GeForce GTX 465 vs Radeon HD 7790

Intro

Compare those specs to the Radeon HD 7790, which comes with core speeds of 1000 MHz on the GPU, and 1500 MHz on the 1024 MB of GDDR5 RAM. It features 896 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

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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

In theory, the GeForce GTX 465 should be 7% faster than the Radeon HD 7790 overall, because of its higher data rate. (explain)

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

Texel Rate

The Radeon HD 7790 should be a lot (more or less 110%) faster with regards to texture 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 will be quite a bit (more or less 21%) more effective at full screen anti-aliasing than the Radeon HD 7790, and also capable of handling higher screen resolutions more effectively. (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 information (counted in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.