Extreme Hardware vroeg Peter Wicher, product manager van 3dfx, waarom de Voodoo4 en Voodoo5 de wereld gaan verbeteren. Hier een stukje over de VSA100 architectuur:
Extreme Hardware: The various Voodoo4/5 cards specs look great, but could you state the full performance specifications and 3D features for a single VSA-100 chip?
Peter Wicher: Sure. VSA-100 is a major step beyond the Voodoo3. It renders two pixels per clock with a single texture per pixel or one pixel per clock with two textures per pixel. At the minimum 166MHz this provides 333Mpixels per second or twice the fill rate of Voodoo3. We improved the raster efficiency by about 20%, we increased the texture cache size, we added new texture combines and alpha blends, and we added guardband clipping, with a Ė4k, 4k range, which significantly offloads the CPU from doing 2D clip operations to speed up applications.
We focused on image quality more than anything else: 32-bit ARGB rendering, 24-bit depth buffer, 8-bit stencil buffer, 32-bit textures, 2Kx2K texture size, up to 64MB of frame buffer, 4X AGP, and both FXT1 and DXTC texture compression, and new alpha blends (Alpha subtract, src*src, dst*dst) are the key features. Itís important to note that our texture cache can store textures in compressed format thereby greatly increasing the effective cache size, increasing performance. As far as full-scene AA goes, a single VSA-100 is able to create two jittered sub-samples per pixel. We donít think thatís enough to do high-quality full-scene AA or digital cinematic effects therefore those features are only being enabled when two or four VSA-100ís are linked together in SLI.
Check het interview voor meer info.