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:
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Header Cell - Column 0
NVIDIA GeForce4 Ti4200
NVIDIA GeForce4 MX460
ATI Radeon 8500
ATI Radeon 9000 Pro
SiS Xabre400
Chip Technology
256 bit
256 bit
256 bit
256 bit
256 bit
Process
0.15 Micron
0.15 Micron
0.15 Micron
0.15 Micron
0.15 Micron
Transistors
63 Mio
-
60 Mio
-
-
Memory Bus
128 bit DDR
128 bit DDR
128 bit DDR
128 bit DDR
128 bit DDR
Memory Bandwidth
8,2 GB/s
8,8 GB/s
8,8 GB/s
8,8 GB/s
8,2 GB/s
AGP Bus
1x/2x/4x
1x/2x/4x
1x/2x/4x
1x/2x/4x/8x
1x/2x/4x/8x
Memory
64/128 MB
128 MB
64/128 MB
64/128 MB
64 MB
GPU Clock
250 MHz
300 MHz
275 MHz
275 MHz
250 MHz
Memory Clock
(514) MHz 64 MB(444) MHz 128 MB
275 (550)
MHz 275 (550)
MHz 275 (550)
MHz 250 (500) MHz
Memory
SD/BGA 3,3-4ns
BGA 3,3ns
SD/BGA 3,3ns
SD
SD 3,3-4ns
Vertex Shader
2
-
2
2
-
Pixel Pipelines
4
2
4
4
4
Texture Units Per Pipe
2
2
2
1
2
Textures per Texture Unit
4
4
3
6
4
Vertex S. Version
1.1
-
1.1
1.1
1.1
Pixel S. Version
1.3
-
1.4
1.4
1.3
DirectX Generation
8
7.1
8.1
8.1
8.1
FSAA Modi
Multi Sampling
Multi Sampling
Super Sampling
Super Sampling
Super Sampling
Memory Optmizations
LMA II
LMA II
Hyper Z II
Hyper Z II
Not Specified
Display Outputs
2
2
2
2
2
Chip Internal Ramdacs
2 x 400 MHz
2 x 400 MHz
2 x 400 MHz
2 x 400 MHz
1 x 400 MHz, 1x 160 MHz
Chip External Ramdacs
-
-
-
-
SiS 301B
Bits per Color Channel
8
8
8
8
8
Special
-
TV Encoder On-Chip
-
TV Encoder On-Chip; FullStream
Row 23 - Cell 5
Estimated Price
~ $179
$149
$179
$149
$149
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