GeForce GT 240 GDDR5 vs Radeon R9 380 4G

Intro

Compare those specifications to the Radeon R9 380 4G, which features a core clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, 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 380 4G		190 Watts
	Difference: 120 Watts (171%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G should perform quite a bit faster than the GeForce GT 240 GDDR5 in general. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 128000 (235%)

Texel Rate

The Radeon R9 380 4G should be quite a bit (more or less 517%) more effective at anisotropic filtering than the GeForce GT 240 GDDR5. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 91040 (517%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 380 4G is superior to the GeForce GT 240 GDDR5, and very much so. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 26640 (605%)

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 (measured in megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the 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 - 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 of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.