GeForce GT 240 GDDR5 vs Radeon R9 270

Intro

Compare those specifications to the Radeon R9 270, which features GPU clock speed of 900 MHz, and 2048 MB of GDDR5 RAM running at 1400 MHz through a 256-bit bus. It also is made up of 1280 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon R9 270		150 Watts
	Difference: 80 Watts (114%)

Memory Bandwidth

The Radeon R9 270 should theoretically be much faster than the GeForce GT 240 GDDR5 overall. (explain)

Radeon R9 270		179200 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 124800 (229%)

Texel Rate

The Radeon R9 270 will be quite a bit (more or less 309%) faster with regards to texture filtering than the GeForce GT 240 GDDR5. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 54400 (309%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 270 is a better choice, and very much so. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 24400 (555%)

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 (measured in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock 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 rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.