| ethomaz said: I think the VGLeaks just used AMD specification... the AMD refers to ROPs like clusters and not the units. |
The confusion stems from the fact that they stated 8 ROPs (Raster Operators) when they should have stated 8 RBEs (Render Back-Ends). GCN doesn't have 8 ROPs, but 32 ROPs in flagship form because each of the RBEs has 4 ROPs, for a combined 32 ROPs. To say the GPU has 8 ROPs is technically misldeading since it mixes up the terms RBEs and ROPs. They do not mean the same thing. Similar to TMUs. Each CU is equipped with 4 texture units. Thus a 32 CU part would have 128 Texture Mapping Units, and an 18 CU part would have 72 TMUs. They listed the specs as 18 TMUs. Since R500 and RSX in PS360 were neutered on the ROP/memory channel side, people are obviously cognizant of the fact that it's very possible the GCN GPU could be neutered in some areas outside of CUs. That's why it was important to clarify if these specs were simply listed incorrectly in a misleading way or the GPU was actually neutered to just 8 ROPs from 32. The way in which they used those terms like ROP and TMU was incorrect. They should have at least labelled it as 8 RBEs and 18 Texture Clusters. Then people wouldn't have gotten confused.
