GeForce GTX 285 1GB vs GeForce GTX 650 Ti 2GB

Intro

Compare that to the GeForce GTX 650 Ti 2GB, which has core speeds of 928 MHz on the GPU, and 1350 MHz on the 2048 MB of GDDR5 memory. It features 768 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 94 Watts (85%)

Memory Bandwidth

The GeForce GTX 285 1GB should theoretically be a lot faster than the GeForce GTX 650 Ti 2GB overall. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 72576 (84%)

Texel Rate

The GeForce GTX 650 Ti 2GB will be a small bit (more or less 15%) faster with regards to AF than the GeForce GTX 285 1GB. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 7552 (15%)

Pixel Rate

The GeForce GTX 285 1GB will be quite a bit (about 40%) more effective at anti-aliasing than the GeForce GTX 650 Ti 2GB, and will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 5888 (40%)

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 (in units of MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.