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MSI X299 XPOWER GAMING AC Motherboard Review

By Steven Bassiri from Sep 27, 2017 @ 9:50 CDT
TweakTown Rating: 92%Manufacturer: MSI

Circuit Analysis

 

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The X299 XPOWER GAMING AC reveals its secrets without its heat sinks.

 

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The VRM on the motherboard for the CPU VCore is made up of 12 phases; six PWM channels are doubled to 12. The IR35201 is being used in 6+1 phase mode, with the +1 being used for the CPU's VCCSA, so you get a total of 13 phases under the VRM heat sink. Each VRM phase for the VCore and System Agent uses an IR3555M 60A fully integrated PowIRstage.

 

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Six PWM doublers can be found on the rear of the PCB. An IR35204 digital PWM is used to control the single phase for the VCCIO, which uses a NexFET CSD87350Q from Texas Instruments and a CHL8510 driver.

 

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Both memory VRMs use Primarion PV4210 digital PWMs, which are located on the rear of the motherboard. Each memory phase uses two 25A/40A NexFETs, the CSD87350Q.

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