GeForce GTX 465 vs Radeon HD 7790

Intro

Compare those specs to the Radeon HD 7790, which uses a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory is set to run at a speed of 1500 MHz on this specific model. It features 896 SPUs along with 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

As far as performance goes, the GeForce GTX 465 should theoretically be a bit better 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 much (more or less 110%) more effective at 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 should be quite a bit (about 21%) faster with regards to full screen anti-aliasing than the Radeon HD 7790, and will be able to handle higher screen 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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 are applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, 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 video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.