GeForce GT 240 GDDR5 1GB vs Radeon R9 280X

Intro

Compare all of that to the Radeon R9 280X, which comes with a GPU core clock speed of 850 MHz, and 3072 MB of GDDR5 memory set to run at 1500 MHz through a 384-bit bus. It also is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon R9 280X		250 Watts
	Difference: 180 Watts (257%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 280X is 429% quicker than the GeForce GT 240 GDDR5 1GB in general, because of its greater data rate. (explain)

Radeon R9 280X		288000 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 233600 (429%)

Texel Rate

The Radeon R9 280X is a lot (approximately 518%) better at anisotropic filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon R9 280X		108800 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 91200 (518%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 280X is superior to the GeForce GT 240 GDDR5 1GB, by far. (explain)

Radeon R9 280X		27200 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 22800 (518%)

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 information (measured in MB per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the 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 maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.