GeForce GTS 450 1GB vs GeForce GTX 285 2GB

Intro

Compare all that to the GeForce GTX 285 2GB, which has a core clock speed of 648 MHz and a GDDR3 memory frequency of 1242 MHz. It also makes use of a 512-bit memory bus, and uses a 55 nm design. It is made up of 240 SPUs, 80 TAUs, and 32 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 GTX 285 2GB		204 Watts
	Difference: 98 Watts (92%)

Memory Bandwidth

Performance-wise, the GeForce GTX 285 2GB should in theory be much superior to the GeForce GTS 450 1GB in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 101248 (175%)

Texel Rate

The GeForce GTX 285 2GB should be quite a bit (more or less 107%) faster with regards to AF than the GeForce GTS 450 1GB. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 26784 (107%)

Pixel Rate

The GeForce GTX 285 2GB will be much (more or less 66%) faster with regards to anti-aliasing than the GeForce GTS 450 1GB, and also able to handle higher screen resolutions better. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
GeForce GTS 450 1GB		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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the 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 most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number 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 drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.