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GIGABYTE X99-Gaming 5P (Intel X99) Motherboard Review

By: Steven Bassiri | Socket LGA 2011 in Motherboards | Posted: May 13, 2015 2:16 pm
TweakTown Rating: 93%Manufacturer: GIGABYTE

Circuit Analysis

 

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The CPU VRM features a total of 6 phases; each is powered by an integrated power stage, the well-known International Rectifier PowIRstages. There are six high capacity server grade inductors made by Cooper Bussmann. The FP1007R3-R15-R are 0.15uH Flat-Pac series power inductors, they feature 76A saturation current at 25C, this is an extremely high current rating, and will help reduce overall heat around the VRM area. The X99-Gaming 5P uses 9x Nippon Chemicon 10K can-type polymer capacitors each rated at 560uF for a total of 5040uF.

 

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The X99-Gaming 5P is using the International Rectifier IR3580, an 8 phase digital PWM, the latest one that is offered by International Rectifier. GIGABYTE has used the IR3556 for the power stages; each one can output 50A at about 10W and 90% efficiency. The IR3556 is a brand new PowIRstage, it replaces the IR3551.

 

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There are two sets of everything for the DDR4 power on X99, this is because there are two sets of DIMMs on every X99 motherboard. GIGABYTE chose to stay with digital PWM control for all four DDR4 VRMs; the International Rectifier IR3570 is a 3+2 phase digital PWM perfect for this. Two of these PWMs are in use, one on each side of the board. There are four DDR4 VRMs because each set of DIMMs requires a DRAM voltage of 1.2v and a DRAM VPP voltage of 2.5v. The 1.2v rail is the most important, and on this board each set of DIMMs get two phases, each a 40A International Rectifier IR3553. The VPP is powered by a single phase that also uses the IR3553.

 

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Here is the second memory VRM and the VPP VRM is located below the DIMMs.

 

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A single RT8120 is a single phase PWM and it powers a single phase VRM using two Vishay SiRA14 and SiRA18 MOSFETs that control the PCH voltage rail.

 

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The main chip for the audio on the X99 Gaming 5P is the Core3Di chip from creative, the CA0132. It resides under the gold plated EMI shield. The entire audio section is separated from the main PCB where the analog and digital signals are mixed, this makes higher quality analog signals on the audio side easier to attain.

 

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GIGABYTE provides a replaceable operational amplifier; they call this system OP-AMP. The board comes with a Burr Brown (Texas Instruments audio subdivision) OPA2134, the CAP switch next to it reduces gain from 6x to 2.5x for both channels. A Texas Instruments TPS65130 provides up to +/- 15v for the OP-AMP socket. Dual ASM comparators help with the LED lighting modes. The X99 Gaming 5P also provides an amplifier for the front panel audio, the DRV632 from Texas Instruments provides that functionality. There are also 8x Nichicon audio capacitors of varying sizes.

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