The latest MSI Titan SLI is deeply impressive. However, it is clear the dual GTX 1080 GPUs have pushed the air cooling system to its limits. While the coolers have little trouble keeping the hardware below 90 degrees they can only do this by spinning the turbines at quite a rate and the consequence is noise. Lots of noise. As a portable solution, the Titan makes better sense than Asus GX800VH. But even so, it is big and heavy and you need to lug two large power bricks wherever you go.