GeForce 9800 GTX vs Geforce GTX 670

Intro

Compare those specifications to the Geforce GTX 670, which has a GPU core clock speed of 915 MHz, and 2048 MB of GDDR5 RAM running at 1500 MHz through a 256-bit bus. It also is comprised of 1344 Stream Processors, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX		140 Watts
Geforce GTX 670		170 Watts
	Difference: 30 Watts (21%)

Memory Bandwidth

In theory, the Geforce GTX 670 is 173% faster than the GeForce 9800 GTX in general, because of its higher data rate. (explain)

Geforce GTX 670		192000 MB/sec
GeForce 9800 GTX		70400 MB/sec
	Difference: 121600 (173%)

Texel Rate

The Geforce GTX 670 is much (about 137%) faster with regards to anisotropic filtering than the GeForce 9800 GTX. (explain)

Geforce GTX 670		102480 Mtexels/sec
GeForce 9800 GTX		43200 Mtexels/sec
	Difference: 59280 (137%)

Pixel Rate

The Geforce GTX 670 should be a lot (more or less 171%) better at FSAA than the GeForce 9800 GTX, and capable of handling higher screen resolutions without losing too much performance. (explain)

Geforce GTX 670		29280 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 18480 (171%)

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 maximum amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units by the core 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.