The VSA-100 supports a hardware accumulation buffer, known as the "T-buffer". When rendering to the T-buffer, VSA-100 can store the combined outputs of several frames. This mechanism allows for creation of effects such as motion blur (if used temporally) and anti-aliasing (if used spatially). VSA-100 supports rotated-grid super-sampling anti-aliasing (RGSS AA) modes, with a maximum anti-aliasing level determined by the number of VSA-100 chips in the SLI configuration. One chip allows 2X AA, two chips allows 4X AA, four chips provides for 8X AA and so on. The RGSS method of anti-aliasing combines multiple samples of each frame, resulting in higher quality than the brute force ordered-grid over-sampling of ImgTech PowerVR, ATI Radeon DDR and NVIDIA GeForce 2. The chip implements a 128-bit SDRAM interface, again similar to the Voodoo3. Memory capacity and bandwidth is separately dedicated to each VSA-100 processor. While capacity is not cumulative across the entire card, bandwidth is effectively cumulative and thus a card with 2x VSA-100 processors has similar bandwidth to a single-chip graphics card using 128-bit DDR memory. Memory is clocked synchronously with the VSA-100 chip. Later, unreleased boards were planned to offer a 64-bit DDR memory design instead, in order to reduce board costs through lower complexity, while offering similar RAM performance. While VSA-100 is an AGP 4x capable graphics processor, 3dfx did not implement AGP texturing. Models Voodoo 4 4500 Released after the Voodoo 5 5500, the Voodoo4 4500 is the budget implementation of the VSA-100 product. It used only one VSA-100 chip and did not need an additional power connection. It was more expensive yet it was beaten in almost all areas by the GeForce2 MX and Radeon SDR. Voodoo 5 5000 The unreleased Voodoo 5 5000 was to be similar to the 5500 but with half of the RAM capacity (32 MB total). Voodoo 5 5500 The Voodoo 5 5500 comes in three flavors: a universal AGP version (AGP 1/2x, prototypes were made with AGP4x-interface) with full sideband support, PCI, and the Mac Edition, which is only available for PCI, though could run in 66 MHz PCI slots. The Mac Edition has dual link DVI-D and VGA-A outputs, the other versions just have one VGA-out. In games, the Voodoo 5 5500 is able to outperform the NVIDIA GeForce 256 and ATI Rage 128 MAXX, but unfortunately Voodoo5 5500 was late to market and was up against the new GeForce 2