Gigabyte announced their ITX sized GTX 1080 back in early september. It finally made it to Newegg this week and I picked up the card.
A lot of companies offer smaller GPU's but Gigabyte seems to be a leader in releasing true ITX sized cards. These cards are designed to be under 6.7" long. This allows the card to sit on an ITX board and not extend beyond the end of the motherboards's PCB.
Looking at the cards side by side reveals that they are almost identical. The GTX 1080 is on the left and the 1070 is on the right. Please excuse the mess. I'm rebuilding my workbench right now and I had to move everything onto a folding table.
Both cards use a single 8-pin PCIE power connector. The coolers and fans are identidal on both cards. The PCB is almost identical as well.
The GTX 1070 ITX/Mini has a base clock of 1556 MHz and boost of 1746 MHz. This is about +50 Mhz on both core/boost clocks over a reference 1070.
The GTX 1080 ITX/Mini has a base clock of 1632 MHz and boost of 1771 MHz. This is still above reference but a smaller overclock than the 1070. We see +25 Mhz on the core and +38 MHz on the boost.
I'm installing the Gigabyte GTX 1080 ITX/Mini in the Small Form Factor ITX case that I've been working on for the last few months. This case is very small and gives us a good idea as to how the GPU will perform in an SFF case.
As you can see, the GPU has only about half an inch of clearance above the SSD drives. While this looks very tight, the case was designed so that all the air from the bottom case-fan passes over the GPU. The air from the top case-fan passes over the CPU.
I've been running a Intel i7-7700K @ 4.9 Ghz in this machine. However, for this test, I dropped the CPU back to its default clock/voltage/etc. I ran a number of tests and logged the results with a "Kill A Watt" electricity usage monitor. This displays the current power usage and also records the max and average usage over time. I used a combination of Open Hardware Monitor and MSI Afterburner to log temps, clocks, etc. Firestrike and Time Spy benchmarks were used to generate the results.
I was suprised that the GTX 1080 was only slightly warmer and only used 12W more power than the 1070.
I'm not going to go in-depth on the performance. You can find 1080 benchmarks on hundreds of sites. The performance in in-line with other 1080s. The purpose of this review was to determine how the card would hold up in SFF situations.
Gigabyte 1080 ITX/Mini Firestrike: 17,337 (Click score to view report)
I was able to run a moderate overclock of +150 MHz on the clock and +300MHz on the ram. I increased the power limit to 110% but did not manually add anything to the voltage.
Gigabyte 1080 ITX/Mini Firestrike (OC): 18,072 (Click score to view report)
The performance, thermals and power usage will come as no suprise if you're farimilar with Gigabyte's previous GTX 1070 ITX/Mini. The card performed very well in a small form factor enviorment, never going above 70c. It even has some headroom for overclocking.
I hope we see more manufacturers release ITX sized cards. One of the biggest compromises you often have to make on a SFF build is the inability to use a full size GPU. Gigabyte's ITX/Mini offerings are a step in the right direction. Now if only we could get a 1080 Ti in ITX!