GeForce GTX 285 2GB vs GeForce GTX 650

Intro

Compare those specifications to the GeForce GTX 650, which comes with clock speeds of 1058 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 384 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 140 Watts (219%)

Memory Bandwidth

Performance-wise, the GeForce GTX 285 2GB should theoretically be a lot superior to the GeForce GTX 650 overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 78976 (99%)

Texel Rate

The GeForce GTX 285 2GB will be a lot (approximately 53%) faster with regards to texture filtering than the GeForce GTX 650. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 17984 (53%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 285 2GB is the winner, by a large margin. (explain)

GeForce GTX 285 2GB		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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported past 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 RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.