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GIGABYTE X99P-SLI (Intel X99) Motherboard Review

By: Steven Bassiri | Socket LGA 2011 in Motherboards | Posted: Apr 26, 2016 1:10 pm
TweakTown Rating: 91%Manufacturer: GIGABYTE

Circuit Analysis




This motherboard looks quite good in the nude.





Haswell-E CPUs only require a single input VRM to supply power to the internal VRM. In this case, GIGABYTE has used a true 6 phase VRM utilizing some of the highest power density components available on the market. The inductors support 76A saturation current each, and the capacitors are custom-made 10K polymers.




The PWM is International Rectifier's latest fully digital high-performance PWM. The IR2580 supports up to 8 phases, but only 6 are used in this case. Each phase uses an IR3556 PowIRstage, which supports up to 50A at 10W. This VRM configuration isn't unique to the X99P-SLI, a lot of other GIGABYTE X99 motherboards use the same components that have been proven to work well.




X99 requires two sets of two memory VRMs. The main DDR4 voltage and the VPP rail must come from VRs, and each set of four DIMMs gets a set of VRs. GIGABYTE has chosen to use an IR3570 fully digital 3+2 phase PWM along with two IR3553 40A power stages for the main voltage and a single IR3553 for the VPP. This power configuration is used for each set of DIMMs.




The extra pins in the socket that improve overclocking provide extra power and ground. GIGABYTE uses nine RT9018 linear regulators in an array controlled by an IT8792E embedded controller to provide power to these extra pins. You can control some of these voltages through the UEFI, and they only appear with the CPU Mode switch is in position 2.

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