Allgemein Gaming GPUs Hardware Reviews

Nvidia GeForce RTX 2080 and RTX 2080 Ti in review – Gaming, Turing benchmarks and new insights

The board of the little sister GeForce RTX 2080 looks a bit more tidy in comparison. The power supply is also much more conventional, because it is a design with real 8 (GPU) + 2 (memory) phases. This is not a witchcraft, but solved with the components used just as cleverly as with the GeForce RTX 2080 Ti. A total of six phases are fed from the external PCIe connectors, two from the motherboard slot remains the same that the PWM controller for memory is on top,…

… while the for the GPU is hiding back on the back. The positioning of the two phases for the memory can be seen again by the larger inductors of the two coils.  The back is a bit more tidy, but still looks very paved. You can also see that the socket of the GPU has been much smaller. The details of the components are immediately available.

Power supply of the GPU

The rather new uP9512 on the back is again used as an 8-phase PWM controller, which has been specially developed for the provision of high-precision output voltage systems for the latest generation of GPUs. The uP9512 has programmable output voltage and active voltage positioning functions to adjust the output voltage depending on the load current, so that it is optimally positioned for a good load current transition.

The uP9512 supports NVIDIA Open Voltage Regulator Type 4i+ with PWMVID function. The PWMVID input is buffered and filtered to create a very accurate reference voltage. The output voltage is then precisely controlled on the reference input. The integrated SMBus interface offers enough flexibility to optimize performance and efficiency and also to connect the appropriate software. The controller also supports new Smart Power Stage chips (PLCs). Appropriate PLC then provide very accurate information about e.g. currents (IMON) and temperatures (TMON).

An important feature is also the flexible hardware specification to adjust the operating phase number in different load current states. In addition, soft start to avoid peaks, channel current limitation, undervoltage protection, overvoltage protection and power good output. All 8 voltage converter circuits are equipped with the smaller FDMF 3160 from ON Semiconductor, a PowerTrench® MOSFET and equivalent to the original Fairchild, which is hardly documented.

In the case of coils, one again relies on the usual encapsulated ferrite core coils, which this time, however, are rectangular, in order to create more space for the high number of voltage converter circuits with the narrower sides in the vertical line-up of the coils.

Power supply of the memory

The label on the memory, as on the GeForce RTX 2080 Ti, identifies it as Micron's MT61K256M32. These are 8GB GDDR6 SGRAM modules (2 channels x 256 Meg x 16 I/O, 2 channels x 512 Meg x 8 I/O) with a bandwidth of 14Gb/s. Since a total of eight modules are installed, the memory expansion of 8 GB is also available.

The three phases of the voltage converters, like the GPU, are provided by an uP9512 in a three-phase layout. The three FDMF 3160s also use the same PLC. The coils are slightly larger at 470 mH in the inductance, but are completely identical in terms of external dimensions.

     

 

Other details

The input filtering is carried out via three 1-H coils, wherein there is a suitable shunt in each of the three connection lines. This is a very low-impedance resistance to which the voltage drop is measured in parallel and passed on to telemetry. Thus, the board power can be limited quite exactly to what the manufacturer as a frame for the total power consumption or specified the respective supply line. The Silver Pencil faction will surely shrug nervously.

The card has a single BIOS. It's a pity, but you can't have everything. Thus, we also search for the switch in vain. There is, logically, none.

 

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About the author

Igor Wallossek

Editor-in-chief and name-giver of igor'sLAB as the content successor of Tom's Hardware Germany, whose license was returned in June 2019 in order to better meet the qualitative demands of web content and challenges of new media such as YouTube with its own channel.

Computer nerd since 1983, audio freak since 1979 and pretty much open to anything with a plug or battery for over 50 years.

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