GeForce GT 240 GDDR5 vs Geforce GTX 670

Intro

Compare all that to the Geforce GTX 670, which has a clock speed of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is comprised of 1344 SPUs, 112 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Geforce GTX 670		170 Watts
	Difference: 100 Watts (143%)

Memory Bandwidth

The Geforce GTX 670 should in theory be quite a bit faster than the GeForce GT 240 GDDR5 in general. (explain)

Geforce GTX 670		192000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 137600 (253%)

Texel Rate

The Geforce GTX 670 should be quite a bit (more or less 482%) faster with regards to anisotropic filtering than the GeForce GT 240 GDDR5. (explain)

Geforce GTX 670		102480 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 84880 (482%)

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 670 is superior to the GeForce GT 240 GDDR5, by a large margin. (explain)

Geforce GTX 670		29280 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 24880 (565%)

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 megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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