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Xabre Rattling - SiS's New Graphics Chip


SiS will be bringing the Xabre chip to market in several different flavors, the first of which will be the Xabre400, which will also be the fastest version for the time being. Two more versions, the 200 and 80, will be introduced later as less expensive alternatives. While the two bigger versions will differ only in clockspeed, the small 80 version will lack an AGP 8x interface and be limited to using either simple 128 bit SDRAM or 64 bit DDR-RAM. That clearly makes this version a perfect choice for system integrators and the low-cost OEM market. Here's an overview of the chips:

NVIDIA GeForce4 Ti4200NVIDIA GeForce4 MX460ATI Radeon 8500ATI Radeon 9000 ProSiS Xabre400
Chip Technology256 bit256 bit256 bit256 bit256 bit
Process0.15 Micron0.15 Micron0.15 Micron0.15 Micron0.15 Micron
Transistors63 Mio-60 Mio--
Memory Bus128 bit DDR128 bit DDR128 bit DDR128 bit DDR128 bit DDR
Memory Bandwidth8,2 GB/s8,8 GB/s8,8 GB/s8,8 GB/s8,2 GB/s
AGP Bus1x/2x/4x1x/2x/4x1x/2x/4x1x/2x/4x/8x1x/2x/4x/8x
Memory64/128 MB128 MB64/128 MB64/128 MB64 MB
GPU Clock250 MHz300 MHz275 MHz275 MHz250 MHz
Memory Clock(514) MHz 64 MB(444) MHz 128 MB275 (550)MHz 275 (550)MHz 275 (550)MHz 250 (500) MHz
MemorySD/BGA 3,3-4nsBGA 3,3nsSD/BGA 3,3nsSDSD 3,3-4ns
Vertex Shader2-22-
Pixel Pipelines42444
Texture Units Per Pipe22212
Textures per Texture Unit44364
Vertex S. Version1.1-
Pixel S. Version1.3-
DirectX Generation87.
FSAA ModiMulti SamplingMulti SamplingSuper SamplingSuper SamplingSuper Sampling
Memory OptmizationsLMA IILMA IIHyper Z IIHyper Z IINot Specified
Display Outputs22222
Chip Internal Ramdacs2 x 400 MHz2 x 400 MHz2 x 400 MHz2 x 400 MHz1 x 400 MHz, 1x 160 MHz
Chip External Ramdacs----SiS 301B
Bits per Color Channel88888
Special-TV Encoder On-Chip-TV Encoder On-Chip; FullStream
Estimated Price~ $179$149$179$149$149