BIOS Frequency & Voltage Settings
The X99E-ITX/ac includes a similar range of settings compared to its larger siblings, lacking only a little PCH and DRAM voltage for the sake of compact system thermal limits. Yet, even those two reduced settings far exceed anything we’d need for safe-and-sane O/C evaluation.
As discussed in the firmware section of this review, thermal throttling forces the use of a lower CPU core voltage to retain a consistent O/C frequency. At 1.225V CPU core, the board still pushes our Core i7-5960X to 4.3GHz. This is also the first ASRock motherboard we’ve tested to exceed DDR4-3200, though we’re not sure how much of this feat is due to firmware advancement, and how much is due to the missing third and fourth DIMMs.
The DDR4-2666 test lets us see how different boards optimize timings for non-native data rates. The X99E-ITX/ac has only half the memory channels of its microATX competitors, yet still produces more than half the bandwidth.