GeForce GTX 295 vs Radeon HD 7790

Intro

Compare all that to the Radeon HD 7790, which features GPU clock speed of 1000 MHz, and 1024 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also features 896 Stream Processors, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
GeForce GTX 295		289 Watts
	Difference: 204 Watts (240%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 295 should perform quite a bit faster than the Radeon HD 7790 in general. (explain)

GeForce GTX 295		223776 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 127776 (133%)

Texel Rate

The GeForce GTX 295 is a lot (about 65%) faster with regards to texture filtering than the Radeon HD 7790. (explain)

GeForce GTX 295		92160 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 36160 (65%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 295 is the winner, by a large margin. (explain)

GeForce GTX 295		32256 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 16256 (102%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.