First post, by W Gruffydd
From the wiki (yes, I know):
The Rush had the same specifications as Voodoo Graphics, but did not perform as well because the Rush chipset had to share memory bandwidth with the CRTC of the 2D chip. Furthermore, the Rush chipset was not directly present on the PCI bus but had to be programmed through linked registers of the 2D chip. Like the Voodoo Graphics, there was no interrupt mechanism, so the driver had to poll the Rush in order to determine whether a command had completed or not; the indirection through the 2D component added significant overhead here and tended to back up traffic on the PCI interface. The typical performance hit was around 10% compared to Voodoo Graphics, and even worse in windowed mode. Later Rush boards released by Hercules had 8 MiB VRAM and a 10% higher clock speed to close the performance gap.
A rare third version was produced which featured a Cirrus Logic 2D chip. This version fixed the PCI bus collisions and memory interface problems.
I see the 8MB Voodoo Rush cards for sale often enough (Hercules and 2theMAX), but I haven't seen benchmarks for these vs. the 6MB version. Nor have I seen the alleged version with the Cirrus Logic 2D chip, let alone benchmarks. I look for the Cirrus Logic markings on chips of the boards I encounter, but I've not netted anything so far.
