GeForce GTX 465 vs Radeon HD 4790

Intro

Compare those specs to the Radeon HD 4790, which features GPU clock speed of 600 MHz, and 512 MB of GDDR5 RAM running at 800 MHz through a 256-bit bus. It also features 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 465 should in theory be a small bit faster than the Radeon HD 4790 in general. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 192 (0%)

Texel Rate

The GeForce GTX 465 is much (approximately 39%) more effective at anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 7508 (39%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 465 is a better choice, by a large margin. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 9824 (102%)

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 (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.