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post #1 of 145 (permalink) Old 10-12-2014, 03:16 PM - Thread Starter
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There doesn't seem to be an X99 VRM discussion thread yet, so I guess now may be a good time to start one:

(This is just a draft and I will need to make greater details later on including pictures) Ocaholic has some extensive pictures, as do a few other sites.

Most motherboards are using 8x IR3550.


Also, I will update - Sin0822 has been doing reviews on Tweaktown and has begun using a thermal camera to test out the VRM temperatures on motherboards:
http://www.tweaktown.com/author/Steven-Bassiri/index.html


Thanks to
AlphaC for multiple motherboard contributions
Sin0822, likewise for multiple contributions, particularly with Gigabyte's motherboards

Astr627 for image on MSI X99 Krait

Motherboard makers (in alphabetical order):
Asrock
Asrock has been marketing their Mosfets as "dual stack". Not entirely sure what that means.

For Z97, that meant they used NextFET D87350s, but I think they may have swapped over to Fairchild Semi.

They are using 60A Blackwing chokes, which might be overkill for what Mosfets are being used. Unlike other manufacturers, their boards seem to come with Nichicon 12K Platinum Caps standard versus most others using 10k.

ASRock Fatal1ty X99M
Mosfets: 12x FDMS3660S (see: https://www.fairchildsemi.com/products/discretes/fets/mosfets/FDMS3660S.html)
Controller: ISL6379 Hybrid Digital/Analog
Choke?

X99 WS
Mosfets: 24x D87350? Edit: These might be Fairchild Semi?
Choke: 60A Blackwing
Controller: ISL6379 Hybrid Digital/Analog
Warning: Spoiler! (Click to show)
Mosfets:

Hybrid Controller ISL6379:



X99 OC Formula
Mosfets: 12x FDMS3660S https://www.fairchildsemi.com/datasheets/FD/FDMS3660S.pdf
Choke: 60A Blackwing
Controller: ISL6379 Hybrid Digital/Analog

X99 Extreme 11
Mosfets: 12x FDMS3660S https://www.fairchildsemi.com/datasheets/FD/FDMS3660S.pdf
Choke: 60A Blackwing
Controller: ISL6379 Hybrid Digital/Analog

Comes with 2x PLX 8747, so should have 72 lanes in total.


Asus
Most motherboards seem to center on 8x IR3550. They have paired them with 60A Blackwing chokes, which considering the current of the Mosfet works quite well.

They are using a custom Digi+ Controller? Suspect it could be an IR3580, but need to verify. They all seem to come with an ASUS DIGI+ ASP1257.




X99-A/B]
Mosfets: 8x ON Semiconductor NTMFD4C85N
Choke: ?
Controller: ASUS DIGI+ ASP1257


X99-Deluxe
Mosfets: 8x IR3550
Chokes: 60A Blackwing chokes
Controller: ASUS DIGI+ ASP1257
Warning: Spoiler! (Click to show)
Shot of the VRMs:


http://www.kitguru.net/components/motherboard/luke-hill/asus-x99-deluxe-motherboard-review/3/
Quote:
Originally Posted by Kitguru 
Asus uses eight power phases to feed the CPU and a further four to provide for the eight DIMM slots. The CPU power system is controlled by a Digi+ ‘EPU’ ASP1257 digital controller, while a Digi+ ASP1250 chip manages the DRAM power. International Rectifiers PowIRstage IR3553M MOSFETs drive up to 40A of current through each power phase with a peak efficiency (quoted by International Rectifiers) of 93.2%.

This seems to be a typo, as the board clearly has IR3550M.

Rampage V Extreme
Mosfets: 8x IR3555
Controller: Digi+ EPU?
Not too sure about these chokes.
Warning: Spoiler! (Click to show)
VRMs & Choke


Controller?


X99 WS-E
Mosfets: 8x IR3550
Controller: ?
Chokes: 60A Blackwing Chokes

Unique to this board is the 2x PLX 8747, which should allow 72 lanes in total (only the Extreme 11 has this as well). They are also using 12K caps, while most boards get 10k.
Warning: Spoiler! (Click to show)
VRM Shots (Credit to Canis-X):



X99-Pro
Mosfets: OnSemi 4C85N (http://www.onsemi.com/pub/Collateral/NTMFD4C85N-D.PDF)
Chokes: ?
Controller ? Likely same Asus Digi+ version

http://www.ocdrift.com/review-asus-x99-pro/




Sabertooth
The power configuration is the same as their lower end counterparts.

Mosfets: 8x ON Semiconductor NTMFD4C85N and underneath is 8x IR3535M floating N-channel MOSFET drivers.
Choke: ? R15A 1501 is the marking and Asus advertises them as "TUF Chokes", although that does not help us
Controller: ASUS DIGI+ ASP1257

Warning: Spoiler! (Click to show)
From KitGuru:
Top side


8x IR3535M on bottom


RAM Mosfet:




EVGA
X99 Classified
Mosfets: 10x IR3550
Controller: IR3563B
Chokes?

RAM is being driven by 4x IR3553M.
Warning: Spoiler! (Click to show)
10x IR3550M Mosfets


Controller:



Gigabyte
Most motherboards seem to be 8x IR3556. They are paired with 60A chokes, so it's a solid fit.

Please see the following:
http://www.tweaktown.com/guides/6765/gigabyte-ga-x99-soc-force-motherboard-overview-and-overclocking-guide/index2.html

X99 SOC Force
Mosfets: 8x IR3556M (http://www.irf.com/product-info/datasheets/data/pb-ir3556.pdf)
Controller: IR3580 for CPU; IR3570A for RAM?
Chokes: 76A Cooper Bussmann R15-1007R3 (see the following: http://www1.cooperbussmann.com/pdf/79793630-1b1e-49f8-a6d0-ea9b2be9f2e4.pdf)

There are 4x IR3553M for the RAM. Warning: Spoiler! (Click to show)

Mosfets:



Controller:



RAM Mosfets


X99-UD7
Mosfets: 8x IR3556M
Controller: IR3580
Chokes?

MSI
X99S XPower
Mosfets: 12x FDMF5823DC (rated at 55A) (https://www.fairchildsemi.com/datasheets/FD/FDMF5823DC.pdf)
Chokes: 12x 45A "SFC" chokes
Controller: ISL6388, which I think is hybrid?

X99S MPower - looks identical to XPower?
Mosfets: 12x FDMF5823DC (rated at 55A) (https://www.fairchildsemi.com/datasheets/FD/FDMF5823DC.pdf)
Chokes: 12x 45A "SFC" chokes
Controller: ISL6388, which I think is hybrid?
Warning: Spoiler! (Click to show)

Scroll to post 27:
http://hardforum.com/showthread.php?s=0a1125fdf8dde407acc7c861b7335bf7&t=1831337&page=2

MPower and XPower appear to have the same VRM design.

X99S SLI Krait - looks identical to XPower and MPower?

X99S SLI PLus
Mosfets: 8x OnSemi 4C08N , 4c05N (possibly 16?)
Controller: ISL6388

For RAM 2x IR3553M managed by an ASP1250
Warning: Spoiler! (Click to show)
Top



Overview






I believe that the Gaming 9 and Gaming 7 also share this VRM design.


Other thoughts
Will update this thread later on.

Am surprised though at the use of hybrid controllers still.

I'd be shocked though to see anything like D-Paks on X99 motherboards, even for the lower end mid-$200 USD boards.
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post #2 of 145 (permalink) Old 10-12-2014, 04:42 PM
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My lazy recopy over from
https://www.overclock.net/t/1510026/x99-motherboard-roundup/70#post_22991091
ASUS x99 Rampage V Extreme (Click to show)
http://www.ocaholic.ch/modules/smartsection/item.php?itemid=1434&page=3
Quote:
This is basically the first point where things are starting to become really interesting. A first glance at the power design reveals that ASUS once again swapped the chokes and with the Rampage V Extreme you get so called MicroFine chockes. Apart from that there are mosfets from International Rectifier, which include low- and high-side. ASUS did not touch the 10K black solid caps, which apparently appear to be of sufficient quality even for ASUS's highest-end motherboard. In the case of the PWM controller chip there ASUS is using their own design, which they call Digi+. Overall the maker is keen on pointing out that a high-end power design is not simply about adding more phases, what's more important is the quality of the parts used as well as being able to provide a fully integrated solution.
ASUS x99 deluxe (Click to show)
http://www.ocaholic.ch/modules/xcgal/thumbnails.php?album=3651&page=6 , http://www.ocaholic.ch/modules/smartsection/item.php?itemid=1423&page=3
Quote:
The ASUS X99 Deluxe comes with a digital 8+4 phase power design. The CPU gets eight phases and the memory gets a stable current supply from four individual phases. Furthermore ASUS equips this board with their so called "BlackWing Chokes". Apart from that these chokes can cope with up to 60A per phase. A closer look at the capacitors reveals there are 10K Black Metallic Caps, which have an average life span of 10'000 hours.
http://www.hardwaresecrets.com/article/ASUS-X99-DELUXE-Motherboard/1877/6
Quote:
The CPU voltage regulator circuit of the ASUS X99-DELUXE has eight phases for the CPU. The voltage regulator is controlled by an ASUS DIGI+ ASP1257 chip, using a digital design. Each phase is controlled by one IR3550M integrated circuit.
http://www.kitguru.net/components/motherboard/luke-hill/asus-x99-deluxe-motherboard-review/3/
Quote:
The CPU power system is controlled by a Digi+ ‘EPU’ ASP1257 digital controller, while a Digi+ ASP1250 chip manages the DRAM power. International Rectifiers PowIRstage IR3553M MOSFETs drive up to 40A of current through each power phase with a peak efficiency (quoted by International Rectifiers) of 93.2%.
ASUS X99-A (Click to show) ASRock x99 WS (Click to show)
http://www.ocaholic.ch/modules/xcgal/thumbnails.php?album=3652&page=5 , http://www.ocaholic.ch/modules/smartsection/item.php?itemid=1424&page=3
Quote:
The ASRock X99 WS comes with a digital 12+4 phase power design, whereas the CPU is backed up by twelve phases and the memory by four. Like we've already explained on the features page ASRock is making use of an extensive solution. There are for instance Dual-Stack MOSFETs, NexFET MOSFETs as well as 12K Platinum caps on this motherboard. The Dual-Stack MOSFETs are taking care of stable and efficient current delivery to the CPU and compared to standard MOSFETs the offer a significantly lower RDS(on) value of just 1.2 milliohm. The memory gets backed-up by NexFET MOSFETs, which also offer a very low ROD(on) value of 2.9 milliohm. Last but definitely not least there 12K Platinum Caps that are good for no less than 12'000 hours of on time.
Asrock Extreme6 (Click to show) Asrock X99 OC formula (Click to show)
http://www.kitguru.net/components/motherboard/luke-hill/asrock-x99-oc-formula-motherboard-review/3/
Quote:
A twelve phase power delivery system feeds the LGA2011-3 CPU. ASRock suggests that the system can deliver up to 1300W of power, translating into an impressive 108W per physical electronic phase.

Looking more specifically at the components, ASRock opts for a 6-phase Intersil ISL6379 PWM controller to provide the overall VRM management. Six Intersil ISL6611A phase-doublers each take a single PWM input lane from the ISL6379 and convert it to two PWM output lanes. This allows ASRock to control up to twelve power delivery phases for the CPU.

Finding information for the ISL6379 PWM chip is very difficult, although numerous sources suggest that it is a ‘hybrid’ analog/digital controller. If that is indeed the case, it’s the analog section of the controller that is to thank for ASRock’s rapid voltage switching frequency which leads to positive power consumption numbers under static loads (as we will outline later). However, some of the enhanced accuracy and future-looking voltage level projection may be missing compared to a purely digital component.

Twelve unmarked chokes, each of which ASRock rates for a 60A output, are joined by 24 Fairchild FDMS3660S dual N-channel MOSFETs. The front dozen MOSFETs are electronically linked in parallel with the rear dozen, allowing the twelve available PWM channels to provide overall control for every transistor. The X99 OC Formula features roughly $22 worth of MOSFETs just for the CPU (although the OEM probably pays less by bulk ordering).

I’m actually quite surprised to see ASRock opting for the Fairchild MOSEFTs when some of its previous OC Formula parts used Texas Instruments’ NexFET solutions, which are widely believed to compete with International Rectifiers’ IR355x PowIRStage alternatives for the MOSFET crown. The move would imply that ASRock has strong confidence in the Fairchild components, but performance numbers from extreme overclockers will provide the best comparison data.

ASRock also uses Nichicon ‘Platinum’ capacitors, rated for 12,000 operating hours at 105°C, for power delivery functions. Scale that running temperature down to a realistic operating value and it translates into a very long operational lifespan for each capacitor.

bare VRM 2 300x182 ASRock X99 OC Formula Motherboard Review VRM rear memory 2 300x182 ASRock X99 OC Formula Motherboard Review

Two more ISL6379 PWM controllers manage the X99 OC Formula’s 4-phase memory power delivery system. ASRock uses ‘Premium Memory Alloy Chokes‘ which are suggested to deliver their current with reduced temperatures.

The Conformal Coating makes it difficult to read what is written on the electronic components, although I did notice Sinopower SM4337 MOSFETs in the memory’s vicinity. There is also a pair of Richtek RT9045 regulators which (presumably) work with DDR voltage applications.
ASRock Fatal1ty X99M Killer (Click to show)
http://www.hardwaresecrets.com/article/ASRock-Fatal1ty-X99M-Killer-Motherboard/1878/6
Quote:
The CPU voltage regulator circuit of the ASRock Fatal1ty X99M Killer has 12 phases for the CPU. The voltage regulator is controlled by an Intersil ISL6379 chip, using a digital design. Each phase uses one FDMS3660S (“22CF 07OD”) integrated circuit, which contains both the “high-side” and the “low-side” MOSFETs.
EVGA X99 Classified (Click to show)
http://www.ocaholic.ch/modules/xcgal/thumbnails.php?album=3654&page=4 , http://www.ocaholic.ch/modules/smartsection/item.php?itemid=1426&page=3
Quote:
EVGA equipped the X99 Classified with a 10+4 phase digital power design with an IR3563B Chip from International Rectifier taking care of the CPU VRM. Furthermore you will find 100 percent Japan made high quality capacitors so that's a pretty strong power design.
The memory gets one digital phases per channel (4 DIMMs), which are also driven by chips from International Rectifier. In this case there are IR3570B chips. This gives you 4 phases in total for the memory.
http://www.overclockers.com/evga-x99-classified-motherboard-review
Quote:
With the heatsinks out of the way, we can see the 10-phase power design EVGA used for the X99 Classified. Voltage regulation is handled by the International Rectifier 3563B controller. All the other voltage controllers and MOSFETs found on the motherboard are also International Rectifier products.
Gigabyte X99 SOC force (Click to show)
http://www.ocaholic.ch/modules/xcgal/thumbnails.php?album=3658&page=5 , http://www.ocaholic.ch/modules/smartsection/item.php?itemid=1444&page=3
Quote:
Gigabyte equipped the X99 SOC Force with a digital 8+4 phase power design. There is a total of eight phases to stably supply the CPU with power and there are chips from International Rectifier controling the signals. In the case of the DIMM slots there are four more phases which are also controlled by chips from International Rectifier.
Gigabyte X99 UD4 (Click to show)
http://www.ocaholic.ch/modules/xcgal/thumbnails.php?album=3660&page=4 , http://www.ocaholic.ch/modules/smartsection/item.php?itemid=1428&page=3
Quote:
Gigabyte equipped the X99-UD with a digital 6+4 phase power design. There is a total of six phases to stably supply the CPU with power and there are Chips from International Rectifier controling the signals. In the case of the DIMM slots there are four more phases which are also controlled by chips from International Rectifier.
MSI X99S Mpower (Click to show) MSI x99S SLI PLUS (Click to show)
Other known boards with unknown VRM:
* ASRock X99M Extreme4 , ASRock X99 Extreme3 (6 phase?), ASRock X99 Extreme4 (12 phase?), ASRock Fatal1ty X99M Killer , ASRock X99 Professional , X99 Extreme11
* Asus X99-E WS , ASRock X99 WS, ASUS X99-Pro
* EVGA x99 Micro , EVGA x99 FTW
* Gigabyte GA-X99-UD3 , Gigabyte GA-X99-GAMING 5 , Gigabyte GA-X99-UD5 WIFI , GIGABYTE X99-UD7 WiFi, Gigabyte GA-X99-GAMING G1WIFI
* MSI X99S Gaming 7 , MSI X99S XPOWER AC , MSI X99S GAMING 9 AC

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post #3 of 145 (permalink) Old 10-18-2014, 07:15 PM - Thread Starter
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Thanks for that. +Rep

I've made a partial update to all of the VRMs. It's looking like this round, all the higher end boards are seeing a level of standardization we have not seen in the past, with most going to either IR3550 or Fairchild.
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post #4 of 145 (permalink) Old 10-19-2014, 04:54 AM
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post #5 of 145 (permalink) Old 10-19-2014, 05:26 AM
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well done,This is good thread... I will need X99 motherboard for New Year Holidays.thank youIRgcrh
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post #6 of 145 (permalink) Old 10-22-2014, 01:43 PM
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The issue with ISL / analog "hybrid" controllers is (voltage) overshoot and or have v_droop (a voltage drop from load). When you don't have a digital feedback loop then it's very easy to overshoot the voltage if the load changes.

The reason the analog stuff is used is because analog controllers tend to be faster.

http://sinhardware.com/index.php/vrm-articles/113-digital-vs-analog-pwms/74-analog-vs-digital-pwms

The reason you see more 8+ phase designs for the X99 platform is A. cost , B. CPU TDP is higher so even non-overclocked builds will need more robust power delivery components.

If you look at the ISL6388 data sheet (the controller on the MSI board) , the PWM only has 6 phases but with "Phase doubler and coupled-inductor compatibility". So essentially the waveform is only 6 phases but you are using two mosfets turned on for each phase instead of one.

http://www.intersil.com/en/products/power-management/computing-power-vrm-imvp/multiphase-controllers/ISL6388.html

It's the same thing for the AsRock's PWM:
http://www.intersil.com/en/products/power-management/computing-power-vrm-imvp/multiphase-controllers/ISL6367.html


----


On topic:

Asrock X99X Killer http://www.hardwareluxx.de/index.php/artikel/hardware/mainboards/32468-asrock-x99x-killer-im-test.html?start=1 ASUS X99-Pro (Click to show)
www.ocdrift.com/review-asus-x99-pro/

To ensure reliability and stability during overclocking, ASUS has decided to use eight high quality rectifiers labeled 4C85N to convert alternating current (AC) to direct current (DC) power.

*** http://www.onsemi.com/pub/Collateral/NTMFD4C85N-D.PDF


Asrock X99 OC Formula (Confirmation) http://www.ocaholic.ch/modules/xcgal/thumbnails.php?album=3709&page=5
ASUS X99 Deluxe (confirmation) http://www.techbang.com/posts/19882-asus-x99-deluxe-feature-the-flagship-in-depth-analysis
Gigabyte X99 SOC Force (confirmation) http://www.tweaktown.com/guides/6765/gigabyte-ga-x99-soc-force-motherboard-overview-and-overclocking-guide/index2.html

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post #7 of 145 (permalink) Old 10-24-2014, 08:20 AM
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some of the most recently hybrid analog/digital stuff should be good and able to compete since the VRM is still integrated.

The GBT X99 all use IR3556
Also IR3580 on the SOC Force

The ASROck OC Formula uses the fairchild 2 in 1s


Each board has four VRMs for the memory. There are two memory VRMs per each side of the board. One of the VRMs for each set of DIMMs controls the dram voltage, the 1.2v voltage. The other VRM controls the DDR VPP supply for each set of DIMMs, which is at 2.5v. So many manufacturers are using dual output PWMs for memory, one for each set of DIMM, so they can power 2 VRMs with a single PWM, like the IR3570 on the SOC Force.

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post #8 of 145 (permalink) Old 10-24-2014, 08:56 AM
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Quote:
Originally Posted by Sin0822 View Post

some of the most recently hybrid analog/digital stuff should be good and able to compete since the VRM is still integrated.

The GBT X99 all use IR3556
Also IR3580 on the SOC Force

The ASROck OC Formula uses the fairchild 2 in 1s


Each board has four VRMs for the memory. There are two memory VRMs per each side of the board. One of the VRMs for each set of DIMMs controls the dram voltage, the 1.2v voltage. The other VRM controls the DDR VPP supply for each set of DIMMs, which is at 2.5v. So many manufacturers are using dual output PWMs for memory, one for each set of DIMM, so they can power 2 VRMs with a single PWM, like the IR3570 on the SOC Force.

Thanks for making an appearance thumb.gif
Gigabyte UD4 seems to be 6+4 according to some sites but I think UD5 is the same?.

Is it the "Dual stack mosfet" marketing gimmick or TI NexFET style implementations where high+low side are together (on the Asrock x99 OC Formula and microatx OC Formula)?

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post #9 of 145 (permalink) Old 10-24-2014, 09:02 AM
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its ASRock's way of saying two in one MOSFETs, so the high and low side are in one package. It is like a DrMOS or IR powerstage but without a driver.

The GBT are either 6 or 8 on the CPU VRM, and memory either 4 or 6 total

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post #10 of 145 (permalink) Old 10-24-2014, 10:25 AM
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How is asrock boards
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