Review Index:

GIGABYTE X99P-SLI Motherboard Review

Subject: Motherboards
Manufacturer: GIGABYTE

Introduction and Technical Specifications


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The X99P-SLI motherboard is the newest member of their Ultra Durable board line, updated with newest technological innovations including USB 3.1 and Thunderbolt 3. The board supports all Intel LGA2011-3 based processors paired with DDR4 memory in up to a quad channel configuration. GIGABYTE priced the X99P-SLI at an approachable MSRP of $249.99.

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Like all members of the Ultra-Durable board line, the X99P-SLI was over engineered to take whatever abuse is thrown its way, featuring an 6+4-phase digital power system with International Rectify Gen 4 digital PWM controllers and Gen 3 PowIRstage controllers, Server Level chokes, and long life Durable Black Solid capacitors. The board also features GIGABYTE's next generation PCIe x16 slots with PCIe Metal Shielding - steel reinforced overlays to provide extra vertical support for graphics cards featuring large and heavy coolers.

Continue reading our review of the GIGABYTE X99P-SLI motherboard!

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GIGABYTE integrated the following features into the X99P-SLI motherboard : eight SATA 3 ports; one SATA-Express port; one M.2 PCIe x4 capable port; four PCI-Express x16 slots; two PCI-Express x1 slots; an Intel I218-V GigE controller; CPU Mode switch; Display Port input port for integrated Thunderbolt 3 support; and USB 2.0, 3.0, and 3.1 Gen2 port support.

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Technical Specifications (taken from the GIGABYTE website)

CPU Support for Intel® Core™ i7 processors in the LGA2011-3 package
L3 cache varies with CPU

(Please refer "CPU Support List" for more information.)

Chipset Intel® X99 Express Chipset
Memory 8 x DDR4 DIMM sockets supporting up to 128 GB of system memory
* Due to a Windows 32-bit operating system limitation, when more than 4 GB of physical memory is installed, the actual memory size displayed will be less than the size of the physical memory installed.

4 channel memory architecture
Support for DDR4 3333(O.C.) / 3200(O.C.) / 3000(O.C.) / 2800(O.C.) / 2666(O.C.) / 2400(O.C.) / 2133 MHz memory modules
Support for non-ECC memory modules
Support for Extreme Memory Profile (XMP) memory modules
Support for RDIMM 1Rx8/2Rx8/1Rx4/2Rx4 memory modules (operate in non-ECC mode)

(Please refer "Memory Support List" for more information.)

Audio Realtek® ALC1150 codec
High Definition Audio
Support for S/PDIF Out
LAN Intel® GbE LAN chips (10/100/1000 Mbit)
Expansion Slots 2 x PCI Express x16 slots, running at x16 (PCIE_1/PCIE_2)
* For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIE_1 slot; if you are installing two PCI Express graphics cards, it is recommended that you install them in the PCIE_1 and PCIE_2 slots.

2 x PCI Express x16 slots, running at x8 (PCIE_3/PCIE_4)
* The PCIE_4 slot shares bandwidth with the PCIE_1 slot. When the PCIE_4 slot is populated, the PCIE_1 slot will operate at up to x8 mode.
* When an i7-5820K CPU is installed, the PCIE_2 slot operates at up to x8 mode.
(All of the PCI Express x16 slots conform to PCI Express 3.0 standard.)

2 x PCI Express x1 slots
(The PCI Express x1 slots conform to PCI Express 2.0 standard.)

Multi-Graphics Technology Support for 4-Way/3-Way/2-Way AMD CrossFire™/NVIDIA® SLI™ technology

* The 4-Way NVIDIA® SLI™ configuration is not supported when an i7-5820K CPU is installed. To set up a 3-Way SLI configuration, refer to "1-6 Setting up AMD CrossFire™/NVIDIA® SLI™ Configuration."

Storage Interface Chipset:
1 x M.2 connector (Socket 3, M key, type 2242/2260/2280 PCIe x4/x2/x1 SSD support)
1 x SATA Express connector
6 x SATA 6Gb/s connectors (SATA3 0~5)
Support for RAID 0, RAID 1, RAID 5, and RAID 10
* Only AHCI mode is supported when an M.2 PCIe SSD or a SATA Express device is installed.

4 x SATA 6Gb/s connectors (sSATA3 0~3), supporting IDE and AHCI modes only
(An operating system installed on the SATA3 0~5 ports cannot be used on the sSATA 0~3 ports.)

USB Chipset:
4 x USB 3.0/2.0 ports (available through the internal USB headers)
8 x USB 2.0/1.1 ports (4 ports on the back panel, 4 ports available through the internal USB headers)

Chipset+Renesas® USB 3.0 Hub:
3 x USB 3.0/2.0 ports on the back panel

Chipset+Intel® USB 3.1 Controller:
1 x USB Type-C™ port on the back panel, with USB 3.1 support
1 x USB 3.1 Type-A port (red) on the back panel

Internal I/O Connectors 1 x 24-pin ATX main power connector
1 x 8-pin ATX 12V power connector
1 x PCIe power connector
1 x M.2 Socket 3 connector
1 x SATA Express connector
10 x SATA 6Gb/s connectors
1 x CPU fan header
1 x water cooling fan header (CPU_OPT)
3 x system fan headers
1 x front panel header
1 x front panel audio header
1 x S/PDIF Out header
2 x USB 3.0/2.0 headers
2 x USB 2.0/1.1 headers
1 x Trusted Platform Module (TPM) header
1 x Clear CMOS jumper
Back Panel Connectors 1 x PS/2 keyboard/mouse port
1 x DisplayPort In port
1 x USB Type-C™ port, with USB 3.1 support
1 x USB 3.1 Type-A port (red)
3 x USB 3.0/2.0 ports
4 x USB 2.0/1.1 ports
1 x RJ-45 port
1 x optical S/PDIF Out connector
5 x audio jacks (Center/Subwoofer Speaker Out, Rear Speaker Out, Line In, Line Out, Mic In)
I/O Controller iTE® I/O Controller Chip
H/W Monitoring System voltage detection
CPU/System/Chipset temperature detection
CPU/CPU OPT/System fan speed detection
CPU/System/Chipset overheating warning
CPU/CPU OPT/System fan fail warning
CPU/CPU OPT/System fan speed control

* Whether the fan speed control function is supported will depend on the cooler you install.

BIOS 2 x 128 Mbit flash
Use of licensed AMI UEFI BIOS
Support for DualBIOS™
PnP 1.0a, DMI 2.7, WfM 2.0, SM BIOS 2.7, ACPI 5.0
Unique Features Support for APP Center
* Available applications in APP Center may differ by motherboard model. Supported functions of each application may also differ depending on motherboard specifications.
  • @BIOS
  • Ambient LED
  • EasyTune
  • EZ Setup
  • Fast Boot
  • Cloud Station
  • ON/OFF Charge
  • Smart TimeLock
  • Smart Recovery 2
  • System Information Viewer
  • USB Blocker
  • V-Tuner

Support for Q-Flash
Support for Smart Switch
Support for Xpress Install

Bundle Software Norton® Internet Security (OEM version)
Intel® Smart Response Technology
Operating System Support for Windows 10 / 8.1 64-bit
Support for Windows 7 32-bit / 64-bit

* Please download the "Windows USB Installation Tool" from GIGABYTE's website and install it before installing Windows 7.

Form Factor ATX Form Factor; 30.5cm x 24.4cm


Video News

May 20, 2016 | 02:58 PM - Posted by ZachDavis (not verified)

I picked up one of these boards a few weeks ago for a workstation I was building for the office. Very satisfied! Originally intended to use a X99 Sabertooth from ASUS but that board killed itself after setting the XMP profile.

X99P-SLI is great! I did notice however that the packaging apparently had been printed without mention of the Thunderbolt 3 or the 128GB RAM support (which we are taking advantage of). Call it a pleasant surprise.

May 20, 2016 | 06:51 PM - Posted by Anonymous (not verified)

That's pretty dumb, with their ultra high failure rates, combined with their bottom of the industry product support, their products have no business, in the workplace. Asus, Supermicro, or GTFO.

May 20, 2016 | 07:59 PM - Posted by Anonymous (not verified)

Do these new x99 boards feature DMI 3.0 like the z170 boards?

May 20, 2016 | 09:30 PM - Posted by Morry Teitelman

The current batch do not support DMI 3.0, not sure if refresh boards with Broadwell-E support will add it or not though...

May 21, 2016 | 10:18 AM - Posted by Anonymous (not verified)

How hard is it to make PCIE 3 16X so we dont need to sandwich cards

And yes i know 8x virtually no difference but in some cases it is.

May 21, 2016 | 02:23 PM - Posted by José Luís Ribeiro Lopes (not verified)

nop, we have no expansion cards that uses more than what a gen3 8x can provide

May 22, 2016 | 12:18 AM - Posted by Anonymous (not verified)

I don't get why there is a DisplayPort connector on the back when none of the LGA2011-3 CPUs have video.

I've been thinking about going to an X99 system for a few months now, but a majority of the customers reviews sound like they're too much trouble. BIOS failures, no M.2 boot support, USB hubs flaking out. I think at this point I'll wait for X290 and Skylake-E next summer.

May 22, 2016 | 07:04 AM - Posted by Pixy Misa (not verified)

The DP connector is an input, so that you can have video output over the Thunderbolt connector.

May 28, 2016 | 06:07 PM - Posted by Anonymous (not verified)

That's cool. I have high hopes for Thunderbolt 3 after reading all its specifications. Time will tell if it becomes a success in the hands of manufacturers and consumers.

May 23, 2016 | 01:33 AM - Posted by Tyrael2b

Dear Readers of the PCper forums

I dont know if it is the wright stanec by PCper not to validat the clames by gigabyte! Taking there clames on fath, dose not inform! PCper we need real evidence that the PCIe port is actually as strong as the clames layed out in your artical.

I propose a scientific approch, namely the use of a single mesurement of "Josh Walrath" Until such time as the single unit of measurement has been used i call that the clames be revoked!

Yours sinisterly,
In the name of Science, Truth, Justice

May 26, 2016 | 12:03 PM - Posted by Brett M. (not verified)

Not sure what is more lacking;your poor syntax or your worse spelling?

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