GeForce GTX 465 vs Radeon HD 7790

Intro

Compare those specifications to the Radeon HD 7790, which uses a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory works at a speed of 1500 MHz on this specific model. It features 896 SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
GeForce GTX 465		200 Watts
	Difference: 115 Watts (135%)

Memory Bandwidth

Theoretically, the GeForce GTX 465 should be a small bit faster than the Radeon HD 7790 overall. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 6592 (7%)

Texel Rate

The Radeon HD 7790 will be much (about 110%) better at anisotropic filtering than the GeForce GTX 465. (explain)

Radeon HD 7790		56000 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 29292 (110%)

Pixel Rate

The GeForce GTX 465 is much (about 21%) better at full screen anti-aliasing than the Radeon HD 7790, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 3424 (21%)

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 (measured in megabytes per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units of the card 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 per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.