GeForce 8800 GTS (G92) vs GeForce GTS 450 1GB

Intro

Compare those specifications to the GeForce GTS 450 1GB, which comes with a clock frequency of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is comprised of 192 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
GeForce 8800 GTS (G92)		135 Watts
	Difference: 29 Watts (27%)

Memory Bandwidth

In theory, the GeForce 8800 GTS (G92) should perform a bit faster than the GeForce GTS 450 1GB in general. (explain)

GeForce 8800 GTS (G92)		62080 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 4352 (8%)

Texel Rate

The GeForce 8800 GTS (G92) should be much (about 66%) more effective at texture filtering than the GeForce GTS 450 1GB. (explain)

GeForce 8800 GTS (G92)		41600 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 16544 (66%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 450 1GB is the winner, though only just barely. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
GeForce 8800 GTS (G92)		10400 Mpixels/sec
	Difference: 2128 (20%)

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 largest amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range 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 amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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