GeForce GTX 465 vs Radeon HD 7970

Intro

Compare all of that to the Radeon HD 7970, which has a GPU core clock speed of 925 MHz, and 3072 MB of GDDR5 RAM running at 1375 MHz through a 384-bit bus. It also is comprised of 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465		200 Watts
Radeon HD 7970		250 Watts
	Difference: 50 Watts (25%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7970 should theoretically be a lot superior to the GeForce GTX 465 in general. (explain)

Radeon HD 7970		264000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 161408 (157%)

Texel Rate

The Radeon HD 7970 should be much (more or less 343%) better at anisotropic filtering than the GeForce GTX 465. (explain)

Radeon HD 7970		118400 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 91692 (343%)

Pixel Rate

The Radeon HD 7970 is a lot (more or less 52%) better at anti-aliasing than the GeForce GTX 465, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 7970		29600 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 10176 (52%)

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 max amount of information (counted in MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, it must 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.