GeForce GTX 285 1GB vs GeForce GTX 650

Intro

Compare that to the GeForce GTX 650, which features a GPU core clock speed of 1058 MHz, and 1024 MB of GDDR5 memory set to run at 1250 MHz through a 128-bit bus. It also is made up of 384 Stream Processors, 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 GTX 650		64 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 140 Watts (219%)

Memory Bandwidth

Theoretically, the GeForce GTX 285 1GB should be a lot faster than the GeForce GTX 650 overall. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 78976 (99%)

Texel Rate

The GeForce GTX 285 1GB should be much (approximately 53%) better at texture filtering than the GeForce GTX 650. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 17984 (53%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 285 1GB is a better choice, by far. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 3808 (22%)

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 past the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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