Our experience indicates that most modules won't get warm at 1.35V unless they're crammed closely together. That's not going to be a problem when placing four DIMMs on an eight-DIMM X99 motherboard, though users who wanted the fans for either custom overclocks or future support of additional modules will find that the price difference between Corsair's fan-equipped DDR4-3200 and its fan-free DDR4-2666 is less than the cost of the fans. From a value perspective, so far so good. Here's how Corsair Vengeance LPX 8GB ratings compare to other 16GB quad-channel kits we've tested.Running Corsair Vengeance LPX 8GB on an LGA 2011-v3 motherboard requires firmware support for a 12x memory multiplier, using the CPU's 4:3 (1.33x) memory controller to core ratio with a standard 100 MHz BCLK. Double data rate pushes 3200 MT/s from the resulting 1600 MHz clock rate.We mention firmware support because most of last year's X99 firmware had a 10x limit, requiring an increase in BCLK "Strap" and custom CPU multipliers to approximate the correct data rate. This is our friendly reminder that if you're upgrading to newer components than your firmware was optimized to use, a firmware update should be first on your to-do list.