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ASUS PRIME X299-DELUXE Motherboard Review (Page 3)

By Steven Bassiri from Jul 14, 2017 @ 13:10 CDT
TweakTown Rating: 91%Manufacturer: ASUS

ASUS PRIME X299-DELUXE Circuit Analysis


The PRIME X299-DELUXE hides a lot under the shields.


The VCore or Input voltage is powered by a true 8 phase VRM. The VRM is made up of a relabeled Infineon (IR) IR35201, labeled ASP1405 working in 8+0 phase mode. Each phase consists of an IR3555, fully integrated 60A power stage. I am not sure of the inductor rating (I wish I knew), and the capacitors are 10K solid polymers.


Another ASP1405 seems to control two Texas Instruments CSD97374Q4M NexFETs, but these NexFETs have integrated drivers, just like the IR parts in the main CPU VRM. These phases control secondary and lower power rails such as VCCSA and VCCIO, so the NexFET's output of 15A efficient and 25A continuous is more than enough.


Two Digi+ ASP1103 PWM controllers control the memory VRMs; I am not sure what PWM it is as ASUS rebranded them. Each main phase (each set of four DIMMs gets two phases for the main DDR4 power rail) is made up of four low RDS ON MOSFETs and low profile inductors. They get the job done, as they are using the same components found on ASUS's Z270 overclocking motherboards.

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