GeForce GT 240 GDDR5 vs GeForce GTX 980

Intro

Compare that to the GeForce GTX 980, which has core speeds of 1126 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
GeForce GTX 980		165 Watts
	Difference: 95 Watts (136%)

Memory Bandwidth

Performance-wise, the GeForce GTX 980 should theoretically be a lot better than the GeForce GT 240 GDDR5 in general. (explain)

GeForce GTX 980		224000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 169600 (312%)

Texel Rate

The GeForce GTX 980 is quite a bit (approximately 719%) faster with regards to texture filtering than the GeForce GT 240 GDDR5. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 126528 (719%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 980 is superior to the GeForce GT 240 GDDR5, by a large margin. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 67664 (1538%)

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 (in units of megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the 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 number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.