GeForce GT 240 GDDR5 1GB vs Radeon R9 270

Intro

Compare those specs to the Radeon R9 270, which uses a 28 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory works at a speed of 1400 MHz on this particular card. It features 1280 SPUs as well as 80 TAUs 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 270		150 Watts
	Difference: 80 Watts (114%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 will be 229% quicker than the GeForce GT 240 GDDR5 1GB overall, due to its higher bandwidth. (explain)

Radeon R9 270		179200 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 124800 (229%)

Texel Rate

The Radeon R9 270 should be much (more or less 309%) more effective at anisotropic filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 54400 (309%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 270 is a better choice, by a large margin. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GT 240 GDDR5 1GB		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 largest amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.