GeForce GTX 285 1GB vs GeForce GTX 470

Intro

Compare all that to the GeForce GTX 470, which has core clock speeds of 607 MHz on the GPU, and 837 MHz on the 1280 MB of GDDR5 memory. It features 448 SPUs as well as 56 Texture Address Units and 40 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 1GB		204 Watts
GeForce GTX 470		215 Watts
	Difference: 11 Watts (5%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB will be 19% quicker than the GeForce GTX 470 overall, due to its higher data rate. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 470		133920 MB/sec
	Difference: 25056 (19%)

Texel Rate

The GeForce GTX 285 1GB is quite a bit (approximately 53%) more effective at AF than the GeForce GTX 470. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 17848 (53%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 470 is superior to the GeForce GTX 285 1GB, though only just barely. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 3544 (17%)

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 information (counted in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once 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 AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.