS host controller, and that's how the PC hardware communicates with the SPD EEPROM. G.Skill uses this SMBUS interface for their LED controller, not the main memory bus. I'm working on reverse engineering this protocol so I can write a Linux driver for the RGB controller and integrate it into my RGB music visualizer application. I managed to send a command set using i2cset on Linux that changes the color of the RAM, so I should be able to reimplement it properly soon.