GeForce GT 240 GDDR5 vs Radeon R9 285

Intro

Compare all that to the Radeon R9 285, which features GPU clock speed of 918 MHz, and 2048 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is comprised of 1792 Stream Processors, 112 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon R9 285		190 Watts
	Difference: 120 Watts (171%)

Memory Bandwidth

The Radeon R9 285 should theoretically be quite a bit faster than the GeForce GT 240 GDDR5 overall. (explain)

Radeon R9 285		176000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 121600 (224%)

Texel Rate

The Radeon R9 285 will be quite a bit (more or less 484%) more effective at texture filtering than the GeForce GT 240 GDDR5. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 85216 (484%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 285 is the winner, by a large margin. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 24976 (568%)

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 transported over the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number of texture map elements (texels) that are processed in one second. This figure is calculated 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs 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 output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.