GeForce GT 240 GDDR5 1GB vs GeForce GTX 980

Intro

Compare all of that to the GeForce GTX 980, which has GPU clock speed of 1126 MHz, and 4096 MB of GDDR5 RAM set to run at 1750 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 128 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
GeForce GTX 980		165 Watts
	Difference: 95 Watts (136%)

Memory Bandwidth

Performance-wise, the GeForce GTX 980 should in theory be much better than the GeForce GT 240 GDDR5 1GB in general. (explain)

GeForce GTX 980		224000 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 169600 (312%)

Texel Rate

The GeForce GTX 980 will be a lot (approximately 719%) more effective at AF than the GeForce GT 240 GDDR5 1GB. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 126528 (719%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 980 is the winner, and very much so. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce GT 240 GDDR5 1GB		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: Bandwidth is the largest amount of data (counted in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.