GeForce GTX 465 vs Radeon HD 5830

Intro

Compare that to the Radeon HD 5830, which features a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is made up of 1120(224x5) SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5830		175 Watts
GeForce GTX 465		200 Watts
	Difference: 25 Watts (14%)

Memory Bandwidth

In theory, the Radeon HD 5830 should be 25% quicker than the GeForce GTX 465 in general, because of its greater data rate. (explain)

Radeon HD 5830		128000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 25408 (25%)

Texel Rate

The Radeon HD 5830 will be much (approximately 68%) better at texture filtering than the GeForce GTX 465. (explain)

Radeon HD 5830		44800 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 18092 (68%)

Pixel Rate

The GeForce GTX 465 will be quite a bit (more or less 52%) more effective at FSAA than the Radeon HD 5830, and also able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 6624 (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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the 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 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.