As well-thought-out as the Radeon HD 7000 series was, we kind of hoped 2012 would mark the beginning and the end for the series, much as 2011 did for the previous generation. Expecting something entirely new was not to be, as we are now three months into 2013 and we find ourselves reviewing a brand new AMD graphics card that isn’t based on a new architecture.
Rather what we have is the latest member of the Southern Islands family, designed to fill the gap between the Radeon HD 7770 and 7850.
Not the most exciting product to be released, and its performance will be a far cry from what we saw with the GeForce GTX Titan last month. That said, the new Radeon HD 7790 is likely going to be of more interest than the GTX Titan to many of you for the simple reason that it is affordable and should be pretty good value as well.
The AMD ATI Radeon HD 7770 measures 21cm (8.2in) long, the GPU core runs at 1GHz, it comes loaded with a 1GB frame buffer, the Radeon HD 7770 also carries 640 SPUs, 40 TAUs and 16 ROPs. The HD 7770 operates at near silence because even under load it only draws 80 watts and as little as 3 watts at idle, courtesy of the ZeroCore Power technology. Last but not least, AMD has included a single 6-pin PCI Express power connector.
The AMD ATI Radeon HD 7850 measures 24cm (9.4 in) long. The core clock frequency of the AMD ATI Radeon HD 7850 has been lowered from 1GHz to 860MHz. The GDDR5 memory still works at 1.2GHz, which is effectively 4.8GHz DDR. The HD 7850 has 1024 SPUs and 64 TAUs, while the ROPs remain at 32. It is also PCI Express 3.0-compatible
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