Gigabyte GeForce GTX 1070 Ti Gaming 8G Review

Board & Power Supply

For its GeForce GTX 1070 Ti Gaming 8G, Gigabyte uses the second revision of a PCB we know from the GTX 1070 G1 Gaming. Interestingly, Gigabyte rotates this design's GPU by 90°, shifts the GPU voltage regulation circuitry to the left, and moves the memory to the right. As a result, there is no memory module between the VRM and GPU, or on the hot PCB traces. From a thermal perspective, Gigabyte's modifications make a lot of sense.

The company employs a uPI Semiconductor uP9511 6+2-phase buck controller for the GPU's six power phases.

The memory's two phases are controlled by a smaller OEM component that we don't have any information on. Each phase is realized using a highly integrated ON Semiconductor NTMFD4901NF, which combines high- and low-side MOSFETs, along with a Schottky diode.

Gigabyte places the BIOS, GPU PWM controller, and gate drivers for the GPU's VRMs to the back of the PCB. It also uses a thick thermal pad back there, which helps dissipate heat through the backplate.

GPU Power Supply

PWM Controller
uP9511
uPI Semiconductor
Eight-phase PWM controller

Gate Driver
58603A
Gate Driver
VRM High Side
AON6414
Alpha & Omega
N-channel MOSFET
VRM Low SideAON6508
Alpha & Omega
N-channel MOSFET

Coils
Magic Coils
Foxconn
Encapsulated ferrite chokes
15nH

Memory & Memory Power Supply

ModuleMT51J256M32HF-80
Micron
GDDR5, 8 Gb/s
8 Gigabit (32x 256Mb)
Eight Modules
PWM Controller
Two Phases
Buck Controller
OEM

VRM
NTMFD4901NF
ON Semiconductor
Dual N-channel MOSFET
High- and Low-Side

Coils
Magic Coils
Foxconn
Encapsulated ferrite chokes
22nH

Other Components

Monitoring
INA3221
Monitoring Chip
Currents, Voltages
BIOS
Winbond 25Q40
Kynix Semiconductor
EEPROM BIOS

RGB
Controller

HT32F52241
Holtek
32-bit ARM Cortex M0+
Input Range
Coil (smoothing) and shunt at eight-pin power connector

Other Features

Special Features
- 1x eight-pin auxiliary power connector
- Filter choke at entry
- ARM processor for RGB control

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