GeForce GT 240 GDDR5 1GB vs Radeon R9 380X

Intro

Compare those specifications to the Radeon R9 380X, which uses a 28 nm design. AMD has clocked the core speed at 970 MHz. The GDDR5 RAM works at a frequency of 1425 MHz on this specific model. It features 2048 SPUs along with 128 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 380X		190 Watts
	Difference: 120 Watts (171%)

Memory Bandwidth

Theoretically, the Radeon R9 380X should perform much faster than the GeForce GT 240 GDDR5 1GB overall. (explain)

Radeon R9 380X		182400 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 128000 (235%)

Texel Rate

The Radeon R9 380X should be much (approximately 605%) better at texture filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon R9 380X		124160 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 106560 (605%)

Pixel Rate

The Radeon R9 380X should be much (approximately 605%) better at full screen anti-aliasing than the GeForce GT 240 GDDR5 1GB, and able to handle higher screen resolutions better. (explain)

Radeon R9 380X		31040 Mpixels/sec
GeForce GT 240 GDDR5 1GB		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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR 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 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 number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling 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 the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.