GeForce GTX 260 Core 216 vs Radeon HD 7790

Intro

Compare all that to the Radeon HD 7790, which has a core clock speed of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is made up of 896 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 7790		85 Watts
GeForce GTX 260 Core 216		202 Watts
	Difference: 117 Watts (138%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 260 Core 216 should be a bit faster than the Radeon HD 7790 overall. (explain)

GeForce GTX 260 Core 216		111888 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 15888 (17%)

Texel Rate

The Radeon HD 7790 is a lot (about 35%) better at texture filtering than the GeForce GTX 260 Core 216. (explain)

Radeon HD 7790		56000 Mtexels/sec
GeForce GTX 260 Core 216		41472 Mtexels/sec
	Difference: 14528 (35%)

Pixel Rate

The GeForce GTX 260 Core 216 is just a bit (approximately 1%) better at anti-aliasing than the Radeon HD 7790, and also will be capable of handling higher resolutions better. (explain)

GeForce GTX 260 Core 216		16128 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 128 (1%)

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 max amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total 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 processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.