GeForce RTX 3060 gaming graphics card: using leftovers with the GA104 GPU
Both manufacturers Gainward and Galaxy (called KFA2 in Germany) no longer use the GA106 graphics chip actually intended for individual GeForce RTX 3060 models, but rather the larger GA104 in a lean form. The latter was previously only on GeForce RTX 3070 Ti, RTX 3070 and RTX 3060 Ti graphics cards.
New GeForce RTX 3060 variants with GA104 GPU have so far only been shown in China, Gainward and Galaxy, again Videocardz remark. This is the third GPU variant that Nvidia released for the GeForce RTX 3060. The GA106 (-300) was originally used. Later, Nvidia changed the PCI credentials to renew the Ethereum mining brake and put the technically identical GA106-302.
Newer versions of the GeForce RTX 3060 use the more trimmed expansion stage of the GA104 GPU, called GA104-150. The specifications remain the same on paper: 28 multiprocessor shaders (SMs, 3584 shader cores) with a boost clock frequency of nearly 1900 MHz, as well as 12 GB of GDDR6 RAM on 192 data paths.
The deviations in detail
The full version of GA104 accommodates 48 SMs with 6144 shader cores – so over 40% is disabled. With this step, Nvidia increases the yield, because it is possible to recycle graphics chips with too many defects for use on a GeForce RTX 3060 Ti for example. For twelve months, rumors have circulated that Samsung, the chipmaker, has problems with the performance of the 8 nanometer process chosen by Nvidia.
The performance of the RTX 3060 versions is expected to be at a similar level, but could differ in details due to different designs. The GA106 organizes 10 SMs each into three graphics processing clusters (GPCs), which also contain things like rasterizers. The GA104 has six such GPCs with 8 SM each. In order to achieve the same number of core shaders, Nvidia must have at least one additional GPC enabled, with which the arithmetic units of the GA104-RTX-3060 can potentially be fed data faster.
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