Board & Power Supply
MSI uses its own design for this board, and that implementation is much different from what the company did for its GeForce GTX 1080 Ti Lightning X card.
Behind a trio of eight-pin auxiliary power connectors, the board has three chokes to smooth out spikes in the electrical input, along with a shunt.
The GeForce GTX 1080 Ti Lightning Z employs a 7+3-phase power supply with doubling. Thus, each phase is able to distribute the load between two parallel 180°-shifted control circuits. You can see the memory's three phases over there on the PCB's right side.
MSI keeps the back of its card tidy-looking. It's home to the memory's PWM controller and a number of other components.
| GPU Power Supply | ||
|---|---|---|
| PWM Controller | IR3595AInternational RectifierEight-phase single or 6+2 dual-loop configurableSeven phases in use (doubled) | |
PWM DoublerIR3599International RectifierPhase multiplierDrives two power stages 180° out of phase
VRMIR3555MInternational Rectifier 60A PowIRstage Includes high- and low-side MOSFETsIncludes Schottky diode
CoilsFerrite core coils Lianzhen Electronics
Memory & Memory Power SupplyModuleMT58K256M321JA-110 Micron 11 x 1GB GDDRX5 11 Gb/s1391 MHz
PWM ControllerIR3570BInternational Rectifier3+2-phase PWM controller
Gate DriverCHL8510Infineon
VRMQM3816N6UBIQDual N-channel trench MOSFETsIncludes high- and low-side MOSFETs
CoilsFerrite core coils Lianzhen Electronics
Other ComponentsMonitoringINA3221Texas InstrumentsHigh-side current and bus voltage monitor
NCT7511YNuvotonTemperature and fan speed monitor
Fan Control8295FNITE
Shunts1x coil (smoothing) and shunt per PCIe connector (12V input voltage)
BIOSWinbond 25Q40Kynix SemiconductorEEPROMDual-BIOS (via switch)
Further DetailsOther Highlights(3) Eight-pin auxiliary power connectorsFilter coils for power inputVoltages and other sensor output
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