GeForce 9800 GT 512MB vs GeForce GTX 950

Intro

Compare all of that to the GeForce GTX 950, which has GPU clock speed of 1024 MHz, and 2048 MB of GDDR5 RAM running at 1652 MHz through a 128-bit bus. It also is comprised of 768 Stream Processors, 48 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950		90 Watts
GeForce 9800 GT 512MB		105 Watts
	Difference: 15 Watts (17%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 950 will be 84% faster than the GeForce 9800 GT 512MB in general, because of its greater bandwidth. (explain)

GeForce GTX 950		105728 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 48128 (84%)

Texel Rate

The GeForce GTX 950 is much (more or less 46%) better at texture filtering than the GeForce 9800 GT 512MB. (explain)

GeForce GTX 950		49152 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 15552 (46%)

Pixel Rate

The GeForce GTX 950 is a lot (more or less 241%) better at anti-aliasing than the GeForce 9800 GT 512MB, and also able to handle higher screen resolutions better. (explain)

GeForce GTX 950		32768 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 23168 (241%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.