GeForce GT 240 GDDR5 vs Radeon HD 6790

Intro

Compare all that to the Radeon HD 6790, which uses a 40 nm design. AMD has clocked the core frequency at 840 MHz. The GDDR5 memory is set to run at a speed of 1050 MHz on this particular model. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon HD 6790		150 Watts
	Difference: 80 Watts (114%)

Memory Bandwidth

Performance-wise, the Radeon HD 6790 should in theory be quite a bit superior to the GeForce GT 240 GDDR5 overall. (explain)

Radeon HD 6790		134400 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 80000 (147%)

Texel Rate

The Radeon HD 6790 will be much (more or less 91%) faster with regards to AF than the GeForce GT 240 GDDR5. (explain)

Radeon HD 6790		33600 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 16000 (91%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6790 is superior to the GeForce GT 240 GDDR5, by a large margin. (explain)

Radeon HD 6790		13440 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 9040 (205%)

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 largest amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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 bandwidth is, the lower the ability to reach the max fill rate.