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GIGABYTE X299 AORUS Gaming 7 Motherboard Review (Page 3)

By Steven Bassiri from Jul 24, 2017 @ 23:35 CDT
TweakTown Rating: 93%Manufacturer: GIGABYTE

Circuit Analysis

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The X299 AORUS Gaming 7 looks awesome without the heat sinks. However, those empty spaces are where the difference between the Gaming 7 and Gaming 9 become more obvious.

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The motherboard uses a very powerful eight true phase VRM without doublers for the VCore/VIN. It's controlled by an Infineon digital PWM, the IR35201, in 8+0 phase mode.

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Each phase for the VCore/VIN uses an IR3556, 50A 2nd generation PowIRstage fully integrated power stage from Infineon. We also get 70-76A high current Cooper Bussmann power inductors and 10K FP caps. The secondary rails use IR3553 40A integrated PowIRstage power stages; as those rails don't require much power. A few of Infineon's new IR35204 3+1 phase PWM controllers are used to control the secondary rail VRMs (like VCCSA and IO), main DDR VRM, and DDR VPP VRM. Some of them are very close together as there are just so many power rails.

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The inductors used on the memory rails are not the same as on the CPU, but then again you don't need 50A per phase for DDR4. Here we find two more IR35204 digital PWMs from Infineon/International Rectifier.

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