KFA2/Galax uses a modified GTX 1070 Hall of Fame board for the GTX 1070 Ti Hall of Fame, but with slightly improved assembly. This, in turn, is not a cost-down, but also takes into account objections from our previous reviews of similar HoF cards. The most visible change concerns the coils used, where the manufacturer now relies on better, encapsulated ferrite core coils. This will be heard later, or in this case, it is not.
On the right side we also see the small DIP switch for BIOS switching. We couldn't find out why the part is so hidden. Galax said on request that it was for internal use and was not currently needed. We'd rather assume that we could have switched to a different BIOS here and that the planning for this was already done before Nvidia's tough restrictions.
The GPU power supply is a true 8+3 phase, but doubler has been intentionally dispensed with. To achieve this, as with the GTX 1080 Ti Hall of Fame, an IR 3595A from International Rectifier is used, which, according to the graphics card manufacturer, offers more adjustment and access options. However, OpenVReg 4+ is also on board with this chip.
Due to the now larger coils, one deliberately dispenses with the phase doublers and controls the eight PowIRStage chip IR3555 directly. These highly integrated chips contain the two MOSFETs for the high and low sides, as well as a Schottky diode and the gate drivers.
The power supply of the memory is released via an uP9509 from uPI Semiconductor, which can provide the total of three phases as a buck controller. The control is applied by one MDU1514 on the high side and one MDU1511 on the low-side, both from MagnaChip.
The back is, except for some voltage converter MOSFETs for the peripherals, largely free of larger active components. The voltage converter range seems very tidy and one could have taken the opportunity to actively integrate the backplate into the cooling by means of a thermal pad. But it is enough, as we shall see in a while.
GPU Power Supply |
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PWM Controller | IR 3595A International Rectifier 8-Phase PWM Controller |
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Power Stage | IR 3595A International Rectifier High-, Low-Side VRM Schottky Diode Gate Driver |
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Coils | Encapsulated Ferrite Choke 22 nH |
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Memory and power supply |
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Modules | MT51J256M32HF-80 Micron GDDR5, 8.0 Gb/s 8 Gigabit (32x 256 MBit) eight modules |
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PWM Controller | uP9509 uPI Semiconductor 3-Phase Buck Controller |
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VRM High-Side |
MDU1514 MagnaChip Trench N-Channel MOSFET |
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VRM Low-Side | MDU1511 MagnaChip Trench N-Channel MOSFET |
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Coils | Encapsulated Ferrite Choke 22nH |
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Other components |
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Monitoring | INA3221 Monitoring Chip Currents, voltages |
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Shunts | Shunts (one each 8-pin connector) |
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Bios | 2x 25U4033E EEPROM BIOS Dual BIOS |
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Entrance Area |
Encapsulated Ferrite Choke Filter coils against voltage peaks 47nH |
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More details |
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Other Features |
– 2x 8-pin PCI-Express connectors for power supply – Filter coils in the entrance area – improved coil assembly – Real 8 phases for the GPU |
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