GeForce 9800 GTX vs GeForce GTS 450

Intro

Compare all of that to the GeForce GTS 450, which comes with a core clock frequency of 783 MHz and a GDDR5 memory speed of 902 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It features 192 SPUs, 32 TAUs, and 16 ROPs.

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

Theoretically, the GeForce 9800 GTX should perform much faster than the GeForce GTS 450 overall. (explain)

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

Texel Rate

The GeForce 9800 GTX should be much (approximately 72%) better at anisotropic filtering 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 a high screen resolution is important to you, then the GeForce GTS 450 is superior to the GeForce 9800 GTX, but not by far. (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: Bandwidth is the max amount of data (measured in MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high 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 texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour 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 rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.