What about the GTX 1080 Ti?
Published: 22nd July 2016 | Source: 17 chimps on a laptop |
What about the GTX 1080 Ti?
Nvidia's GTX Titan class GPUs always come with a huge price tag and the Pascal GTX Titan X is no different, costing $1200 in the US. GTX Titan series GPUs have never been about Value for money, but they always result in a lower end GTX variants like the GTX 780Ti or GTX 980Ti that provides gamers with relatively good value.
Today TinyTomLogan and I discussed the possibility of an upcoming GTX 1080 Ti GPU, what its specifications could be and where Nvidia plans on cutting down their Titan X for the consumer market.
Let's be clear that these are not leaked specifications, just an educated guess based on recent trends in the GPU market, especially when it comes to Nvidia's Titan class GPUs.
When looking at Nvidia's previous GTX Titan GPUs one trend is clear, that the lower priced Ti variant of every Titan GPU has half of the VRAM of its Titan equivalent. The GTX 780Ti had 3GB of VRAM compared to the 6GB on the Titan Black and the GTX 980Ti had 6GB compared to the Original GTX Titan X's 12GB.
Today's Titan has 12GB of GDDR5X VRAM and simply halving it would result in a GTX 1080 Ti that had 6GB of VRAM, something that Nvidia would simply not release given the fact that their GTX 1080 has 8GB of VRAM. With the GTX Titan series always having a VRAM capacity lead over their desktop counterparts we expect the GTX 1080Ti to have either 10GB of GDDR5X VRAM or potentially have 12GB (or less) or GDDR5 memory, both of which give the GTX Titan X a VRAM advantage in terms of speed and in the GDDR5X case capacity.
In order for the GTX 1080Ti to have less VRAM than the GTX Titan X but more than the 1080 Nvidia will need to use a smaller memory bus size, changing their 384-bit memory bus to a 320-bit memory bus, allowing Nvidia to use fewer VRAM chips and create a hypothetical 10GB GTX 1080Ti.
This decrease in memory bus size will also result in a decrease in overall memory bandwidth, lowering the total memory bandwidth from 480GB/s down to 400GB/s. A simple change from GDDR5X to GDDR5 would also decrease the GPUs total memory bandwidth from 480GB/s to 384GB/s without any changes to the memory bus.
On the GPU side, the Ti version of every Titan typically has less GPU/CUDA cores than its GTX Titan counterpart. In our Hypothetical GTX 1080Ti we think that Nvidia will give the GTX 1080Ti a core count that is in between the GTX 1080 and GTX Titan X.
Looking at the common trends when looking at the GTX 1060, 1070 and 1080 we can see that there 10 more active SM units every time you go up a GPU in the Pascal product stack, leaving us to suspect that the GTX 1080Ti would have a total of 50 SM units and a total of 3200 Pascal CUDA cores.
Below we have made a table showcasing our potential GTX 1080Ti specifications, which are based on usual Nvidia trends and our knowledge of the Pascal GPU architecture.
|GTX Titan X||Hypothetical GTX 1080Ti (GDDR5X)||Hypothetical GTX 1080TI (GDDR5)||GTX 1080||GTX 1070||GTX 1060|
|Cores per SM||64||64||64||64||64||64|
|SP FP Performance||11 TFLOPs||-||-||9 TFLOPs||6.5 TFLOPs||4.4TFLOPS|
|CUDA Core Count||3584||3328-2944||3328-2944||2560||1920||1280|
|Memory Bus Size||384-bit||320-bit||384-bit||256-bit||256-bit||192-bit|
|Memory Bandwidth||480 GB/s||400GB/s||384 GB/s||320 GB/s||256 GB/s||192 GB/s|
|Base clock speed||1417MHz||-||-||1607MHz||1506Mhz||1506MHz|
|Boost clock speed||1531MHz||-||-||1733MHz||1683MHz||1708MHz|
|Power Connection||1x 8-pin 1x 6-pin||1x 8-pin|
|PCI Express||PCIe 3.0||PCIe 3.0||PCIe 3.0||PCIe 3.0||PCIe 3.0||PCIe 3.0|
Right now all of this information is simple guesswork on our part, though it is based on some accurate knowledge regarding Nvidia's Pascal architecture.
Nvidia has not announced that a GTX 1080Ti is in development, but we do expect one to release in the future.