xbox grafikchip: gf3 oder gf4 derivat?

[Hamster]

moin.

bisher war ich immer der meinung in der xbox sitzt nichts anderes als ein abgewandelter geforce4 chip. doch nun lese ich immer häufiger der chip entspreche eher einer geforce3. was stimmt jetzt?

[[dzp]Viper]

ich bin der meinung, dass es ein verbesserter geforce 3 chip ist - also geforce 3,4 ;)

[Exxtreme]

Das Teil ist AFAIK ein Hybride zw. GF3 und GF4.

AFAIK hat das Teil aber kein LMA.

[Hamster]

mhh, das sagt nvidia:


Original: http://www.nvidia.com/view.asp?PAGE=console
The future of gaming has arrived with the most advanced video game console-Xbox™. Powered by an NVIDIA Xbox graphics processing unit (XGPU) and Xbox media and communications processor (MCPX), the Xbox delivers superior graphics, incredible audio, and broadband connectivity for the most intense, action-packed gaming experiences available.

Driven by the custom-designed NVIDIA XGPU, the Xbox has at least three times the graphics performance of other game consoles. Together, the NVIDIA XGPU and MCPX deliver jaw-dropping 3D graphics, DVD and HDTV, 3D environmental audio, and broadband connectivity.




Xbox Power Facts:

The Xbox has 80 Gigaflops of computing power. That's equivalent to the power found in a Cray C94 supercomputer.

It would take everyone on Earth one hour to calculate what the Xbox calculates every second.

If the HyperTransport link in the Xbox was a pipe carrying water, and every bit of information equalled one gallon, the pipe would fill up the Pacific Ocean every second!






und das sind die hardwarespecs:


Original: http://www.xbreporter.com/xbox_system_specifications.php

Xbox Hardware Specifications

CPU 733 MHz Intel Custom Pentium III
Front Side Bus 133 MHz - 1.0 GB/sec
RAM Micron 64 MB DDR SDRAM
Memory Bandwidth 6.4 GB/sec bus
Storage Medium 8 GB Hard Disk
(Western Digital, 5400 RPM)
I/O (Input / Output) w-5x DVD-ROM
Type 9 DVD - 8.5 GB single sided
4x Proprietary USB Game Ports (12 Mbps)
Broadband Ethernet Connection (100 Mbps)
Proprietary Audio/Video Connector
Graphics Processor Unit 250 MHz Custom-Designed NV2X
Max Polygon Performance 125 M/sec
Simultaneous Textures 4.8 G/Sec
Pixel Fill Rate 12w
Compressed Textures Yes (6:1)
Maximum resolution 1920 x 1080 (HDTV Required)
MPEG 2 Support Yes (Standard DVD)
HDTV Game Support Yes (HDTV Cable Required)
DVD Movie Playback Yes (DVD Remote Control Required)
Media Comm. Processor 200 MHz Processor Custom
Designed By NVIDIA
Controls Hard Disk & DVD
Controls High-Speed Ethernet
Controls Proprietary USB Game Ports
Controls Advanced Audio which uses:
licensed technology from UK's Sensaura 3D.
Peripheral Bus (MCP BUS) 400 MB/s (Full Duplex)
Broadband Enabled Yes (10/100 Mbps / TCP/IP / WinSock)
Audio Channels 256
3D Audio Support Yes (64 3D channels)
Operating System - Windows 2000 Core OS
(Custom designed by MS)
- DirectX 8.0a (Drivers)
- Part 1 of the OS is on the hard disk < 1 MB
- Part 2 of the OS can be DVD disc < 500 K
- (Part 1 includes the core OS, DirectX, DVD playback, some drivers and 3D user interface)
- (Part 2 includes things like libraries, other drivers and other features needed by the developer)
- OS takes less then 3 MB in RAM
- The OS has a 3D user interface when no games are inserted to play music CDs, run DVD movies etc.
- The games run in ring 0, known as kernel mode which is the fastest mode possible.
V-CHIP Parental control on DVD's with ESRB ratings
Size Width: ~31cm
Depth: ~27cm
Height: ~10cm
Total Internal Components 800

[Demirug]

NV2A liegt irgendwo zwischen NV20 und NV25. AFAIK aber näher am NV25.

Man hat wohl einfach das vom NV25 genommen was schon fertig war und hat noch ein paar Kompressionverfahren für Texturen und Vertexbuffer dazugepackt damit die 64 MB reichen.