GeForce GT 240 GDDR5 vs Radeon HD 6750 1GB

Intro

Compare all that to the Radeon HD 6750 1GB, which comes with a clock speed of 725 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is made up of 720 SPUs, 36 TAUs, and 16 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon HD 6750 1GB		86 Watts
	Difference: 16 Watts (23%)

Memory Bandwidth

In theory, the Radeon HD 6750 1GB should be 18% quicker than the GeForce GT 240 GDDR5 overall, due to its higher data rate. (explain)

Radeon HD 6750 1GB		64000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 9600 (18%)

Texel Rate

The Radeon HD 6750 1GB should be much (more or less 48%) faster with regards to texture filtering than the GeForce GT 240 GDDR5. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 8500 (48%)

Pixel Rate

The Radeon HD 6750 1GB will be much (approximately 164%) more effective at full screen anti-aliasing than the GeForce GT 240 GDDR5, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 6750 1GB		11600 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 7200 (164%)

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 information (in units of megabytes per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many 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.