GeForce 9800 GTX vs GeForce GTS 450

Intro

Compare all of that to the GeForce GTS 450, which makes use of a 40 nm design. nVidia has set the core speed at 783 MHz. The GDDR5 memory works at a frequency of 902 MHz on this model. It features 192 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
GeForce 9800 GTX		140 Watts
	Difference: 34 Watts (32%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GTX should in theory be a lot superior to the GeForce GTS 450 in general. (explain)

GeForce 9800 GTX		70400 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 12672 (22%)

Texel Rate

The GeForce 9800 GTX will be a lot (approximately 72%) better at AF than the GeForce GTS 450. (explain)

GeForce 9800 GTX		43200 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 18144 (72%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTS 450 is superior to the GeForce 9800 GTX, but only just. (explain)

GeForce GTS 450		12528 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 1728 (16%)

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 megabytes per second) that can be moved over the external memory interface in a second. It 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 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics 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 maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.