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ASRock X99 Taichi (Intel X99) Motherboard Review

By: Steven Bassiri | Socket LGA 2011 in Motherboards | Posted: Jul 12, 2016 6:11 pm
TweakTown Rating: 91%Manufacturer: ASRock

Circuit Analysis




I think the correct reaction is "wow, let them gears churn!"





For main CPU input voltage power, ASRock is using their 12 phase voltage regulator. The 12 phases are six true phases doubled the right way to 12. Each phase consists of a Fairchild Semiconductor FDMS3668S, which are dual n-channel PowerTrench power blocks. Each power block has a high-side and low-side MOSFET integrated into a single package to increase power density. Each phase also gets a 60A high-current power inductor. ASRock is using their 12K gold solid polymer capacitors for extra longevity.




The PWM is a hybrid-digital Intersil ISL6379, which uses a mix of analog and digital technologies to blend great light-load efficiency with powerful high-load performance. It's a true 6-phase PWM, so to get to 12 phases ASRock is using six ISL6611A phase doublers with two integrated drivers. By using this doubling method, ASRock ensures each phase gets its own driver and that the switching frequency is cut in half to maintain high efficiency.




There are two identical memory VRMs on either side of the motherboard. Each of these VRMs powers four DIMMs. Each one gets a UPI Semiconductor UP1674 PWM that controls two of the same Fairchild Semiconductor FDMS3668S PowerTrech power blocks used in the CPU VRM. The DDR4 VPP rail is powered through a point of load integrated voltage regulator.

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