When comparing Asus GeForce GTX 1070 ROG Strix OC vs Gainward GeForce GTX 1070 Phoenix GLH, the Slant community recommends Asus GeForce GTX 1070 ROG Strix OC for most people. In the question“What are the best GTX 1070 cards?” Asus GeForce GTX 1070 ROG Strix OC is ranked 4th while Gainward GeForce GTX 1070 Phoenix GLH is ranked 13th. The most important reason people chose Asus GeForce GTX 1070 ROG Strix OC is:
The GTX 1070 Asus ROG Strix, like its powerful sibling (GTX 1080 ROG Strix) has a full-size metallic backplate which provides extra rigidity. Around the backplate Asus has included Aura RGB lighting with a wide array of different effects available, making the ROG Strix a good choice for building a rig into a windowed chassis. The effects and color can be customized by installing an additional free utility which is also pretty lightweight.
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Pro Good build quality
The GTX 1070 Asus ROG Strix, like its powerful sibling (GTX 1080 ROG Strix) has a full-size metallic backplate which provides extra rigidity. Around the backplate Asus has included Aura RGB lighting with a wide array of different effects available, making the ROG Strix a good choice for building a rig into a windowed chassis.
The effects and color can be customized by installing an additional free utility which is also pretty lightweight.
Pro Above average cooling
The triple-fan cooling system and the optional fans you can add push ROG Strix' cooling performance to above-average levels for a GTX 1070 card. Without any additional fans and under heavy load it will rarely surpass the 61 degree C limit with only the Zotac GTX 1070 AMP! Extreme having better cooling.
Pro Has a second HDMI port for added Virtual Reality compatibility
Instead of having three DisplayPorts like most GTX 1070 cards, Asus have opted to exchange one of them in favor of an additional HDMI port. According to them, this change has been implemented to make it possible to attach both a VR device and a display at the same time. This increases VR compatibility since there have been problems with DisplayPort as a conduit for VR headsets.
Pro Additional fans can be attached for even better cooling
There are two four-pin headers at the end of the PCB used to attach additional fans. These headers can be used to improve even more the excellent cooling that the ROG Strix provides.
The Gainward GTX 1070 GLH has a BIOS-switch which lets you switch between two different BIOSes. One of them has regular clock speeds and the other is overclocked. This way, should you need to return to regular clock speeds if something goes wrong with overclocking, you can easily do it by using the BIOS-switch.
As is the case with many high-end cards, the size of this card means it takes up two backplate slots but covers roughly 3 slots (including the one it's fitted to). This might limit your options for some motherboards, especially configurations smaller than ATX.
Con The Aura (RGB lights) software can be better
The software that controls the backlights can be better and has some missing features which feel like it would have been pretty easy to bake them in, especially for this price and for the fact that Asus went through the hassle of adding them in the first place.
Things like being able to set the temperature for which the lights change or making the lights a certain color when playing a certain game would certainly have been a nice addition.
Con The lighting only supports red, green or blue
The logo on the back of the card has lighting which supports red, green or blue. That is, not the full RGB color spectrum, but only those three individual colors.
Con Weird color scheme
The red, black and gold color scheme is not for everyone. If it had been just red and black it would have been much better and much easier to find a suitable motherboard, case and everything else to fit that color scheme. While not a deal breaker for most people who are only interested in performance, it can be a bit annoying for people who care about how their build looks.