Tech content trusted by users in North America and around the world
7,217 Reviews & Articles | 52,114 News Posts

ASRock X99 OC Formula/3.1 (Intel X99) Motherboard Review

By: Steven Bassiri | Socket LGA 2011 in Motherboards | Posted: Jul 6, 2015 8:13 pm
TweakTown Rating: 92%Manufacturer: ASRock

Circuit Analysis

 

asrock-x99-oc-formula-3-1-intel-motherboard-review

 

asrock-x99-oc-formula-3-1-intel-motherboard-reviewasrock-x99-oc-formula-3-1-intel-motherboard-review

 

The VRM on this board consists of 12 phases, but ASRock has further enhanced the power output of the X99 OC Formula/3.1 by doubling up on the normal number of MOSFETs they use for their 12 phase/1300W VRM. ASRock has focused on power density by utilizing lower profile 60A inductors and more integrated phases. The output filter is made up of 8x 560uF solid 12K Nichicon capacitors at 4480uF.

 

asrock-x99-oc-formula-3-1-intel-motherboard-reviewasrock-x99-oc-formula-3-1-intel-motherboard-review

 

 

The PWM controller is an Intersil ISL6379 Digitally Controlled Hybrid 6 phase PWM. There is no datasheet, but I would venture to guess that it is a 6+1 phase PWM. To get 12 phases, manufacturers must double the phase count from the PWM since there is no 12 phase PWM in production for motherboards. ASRock uses 6x Intersil ISL6611A which are phase doublers with integrated dual drivers located on the backside of the motherboard.

 

This saves a lot of space which is important considering the limited motherboard real-estate of the X99 platform. ASRock is using 24x FDMS3668S which are dual N-Channel MOSFETs from Fairchild Semiconductor in the PowerTrench package. They have very good thermal and current ratings at 13A/18A (high/low side) at only 2.5W, which is excellent.

 

asrock-x99-oc-formula-3-1-intel-motherboard-review

 

Each memory VRM is like a two phase version of the CPU VRM, using the same ISL6379 PWM and the same dual N-Channel PowerTrench MOSFETs for a total of three ISL6379 and 16 dual MOSFETs on the board. This is just one of two identical memory VRMs on this board.

 

asrock-x99-oc-formula-3-1-intel-motherboard-reviewasrock-x99-oc-formula-3-1-intel-motherboard-review

 

An MPS MPQ8632 is used for the VPP power for each set of the 4 DIMMs. The memory DIMM's main MOSFETs need drivers and four tiny ones are found on the back of the board. The drivers are Intersil ISL6208.

    PRICING: You can find products similar to this one for sale below.


    United States: Find other tech and computer products like this over at Amazon's website.

    United Kingdom: Find other tech and computer products like this over at Amazon UK's website.

    Canada: Find other tech and computer products like this over at Amazon Canada's website.

    We at TweakTown openly invite the companies who provide us with review samples / who are mentioned or discussed to express their opinion of our content. If any company representative wishes to respond, we will publish the response here.

Related Tags

Got an opinion on this content? Post a comment below!
Subscribe to our Newsletter

Latest News Posts

View More News Posts
View Our Latest Videos

Forum Activity

View More Forum Posts

Press Releases

View More Press Releases
loading