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Politics : Formerly About Advanced Micro Devices

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To: Time Traveler who wrote (33052)	5/30/1998 12:58:00 PM
From: Maxwell	Read Replies (3) of 1571401

Time Traveller: Here is one answer to your question. Theory: Assuming running QUAKEII at 1024X768 resolution and 24 color bits and at 72 fps, then total bit throughput needed is Ouput Required = (24 colors)(72fps)(1024X768)= 1.358 Gbits/sec PCI Graphic is 32 bits at 33MHz: Output Rate= 33MHz32bits = 1.056 Gbits/sec AGP Graphic Port is 32 bits at 66MHz: Output Rate= 66MHz32bits = 2.112 Gbits/sec As you can see, AGP can handle 24 bit color with resolution of 1024X768 with no problem at 72fps. PCI can't keep up with such rate. Thus as long as the data is ready AGP can dump maximum 2.112Gits/sec to the monitor. This is the max they can do. Data: Go to www.bootnet.com This is what they got GL QUAKEII------K6-2-333-------PII-333 640 X 480-----------71.3fps---------68.8fps 800 X 600-----------71.3fps---------62.0fps 1024 X 768----------62.2fps--------44.7fps-----WOW! I am assuming that Bootnet tested the system with a PCI graphic card only and no AGP. With such assumption the maximum data out is 1.056 Gbits/sec. At 16 bit colors at 1024X768 at 72fps it requires 0.9 Gbits/sec and PCI is well capable of handle this. As you can see AMD-K6-2 achieves 62.2fps which is 0.78Gbits/sec and is limited by how much CPU/graphic card can calculate. PII can only dump 0.56 Gbits/s to the monitor. K6-2 is 39% faster than PII at same clock speed based on Quake II. One reason you don't see much improvement at low resolution is that it is due to how fast the monitor can refresh. The potential for the AMD-SIMP-3D engine is UNBELIEVABLE if the software programmers can harness it. AMD K6-2 is just a superior design. AGP architecture gives us about 2.1Gbits/s of data which is plenty but it is up to the CPU processing power to max out that number. Robert Grutza showed a frame of Trespasser www3.techstocks.com The graphic is quite real life but still far short. If you look at this image closely the main objects (the dinosaurs) are very sharp while the ground and sky are low resolution. It would be much more realistic had the sky and ground have the same resolution as the main objects. It is kind of difficult for me to look at the image of 2 resolutions. In order to have a full life picture of sharp resolution at high frames/sec the CPU must be able to handle the 3D calculation much higher than what is available now which is 1.3GFLOPs. Nevertheless this is the beginning of VIRTUAL REALITY and AMD is no question LEADING Intel! Maxwell

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