Sapphire HD 7790 Dual-X OC Video Card Review

Gigabyte GeForce GTX 950 WindForce 2x Overclocking Edition

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At one point in my life, I became fascinated by how fireworks were able to explode and produce massive amounts of color. Being interested as a young child caused me to do some research and find out that different metals produce different colors when burned. The metals also have to burn properly to show the colors and each one burns at a different temperature. Later on, I discovered that the people who build these rockets use powdered metals so that they melt fast to produce fantastic colors. Like with most things, technology progresses and now we have shells that are loaded in such a way that they produce special shapes along with the colors.

Sapphire HD 7790 OC


For me there is magic in the air on July 4th in the USA. While I understand a lot of the chemistry behind fireworks, it is still amazing to watch it work and feel the report of the mortars explode. Just like with pyrotechnics, technology improves and more spectacular effects are possible. In the world of computer systems, this is driven by Graphics Processing Units (GPUs). The battle for GPU supremacy continues to rage on and the latest swipe of the blade comes from AMD with their introduction of the Radeon HD 7790.

Sapphire HD 7790 OC


The Sapphire Radeon HD 7790 OC edition is one of the latest GPUs based on AMD’s 28nm Graphics Core Next (GCN) architecture and uses the Bonaire GPU. The Sapphire 7790 features their custom dual-x cooling solution. The custom cooler is designed with two fans and multiple heat pipes to keep the card cool during intensive use. The GPU clock speed is factory overclocked to 1075 MHz from the standard 1GHz reference speeds. The 7790 also features AMD's newest version of their PowerTune technology, which is designed to be more power efficient and allow for higher clocks. The memory on the card is one gigabyte of GDDR5 and features a 128-bit bus, with an effective memory clock speed of 6400 MHz (400 MHz above reference).