GeForce GT 240 GDDR5 1GB vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which comes with core speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon R9 285		190 Watts
	Difference: 120 Watts (171%)

Memory Bandwidth

In theory, the Radeon R9 285 should perform quite a bit faster than the GeForce GT 240 GDDR5 1GB overall. (explain)

Radeon R9 285		176000 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 121600 (224%)

Texel Rate

The Radeon R9 285 will be a lot (about 484%) more effective at texture filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 85216 (484%)

Pixel Rate

The Radeon R9 285 will be quite a bit (approximately 568%) faster with regards to anti-aliasing than the GeForce GT 240 GDDR5 1GB, and also should be able to handle higher screen resolutions better. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce GT 240 GDDR5 1GB		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: Bandwidth is the max amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses 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 are processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.