Thresh's Firingsquad heeft een brede preview van de Microsoft X-Box neer gemikt. In het artikel wordt de technische architectuur van het apparaat besproken alsmede de positie van de X-Box bij game developers en de technical demo's die op de Microsoft presentatie werden gegeven. De specificaties van de X-Box geven tevens een goede indruk van hetgeen we van de nVidia NV25 mogen verwachten. Deze krijgt volgens de informatie van Firingsquad een fillrate van maar liefst 4,8Gigapixels per seconde:
We see from the numbers that the X-Box will fill at a very impressive 4.8 gigapixels per second! This is about twice as much as the Playstation 2, 4 times higher than the Voodoo 5 6000's projected performance, and 6 or 7 times higher that what the NV15 is expected to output when it's released. And unlike the Playstation 2, the performance doesn't degrade after adding one or two textures; this gives the X-Box graphics processor almost a 10 gigatexel fill.But wait a second - the clock speed is "only" 300MHz! 4.8 gigapixels/300MHz = 16 pixels per clock. Does this infer a monstrous 16 pixel pipeline? It sounds outrageous now, but with current top end video cards giving a quad pixel pipe, it's not totally out of the question. There is another thing to consider as well. A wider pixel pipeline means even greater importance placed on the clock speed of the graphics chip. A 50MHz drop in the clock speed of a GeForce card means a 200 megapixel loss in fill rate. The same drop in clock speed of the X-Box would spell a nearly gigapixel (800 megapixel) loss in fill rate though! This presents another pitfall of early numbers - if NVIDIA can't hit the projected clockspeed of 300MHz (remember, there's precedent here with the TNT and TNT2), then these fillrate numbers go straight down the tubes. Time will tell.
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Thanks Vipertje voor de tip.
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zijn