GeForce GT 240 GDDR5 1GB vs Radeon R9 270

Intro

Compare all that to the Radeon R9 270, which has a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1400 MHz. It also features a 256-bit bus, and uses a 28 nm design. It features 1280 SPUs, 80 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 1GB		70 Watts
Radeon R9 270		150 Watts
	Difference: 80 Watts (114%)

Memory Bandwidth

As far as performance goes, the Radeon R9 270 should theoretically be a lot better than the GeForce GT 240 GDDR5 1GB overall. (explain)

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

Texel Rate

The Radeon R9 270 will be much (more or less 309%) faster with regards to 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

The Radeon R9 270 is quite a bit (more or less 555%) better at full screen anti-aliasing than the GeForce GT 240 GDDR5 1GB, and also will be capable of handling higher resolutions better. (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: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.