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EVGA X299 Dark (Intel X299) Motherboard Review (Page 3)

By Steven Bassiri from Jul 11, 2018 @ 10:00 CDT
TweakTown Rating: 95%Manufacturer: EVGA

Circuit Analysis

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The motherboard is hiding a lot under its heat sinks.

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On more recent high-end X299 motherboards most everyone is using Intersil's brand new ISL99227, as they seem to be better for this platform than traditional IR alternatives. The 60A Smart Power Stages offer an exposed metal top that greatly improves their cooling. Here we find them in a 12 phase configuration. These new power stages are brand new and offer per phase temperature and current monitoring, which helps both monitoring and internal protection. The new PWM controller, the Intersil ISL69138 is used in a 6+1 phase configuration here. The first six phases are doubled to 12 by six ISL6617 phase doublers. Each phase here uses a 71A inductor, which is solid for the 60A power stages.

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An Intersil ISL99140 takes the last phase from the main PWM controller and is used for the VCCSA voltage; it's a DrMOS rated for 40A. The VCCIO uses an IR35204 PWM controller with a 60A IR3556 PowIRstage integrated power stage.

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Each set of two DIMMs gets their own 60A Intersil ISL99227 60A Smart Power Stage and ISL69133 PWM controller. The DDR4 VPP come from a 9A IR3899, which is a single phase PWM and power stage integrated into a small package.

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