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		| NV40, in comparison, sports no less than 222 million transistors on IBM's 130nm process. The graphics processor wields 16 pixel-pipelines and a 256-bit memory bus populated by GDDR-3 memory modules. 80% Rating:
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Nvidia Geforce 6800 Ultra |  |  |  nVidia Geforce 6800 Ultra Reference Videocard Review
 
 There's 
an old adage that reads something along the lines of "the only two sure things 
in life are death and taxes." Whoever coined that saying clearly wasn't a gamer. 
If they had been, it would have read "the only three sure things in life are 
death, taxes, and the obsolescence of your video card in six short months. 
Sorry. And your total comes to $424.67 - will that be cash or 
credit?." Without 
fail, the perpetual battle between videocard manufacturers results in faster 
video cards and lower prices. The cycle of tit-for-tat comes full circle with 
the recent unveiling of the Radeon X800 XT, a brutish piece of hardware designed 
to do battle with nVidia's lean green GeForce 6800 Ultra. Actually, both 
cards were designed to tear through all of the latest games at 1600x1200 with 
anti-aliasing and anisotropic filtering cranked up through the roof. It's all a 
matter of which card does it faster, conferring the best image quality in the 
process.  nVidia's 
NV40 GPU is a particularly important development for the company. After delaying 
the GeForce FX 5800 launch, nVidia played a year-long game of catch-up, 
complicated by a number of driver issues - specifically, software optimizations 
aimed at enhancing performance in certain benchmark applications. In fact, right 
up until it unveiled NV40 GPU in mid-April this year, nVidia hadn't enjoyed a 
significant performance advantage since the days of its GeForce 4 Ti 4600 
videocard. Then, suddenly, the game changed, and NV40 showed everyone that 
nVidia was back in the game. 
In order to 
fully appreciate the level of technical complexity involved in manufacturing 
NV40, the chip powering nVidia's GeForce 6800 Ultra, consider that the GeForce 
FX 5950 Ultra consists of 130 million transistors on TSMC's 130nm manufacturing 
process. It comes equipped with four pixel pipelines, each with two texture 
units and is backed by DDR memory on a 256-bit bus. NV40, in 
comparison, sports no less than 222 million transistors on IBM's 130nm process. 
The graphics processor wields 16 pixel-pipelines and a 256-bit memory bus 
populated by GDDR-3 memory modules. In its GeForce 6800 Ultra configuration, 
NV40 runs at 400MHz for a peak fill-rate of 6.4GPixels per second and as many 
texels.  The 
GeForce 6800 Ultra also boasts a 256MB frame buffer running at 550MHz, 
effectively 1.1GHz. Theoretically, the card should enjoy up to 35.2GB per second 
of memory bandwidth, though the effective rates are somewhat lower.
 One of the 
most prevalent features of the reference GeForce 6800 Ultra design, which 
third-party manufacturers may or may not adopt, is the dual DVI display output. 
NV40 doesn't natively feature a TMDS transmitter, so digital outputs are enabled 
through a pair of Silicon Image add-on chips.  Like the GeForce FX 5950 Ultra before it, nVidia's GeForce 6800 
Ultra consumes two slots - an AGP slot and its adjacent PCI slot - to 
accommodate the large, aluminum heatsink and squirrel cage fan mounted atop the 
graphics processor. Such a configuration presents problems when it comes to 
small form-factor systems, but the loss of one PCI slot in a typical desktop PC 
is not that big a deal for most gamers. nVidia is at a slight physical 
disadvantage when you compare it's 6800 Ultra reference card to its main 
competition, the Radeon X800 XT - a single-slot design that dissipates less 
heat than the 9800 XT before it.  As has been 
the case with the FX5950 Ultra, most manufacturers will opt to design their own 
cooling solutions which are quieter, and slimmer, rather 
than stick with the reference heatsink.  Fortunately, the fan cooling nVidia's new heatsink assembly 
is quieter than the original GeForce FX 5800 Ultra, and utilizes two speed 
settings - one for idling in 2D mode and another for dealing with the heat 
created by 222 million transistors while running 3D games. However, at no 
point during testing did the 6800 Ultra revert to the faster, noisier setting. 
 
 
			
			 
			
			
						 
  
		
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