GeForce GTS 450 vs GeForce GTX 285 2GB

Intro

Compare that to the GeForce GTX 285 2GB, which features GPU core speed of 648 MHz, and 2048 MB of GDDR3 memory running at 1242 MHz through a 512-bit bus. It also is comprised of 240 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 98 Watts (92%)

Memory Bandwidth

Theoretically, the GeForce GTX 285 2GB should perform a lot faster than the GeForce GTS 450 in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 101248 (175%)

Texel Rate

The GeForce GTX 285 2GB will be a lot (more or less 107%) more effective at texture filtering than the GeForce GTS 450. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 26784 (107%)

Pixel Rate

The GeForce GTX 285 2GB should be quite a bit (approximately 66%) more effective at anti-aliasing than the GeForce GTS 450, and should be capable of handling higher screen resolutions better. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
GeForce GTS 450		12528 Mpixels/sec
	Difference: 8208 (66%)

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 maximum amount of information (in units of MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. 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 lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.