Inrecent weeks, we had quite a few AMD graphics cards in the test, nowonder, with the exception of the GeForce GTX 680 NVIDIA knows thebroad-based Radeon HD 7000 family is not much to oppose, today wededicate ourselves to two "Cape Verde" models, the unequalcould not be. During the Sapphire Radeon HD 7770 OC has its owncooling system away from the reference layout features and on top ofthat with higher clock rates is the Sapphire Radeon HD cooled 7750Ultimate is completely passive, must be but keep strictly to theguidelines, the AMD, the smaller series provides member, we havetested the Sapphire Radeon HD 7770 OC and the Sapphire Radeon HD 7750Ultimate through their paces.


Granted,the Sapphire Radeon HD 7770 OC Radeon HD 7750 Ultimate and anunlikely pair, but they show quite what AMD's DirectX 11.1 GPUsmallest known "Cape Verde" is possible. While the RadeonHD 7770 OC to the faster "XT" variant, and is on top of aseparate cooling system off kept the reference to temperature andalso equipped with a slightly higher clock rates, it must be thelittle brother to settle for the "Pro" version and adherestrictly to the guidelines of the American graphic team.

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For thishe gives thanks to a sophisticated passive cooler, which was providedwith numerous thick aluminum fins and copper heat pipes, not a singlesound, we have the Sapphire Radeon HD 7770 OC, and the Radeon HD 7750Ultimate hunted in the same house by our broad-based benchmark suiteand felt the two mid-range graphics cards belonging to the tooth.


Beforewe begin, however, our measurements and benchmarks to start with,let's take another closer look at the architecture of the two "CapeVerde" GPUs, like all current graphics cards, the Radeon HD 7000family, these graphics processors in the advanced 28-nm process aremade, with 1.5 billion transistors, but not quite as complex as"Pitcairn" or even Tahiti.


Thesavings are attributed circuits largely missing units, has a RadeonHD 7970 has 32 compute units are, the smaller sister models, only tenor eight such shader groups to the side, have been preserved per CUbut four SIMD units, which are divided again into 16 ALUs.