The current generation AMD GPU series collectivelly known as "Southern Islands" were released over a year ago, with the beginning of its rollout in January 2012. Sixteen months later, the Radeon HD 7000 series is still very much relevant, as AMD continues to release new models under the same GPU family.

Although it's been over a year since AMD launched the Radeon HD 7970, we are just getting an official dual-GPU version. The Radeon HD 7990 takes a pair of 7970 GPUs with overclocked cores and memory, packing 8.2 TFLOPS computer power, 6GB GDDR5 and an upgraded PEX bridge to connect the two GPUs.

Simulating the physics of water has always been tricky and game engines sometimes still have to use dodgy mechanics to make it feel real. But the above demonstration of this new fluid simulation technique proves that slowly but surely we're getting there.

While full-sized desktop computers are still around, tablets and smartphones have proven that technology has come far enough to essentially cram a fully capable computer into a space that is suitable for your pants pocket, a purse, or a small backpack. This idea of shrinking hardware hasn’t been overlooked by manufacturers as several now feature space-saving designs based on mobile hardware.

Such is the case with Sapphire’s new Edge VS8 mini-PC powered by AMD’s A8 APU. The system is hardly any larger than an external optical drive, while still packing 4GB of DDR3 memory, Radeon HD 7600G graphics, a 500GB SATA HDD, built-in support for Bluetooth 3.0 as well as 802.11 b/g/n wireless and a bevy of rear I/O connections.

The GTX 650 Ti was our favorite $100 - $150 graphics card last year, as it thrashed the Radeon HD 7770, its direct competitor. Then last month AMD decided to attack the $150 price point with a new HD 7790 GPU, but the reaction didn't take long to arrive.

Just a week later Nvidia officially countered by releasing the poorly named GeForce GTX 650 Ti Boost, now the third graphics card to carry the GTX 650 name. At $170, the GeForce GTX 650 Ti Boost sits between the Radeon HD 7790 and the 7850. In terms of performance, we actually expect the GeForce GTX 650 Ti Boost to be a lot faster than the GTX 650 Ti, even when it's based on the same GK106 architecture.

With DX10's arrival, vertex and pixel shaders maintained a large level of common function, so moving to a unified shader arch eliminated a lot of unnecessary duplication of processing blocks. The first GPU to utilize this architecture was Nvidia's iconic G80.

Four years in development and $475 million produced a 681 million-transistor, 484mm² behemoth -- first as the 8800 GTX flagship and then with cards aimed at several segments. Aided by the new Coverage Sample anti-aliasing (CSAA) algorithm, Nvidia saw its GTX demolish every single competitor in outright performance.