GeForce GT 240 GDDR5 1GB vs GeForce GTX 280

Intro

Compare those specifications to the GeForce GTX 280, which has clock speeds of 602 MHz on the GPU, and 1107 MHz on the 1024 MB of GDDR3 memory. It features 240 SPUs as well as 80 Texture Address Units 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
GeForce GTX 280		236 Watts
	Difference: 166 Watts (237%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 280 should be 160% quicker than the GeForce GT 240 GDDR5 1GB overall, due to its higher bandwidth. (explain)

GeForce GTX 280		141696 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 87296 (160%)

Texel Rate

The GeForce GTX 280 should be a lot (more or less 174%) better at AF than the GeForce GT 240 GDDR5 1GB. (explain)

GeForce GTX 280		48160 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 30560 (174%)

Pixel Rate

The GeForce GTX 280 should be a lot (more or less 338%) better at AA than the GeForce GT 240 GDDR5 1GB, and should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 280		19264 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 14864 (338%)

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 maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core 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 fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.