GeForce GT 240 GDDR5 vs Geforce GTX 770

Intro

Compare all that to the Geforce GTX 770, which comes with core speeds of 1046 MHz on the GPU, and 1753 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Geforce GTX 770		230 Watts
	Difference: 160 Watts (229%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 770 should theoretically be quite a bit better than the GeForce GT 240 GDDR5 in general. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 169984 (312%)

Texel Rate

The Geforce GTX 770 will be quite a bit (more or less 661%) faster with regards to anisotropic filtering than the GeForce GT 240 GDDR5. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 116288 (661%)

Pixel Rate

The Geforce GTX 770 should be a lot (approximately 661%) faster with regards to full screen anti-aliasing than the GeForce GT 240 GDDR5, and will be able to handle higher screen resolutions while still performing well. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 29072 (661%)

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 maximum amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 ability to get to the maximum fill rate.