Autumn 1996 came and before anyone could yet realize first Rage will have miserable Direct3D compatibility, ATI unveiled second chip of the line. This time the architecture was definitely up to date with all of the critical 3d features working. And ATI did not sacrifice any of it's other goodies, in fact redesigned the Mach64 core and adds hardware MPEG2 playback. 48-level command FIFO should help throughoutput. All 3d primitives from points to quadrilaterals are supported. Announced performance was 26 million perspectively correct texture mapped pixels per second. Considering full availability in Christmas season such figure was far from exciting. More promising feature could be texture compression technique with two to four times compression ratio, but by this ATi understood less exciting palletized textures. Considering how many boards shipped with only two megabytes of memory, it is welcome addition nonetheless. Most important was z-buffering implemented in hardware, as it became requirement for many Direct3D games. Cards with original Rage II chip were usually named 3D Xpression+.Rage II in person
I bought this board with four memory chips in hope it is 4 MB, but it seems only way to get first Rage II with such capacity is through cards with memory expansion module. This will limit number of tests but never mind, better to have casual card than rarely used exception. There should be also 3D PRO TURBO PC2TV with 4 MB onboard which could with expansion reach the maximum of 8 MB but good luck finding that. My clocking tools detects single frequency of 68 MHz, which should be memory clock since ATI's performance figures suggest 52 MHz chips clock or 56 for PC2TV. With 4:5 ratio, same as first Rage, my card could have realistic 54/68 MHz clocks. Driver selected VT3 string for the card, which is interesting. As far as I could search, VT3 was a solution integrated to motherboards. This is not so surprising, we are in the years when ATi's offerings were at it's most confusing and clocks were not set in stone.Experience3d gaming with mere 2 MB is very limiting even if the chip was powerful. And Rage II ain't some speedster. For it's time it is quite feature rich and can draw nice pictures, unless one nasty bug kicks in. Similarly to Laguna3D all members of Rage II family suffers from perspective problems, some surfaces are just wavy instead of straight. There are tweakers with sliders that should help with this issue sacrificing some performance, but I couldn't achieve any change. Maybe newer drivers broke compatibility with the tweak. As for driver bugs, I found only one serious, objects are disappearing in Battlezone. Not because of lack of memory, this happens for all Rage II cards reviewed. Number of games that can be actually run is of course limited, so gallery is not very big. There is one suspicious image quality issue, textures often seem to have reduced color range. Yet the driver is not preferring 5550 format, there is no speed improvement anyway. Needless to say 32 bit frame-buffer color with so little memory, even if well implemented, is out of question. Blending unit looks flexible enough for any mode early Direct3d apps could throw at it. Only vertex fogging is performed rather slowly and often incompatible with transparent surfaces.
Ati Rv6de-b3 Driver