GeForce GTX 465 vs Radeon HD 7790

Intro

Compare all that to the Radeon HD 7790, which features core speeds of 1000 MHz on the GPU, and 1500 MHz on the 1024 MB of GDDR5 memory. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

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

The GeForce GTX 465 should in theory perform just a 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 should be a lot (about 110%) faster with regards to AF 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 a lot (more or less 21%) more effective at anti-aliasing than the Radeon HD 7790, and capable of handling higher resolutions better. (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 largest amount of information (counted in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.