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ASRock X299 OC Formula Motherboard Review (Page 3)

By Steven Bassiri from Oct 9, 2017 @ 10:35 CDT
TweakTown Rating: 93%Manufacturer: ASRock

Circuit Analysis




The X299 OC Formula really is quite beautiful.




The motherboard uses a 12+1 phase configuration for the VCore and VCCSA, and ASRock is using Intersil's new fully digital PWM and Smart Power Stages. The ISL69138 is one of Intersil's first fully digital PWM controllers and can be flexible with their outputs up to 7 PWM channels. Here it is used in a 6+1 phase mode doubled to 12+1.





ASRock uses the ISL99227B and ISL99227F 60A Smart Power Stages with excellent internal monitoring and power efficiency characteristics. They can also be cooled on both sides of the chip. To double the phases, ASRock uses six ISL6617 phase doublers.


To get 12 phases from the six the PWM provides, ASRock uses a bunch of ISL6617 phase doublers on the rear of the motherboard. Here we find another ISL69138, most likely used to control the memory controller, and it controls two Sinopower SM7341EH dual N-channel MOSFETs.




Each memory VRM uses the same Intersil ISL69138 digital PWM and two Fairchild Semiconductor FDPC5030 PowerTrech Power Clip dual N-channel MOSFETs for strong memory power delivery. Each memory VRM uses two ISL6596 N-channel MOSFET drivers.

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