Turing Light: Nvidia GeForce GTX 1660 Ti Launch with the MSI GTX 1060 Ti Gaming X and the MSI GTX 1660 Ti Ventus XS

1 - Architektur, Testmuster, Testsystem 2 - Teardown und Analyse 3 - Benchmarks bei 1920 x 1080 (Übersicht) 4 - Benchmarks bei 1920 x 1080 (Einzelergebnisse) 5 - Benchmarks bei 2560 x 1440 (Übersicht) 6 - Benchmarks bei 2560 x 1440 (Einzelergebnisse) 7 - Leistungsaufnahme im Detail 8 - Temperatur, Takt, Infrarot 9 - Lüfter und Lautstärke 10 - Zusammenfassung

Board analysis in video and text

Since I now also run my own YouTube channel at many request, I have also made a detailed video for this card for Tear Down. The video below automatically jumps to the relevant location, where I analyze the board exactly.

The board relies on the Nvidia base layout PG161 and has 6 layers. The power supply, analogous to Nvidia's default, relies on a 4+2-phase design, with Nvidia optionally leaving up to 6 phases open to manufacturers. In our case, an NCP81610 is used for the 4 GPU phases and the two phases for memory. With only one FDPC5013SG per phase, the voltage converters rely on an asymmetrical dual-N-channel MOSFET, which combines high and low-side with Schottky diode. Separate gate drivers are searched here in vain.

MSI uses the proposed four phases and dispenses with two further optional phases. At a good 30 to 35 watts per phase, this assembly is quite useful. One of the four GPU phases is also powered by the 12V motherboard connector. It is interesting to monitor the board power to meet the power limits. One relies on an NCP45491 from On Semiconductor, which measures the voltage drop via the shunt (for determining the current) and can detect the voltages. In addition, MSI packs a fuse per rail and a coil for input filtering. Finished.

The following table contains the most important components:

GPU Power Supply
PWM Controller	NCP81610 ON Semiconductor 4 +2 Phases PWM Controller
Gate Driver	Integrated
Vrm	4x FDPC 5013SG ON Semiconductor Asymmetric Dual-N-Channel MOSFET
Coils	4x Ferrite Choke (Encapsulated Ferrite Core Coils)
Memory and power supply
Modules	6x MT61K256M32-12 Micron 1GB GDDR6 SGRAM modules 2 Channels x 256 Meg x 16 I/O 12Gb/s
PWM Controller	See GPU
Vrm	4x FDPC 5013SG ON Semiconductor Asymmetric Dual-N-Channel MOSFET
	Super Ferrite Choke (Encapsulated ferrite core coils)
Other components
Controller	8915FN Ite Integrated embedded controller
Eeprom	25Q80EW Winbond EEPROM, Single BIOS
Shunts	Coil (smoothing), shunt and fuse per 12V rail (2x)
Shunt Controller	NCP45491 ON Semiconductor Shunt Controller (Voltage/Current Monitor)
More details
Other Features	– 1x 8-pin PCI-Express connection to power supply – Filter coil and fuse in the input area

Cooler and backplate in detail

I recorded the complete dismantling in the video, again I put the label on exactly this section:

A large cooling frame permanently inflated by the two fans additionally stabilizes the board and provides cooling of the memory and voltage converters. The 11 screws attach the backplate with the threaded inserts. The entire cooler is held only by the 4 spring screws on the heatsink.

MSI relies on high-performance thermal pads for RAM and VRM, which are only 0.5 mm thick. Funny is the fact that you can also find a pad on the empty area, where two memory modules are missing. Since the GPU can only use 6 modules and the board is not RTX residual utilization, here you leave free RAM to the variability, where you put the RAM now – up or down. Depending on the radiator design, this can even make sense. Eight modules on a 192-bit interface would also be quite unworldly.

The lamella heat sink with its narrow, horizontally aligned cooling fins relies on a total of three nickel-plated 6 mm heatpipes made of copper composite material. These are flattened behind the heatsink and connected to it. A total of two 87 mm fans, each with 14 rotor blades in the 90 mm openings, ensure decent throughput and turbulence.

The brushed aluminium backplate does nothing for cooling and, like the assistant at the magician, has only one task: to look beautiful. The cooling system briefly summarized in a tabular overview: