The title challenges your math right? But Nvidia proves it. A very funny matter happened yesterday, a friend of mine called me up, he boasted of his new PC Intel Core2Duo 2.8Ghz, 4 GB RAM, both of which even I have, then he proudly said, and a Nvidia 9400gt, under the common impression that it was better than my Nvidia 8600. Little did he know that Nvidia's math is different.
Nvidia 8 and 9 series are almost identicle.
8400gt = 9400gt
8600gt = 9600gt
8800gt = 9800gt
There was slight improvements, however the 8 series are within 1-5% in benchmarks vs the 9 series
Therefore common sense will say a 9400gt is slightly better than a 8400gt, but the 8600gt will definately out perform a lower series 9400gt.
Same as the 8800gt out performs the 9600gt all day.
The amount of memory will only increase performance at higher resolutions by allowing more data to be stored.
At 800x600 resolution, a 8600gt with 256mb will still outperform a 1gb 9400gt. At 1024x768 or higher the tables will turn.
A 512mb 8600gt is a decent bet for this price level and perfomance.
The 8600 has twice the stream processors of a 9400 Gt, and performs somewhat better.
8600 GTS specs:
Stream Processors :32
Core Clock (MHz) :675
Shader Clock (MHz) :1450
Memory Clock (MHz) :1000
Memory Amount :256MB GDDR3 (also available in 512 MB)
Memory Interface :128-bit
Memory Bandwidth (GB/sec) :32
Texture Fill Rate (billion/sec) :10.8
9400 GT specs:
Stream processors :16
Core Clock (MHz) :550 MHz
Shader Clock (MHz) :1400 MHz
Memory Clock (MHz) :400 MHz
Standard Memory Config :512 MB (also available in 1 GB)
Memory Interface Width :128-bit
Memory Bandwidth (GB/sec) :12.8
Texture Fill Rate (billion/sec) :4.4
Other than the die shrinks the 9 series was mostly a rename and very similar to the 8 series.
So Friends I suggest that you first compare the Nvidia graphics cards at www.nvidia.com, do a thorough market survey, check out at multiple dealers, and only then decide to buy the graphic card.
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