first r420 review leak

[Dave Baumann]

The issue with the non-AA case is not with the output, but the inputs.

With Z/Stencils passes NV3x/NV4x effectively bypasses and the quad dispatch engine can "double pump" quads to the ROP's. ATI can't do this, but with FSAA the Z data is working at the level of AA (i.e. of 2X AA, 2X the Z buffer is created) - with AA its still working on a single quad, but with more Z detail per quad.

 

[Rican]

did b3d get a 6850 to?

 

[Rican]

looking at anadtech review the 6800GT/pro looks like a pretty goog part also and is a sigle slot card with 1 molex

 

[DemoCoder]

With stencil shadow volumes and a AA backbuffer, the R420 and NV40 should have similar z-throughput. When using rendertargets other than the backbuffer, MSAA won't be enabled, and 32x0 will come into play. This can occur on titles that use shadow buffers, or those that render depth textures for other effects.

 

[Neeyik]

With Z/Stencils passes NV3x/NV4x effectively bypasses and the quad dispatch engine can "double pump" quads to the ROP's. ATI can't do this, but with FSAA the Z data is working at the level of AA (i.e. of 2X AA, 2X the Z buffer is created) - with AA its still working on a single quad, but with more Z detail per quad.

Can you clarify this at all Dave? What exactly do you mean by "2x the Z buffer" and "Z detail" - higher buffer resolution or what?