GeForce GT 240 GDDR5 1GB vs Geforce GTX 690

Intro

Compare all that to the Geforce GTX 690, which comes with core speeds of 915 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. 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 1GB		70 Watts
Geforce GTX 690		300 Watts
	Difference: 230 Watts (329%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 690 should be 607% quicker than the GeForce GT 240 GDDR5 1GB in general, due to its higher data rate. (explain)

Geforce GTX 690		384512 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 330112 (607%)

Texel Rate

The Geforce GTX 690 should be quite a bit (approximately 1231%) faster with regards to anisotropic filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 216640 (1231%)

Pixel Rate

The Geforce GTX 690 should be much (about 1231%) more effective at full screen anti-aliasing than the GeForce GT 240 GDDR5 1GB, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 54160 (1231%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, the result 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 anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.