GeForce GTX 1080 Ti

The GeForce GTX 1080 Ti graphics card is based on the GP102 GPU, like the Titan X. The GP102 die, produced at the rate of 16 nm FinFET at TSMC, contains 12 billion transistors in an area of ​​471 mm2. The parameters of the next chip in the Pascal line, GP104, are much more modest - 7.2 billion transistors and 314 mm2.

However, the structure of the GP102 computing units repeats that of the GP104 chip, taking into account quantitative changes at the highest level of the architecture, so the entire additional transistor budget in the GP102 went to increase the speed in graphics and other calculations based on the FP32 data format. The single SM (Streaming Multiprocessor) in GP102 and GP104 contains 128 CUDA cores for FP32 operations, four FP64-compatible cores, and one core capable of executing two FP16 instructions simultaneously. In addition, the SM includes 40 texture mappers, 96KB of shared memory, and 48KB of L1 cache.

In total, the GP102 contains 30 SM blocks, which in total give a configuration of 3840 single precision CUDA cores and 240 texture units. The back-end of the pipeline is represented by twelve 32-bit GDDR5 / 5X memory controllers (384-bit bus), each of which is associated with 8 ROPs and a 256 KB L2 cache section (3072 KB for the entire GPU).

A special feature is the memory, which has an unusual amount of 11 GB. The reason lies in the reduction of the memory bus from 384 to 352 bits. One of the biggest innovations of the GeForce GTX 1080 Ti is the speedy GDDR5X memory. NVIDIA worked closely with memory manufacturer Micron to speed up the GDDR5X memory familiar from the GeForce GTX 1080. NVIDIA was able to improve signal quality and integrity, resulting in clock speeds from 1.250 MHz to 1.375 MHz.

But instead of the GP102 GPU's 384-bit memory interface, NVIDIA opted for a 352-bit interface for the GeForce GTX 1080 Ti. As a result, the memory bandwidth was 484 GB / s - even slightly faster than NVIDIA Titan X. The number of raster operation pipelines also decreased from 96 to 88 due to the reduction in the memory bus width.

Specifications GeForce GTX 1080 Ti

The base frequency of the GeForce GTX 1080 Ti Founders Edition is 1.480 MHz, the Boost frequency must be at least 1.582 MHz. But the real frequency depends on the temperature and can reach 1.900 MHz.

In the modern Pascal architecture, the memory interface is divided into 32-bit blocks. In the full version of the chip, the memory interface is 384-bit, but in the GeForce GTX 1080 Ti NVIDIA disabled one 32-bit block, as a result we get 352 bits. Each 32-bit block is responsible for connecting a memory chip. 352bit/32bit gives 11 channels or 11 GDDR5X memory chips.