The Guru of 3D published a review on the MSI GeForce GTX 1070 Gaming X
A quote from the article:
In this review we look at the MSI GeForce GTX 1070 GAMING X 8G fitted with a Pascal GP104 based GPU. A product series that is to replace the GeForce GTX 980. It's all custom with 10 power phases, has a nice dark aesthetic feel and comes with the all new TwinFrozr VI model cooler, that is marketed as a cooler with Balls of Steel. Seriously I am not making that up, it literally was in the press release and actually refers towards the Double Ball Bearings that the fans use -- made out of steel. The GeForce GTX 1070 is all about that Pascal GP104 GPU, yet for obvious reasons had to be slowed down a bit. The GeForce GTX 1070 might have the same GP104 GPU housed on it's PCB as the 1080, however it is a cut-down version of the GPU as Nvidia stripped away some segments. Where the GeForce GTX 1080 has 2560 shader processors, the GeForce GTX 1070 has 1920 shader processors. This means it is has 15 out of the 20 SMs active (15 streaming multi-processors x 128 shader cores). In order of magnitude, the secondary biggest change is the memory type being "regular GDDR5" memory and not the new and hip GDDR5X. That memory is clocked at 2,000 MHz which is 8 GHz (GDDR5-effective) at a memory bandwidth of 256 GB/s. The two differences are responsible for a performance drop from 9 TFLOP/s Single-precision floating point performance for the GeForce GTX 1080 towards 6.45 TFLOP/s for the GeForce GTX 1070. You will have noticed that MSI is to release a regular Gaming and then an X and a Gaming Z model. The regular Gaming model (no X or Z) will not have the backplate and configurable RGB LED light system and basic clock frequencies. Then there are the X models, these are released in the initial launch and come with a backplate and RGB system and are clocked a notch higher. Then the Z models will be the most high-end SKU, even more overclocked with all the benefits the X model has as well. So we test the X model, but there will be even faster clocked revisions. The Gaming Z gives you all the features of the Gaming X, but with higher clock speeds. Right with that explained, the cooling perf has been improved and combined with a new generation fans, the airflow is improved whilst remaining silent. Up-to 60 Degrees C the card will even stay in passive mode, e.g. the fans will not spin. The TWIN FROZR cooler is now intensified by a red GAMING glow piercing through the cover, while the MSI GAMING dragon RGB LED on the side can be set to any of 16.8 million colors to match the LED lights in the color-tone of your PC. The GTX 1070 GAMING X 8G comes with MSI's traditional Military Class 4 components and holds both an 8- and 6-pin power connector. At the backside you'll spot a nice matte black solid backplate. Both versions do have TwinFrozer VI as wel as a memory cooling plate and a PWM heatsink.MSI GeForce GTX 1070 Gaming X Review @ Guru3D